Abstract

Diverse ultrafast dynamics have been reported on different graphene prepared by different methods. Chemical-vapor-deposited (CVD) growth is regarded as a very promising method for highly efficient production of graphene. However, CVD-grown graphene usually presents only one of the diverse ultrafast dynamics. Thus, control of the ultrafast photo-electronic dynamics of CVD-grown graphene is vital to present diversity for different photodetection applications of CVD-grown graphene. In this paper, we report on the first realization to our knowledge of control of the ultrafast dynamics of CVD-grown graphene and the manifestation of diverse ultrafast dynamics on sole CVD-grown graphene. We study the ultrafast photoelectronic dynamics of CVD-grown graphene with different degrees of oxidation caused by ozone oxidation using femtosecond time-resolved transient differential transmission spectroscopy, and we find that the ultrafast dynamics can evolve obviously with the time of ozone oxidation. The diverse ultrafast dynamics reported previously on different monolayer graphenes prepared by different methods are achieved on the sole CVD-grown graphene by controlling oxidation time. The mechanism for manipulation of the ultrafast dynamics by ozone oxidation is revealed by Raman spectroscopy as the control of the Fermi level of CVD-grown graphene. Simulations of dynamics based on the optical conductivity model of graphene and Fermi level change well reproduce the observed diverse ultrafast dynamics. Our results are very important for the diverse applications of graphene and open a new path toward the diverse ultrafast dynamics on sole graphene prepared by any method.

© 2019 Chinese Laser Press

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References

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    [Crossref]
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    [Crossref]
  4. X. Zhao, Z. B. Liu, W. B. Yan, Y. P. Wu, X. L. Zhang, Y. S. Chen, and J. G. Tian, “Ultrafast carrier dynamics and saturable absorption of solution-processable few-layered graphene oxide,” Appl. Phys. Lett. 98, 121905 (2011).
    [Crossref]
  5. S. Tani, F. Blanchard, and K. Tanaka, “Ultrafast carrier dynamics under a high electric field,” Phys. Rev. Lett. 109, 166603 (2012).
    [Crossref]
  6. T. Li, L. Luo, M. Hupalo, J. Zhang, M. C. Tringides, J. Schmalian, and J. Wang, “Femtosecond population inversion and stimulated emission of dense Dirac fermions in graphene,” Phys. Rev. Lett. 108, 167401 (2012).
    [Crossref]
  7. H. Choi, F. Borondics, D. A. Siegel, S. Y. Zhou, M. C. Martin, A. Lanzara, and R. A. Kaindl, “Broadband electromagnetic response and ultrafast dynamics of few-layer epitaxial graphene,” Appl. Phys. Lett. 94, 172102 (2009).
    [Crossref]
  8. P. A. George, J. Strait, J. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. G. Spencer, “Ultrafast optical-pump THz-probe spectroscopy of the carrier relaxation and recombination dynamics in epitaxial graphene,” Nano Lett. 8, 4248–4251 (2008).
    [Crossref]
  9. L. B. Huang, G. V. Hartland, L.-Q. Chu, Luxmi, R. M. Feenstra, C. X. Lian, K. Tahy, and H. Xing, “Ultrafast transient absorption microscopy studies of carrier dynamics in epitaxial graphene,” Nano Lett. 10, 1308–1313 (2010).
    [Crossref]
  10. L. B. Huang, B. Gao, G. Hartland, M. Kelly, and H. L. Xing, “Ultrafast relaxation of hot optical phonons in monolayer and multilayer graphene on different substrates,” Sur. Sci. 605, 1657–1661 (2011).
    [Crossref]
  11. R. W. Newson, J. Dean, B. Schmidt, and H. M. van Driel, “Ultrafast carrier kinetics in exfoliated graphene and thin graphite films,” Opt. Express 17, 2326–2333 (2009).
    [Crossref]
  12. B. Gao, G. Hartland, T. Fang, M. Kelly, D. Jena, H. L. Xing, and L. B. Huang, “Studies of intrinsic hot phonon dynamics in suspended graphene by transient absorption microscopy,” Nano Lett. 11, 3184–3189 (2011).
    [Crossref]
  13. K. M. Dani, J. Lee, R. Sharma, A. D. Mohite, C. M. Galande, P. M. Ajayan, A. M. Dattelbaum, H. Htoon, A. J. Taylor, and R. P. Prasankumar, “Intraband conductivity response in graphene observed using ultrafast infrared-pump visible-probe spectroscopy,” Phys. Rev. B 86, 125403 (2012).
    [Crossref]
  14. J. Z. Shang, T. Yu, J. Y. Lin, and G. G. Gurzadyan, “Ultrafast electron-optical phonon scattering and quasiparticle lifetime in CVD-grown graphene,” ACS Nano 5, 3278–3283 (2011).
    [Crossref]
  15. J. Z. Shang, Z. Q. Luo, C. X. Cong, J. Y. Lin, T. Yu, and G. G. Gurzadyan, “Femtosecond UV-pump/visible-probe measurements of carrier dynamics in stacked graphene films,” Appl. Phys. Lett. 97, 163103 (2010).
    [Crossref]
  16. M. Breusing, S. Kuehn, T. Winzer, E. Malić, F. Milde, N. Severin, J. P. Rabe, C. Ropers, A. Knorr, and T. Elsaesser, “Ultrafast nonequilibrium carrier dynamics in a single graphene layer,” Phys. Rev. B 83, 153410 (2011).
    [Crossref]
  17. D. Sun, Z. K. Wu, C. Divin, X. B. Li, C. Berger, W. A. De Heer, P. N. First, and T. B. Norris, “Ultrafast relaxation of excited Dirac fermions in epitaxial graphene using optical differential transmission spectroscopy,” Phys. Rev. Lett. 101, 157402 (2008).
    [Crossref]
  18. K. Chen, H. H. Li, L.-P. Ma, W. C. Ren, T.-F. Chung, H.-M. Cheng, Y. P. Chen, and T. S. Lai, “Diversity of ultrafast hot-carrier-induced dynamics and striking sub-femtosecond hot-carrier scattering times in graphene,” Carbon 72, 402–409 (2014).
    [Crossref]
  19. K. Chen, M. N. Yogeesh, Y. Huang, S. Q. Zhang, F. He, X. H. Meng, S. Y. Fang, N. Sheehan, T. H. Tao, S. R. Bank, J. H. Lin, D. Akinwande, P. Sutter, T. S. Lai, and Y. G. Wang, “Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique,” Carbon 107, 233–239 (2016).
    [Crossref]
  20. Y. N. Mulyana, M. Uenuma, Y. Ishikawa, and Y. H. Uraoka, “Reversible oxidation of graphene through ultraviolet/ozone treatment and its nonthermal reduction through ultraviolet irradiation,” J. Phys. Chem. C 118, 27372–27381 (2014).
    [Crossref]
  21. N. Leconte, J. Moser, P. Ordejón, H. H. Tao, A. Lherbier, A. Bachtold, F. Alsina, C. M. S. Torres, J.-C. Charlier, and S. Roche, “Damaging graphene with ozone treatment: a chemically tunable metal-insulator transition,” ACS Nano 4, 4033–4038 (2010).
    [Crossref]
  22. J. T. Yuan, L.-P. Ma, S. F. Pei, J. H. Du, Y. Su, W. C. Ren, and H.-M. Cheng, “Tuning the electrical and optical properties of graphene by ozone treatment for patterning monolithic transparent electrodes,” ACS Nano 7, 4233–4241 (2013).
    [Crossref]
  23. A. I. Aria, A. W. Gani, and M. Gharib, “Effect of dry oxidation on the energy gap and chemical composition of CVD graphene on nickel,” Appl. Surf. Sci. 293, 1–11 (2014).
    [Crossref]
  24. S. Huh, J. Park, Y. S. Kim, K. S. Kim, B. H. Hong, and J.-M. Nam, “UV/ozone-oxidized large-scale graphene platform with large chemical enhancement in surface-enhanced Raman scattering,” ACS Nano 5, 9799–9806 (2011).
    [Crossref]
  25. F. Xia, T. Mueller, Y.-M. Lin, A. Valdes-Garcia, and P. Avouris, “Ultrafast graphene photodetector,” Nat. Nanotechnol. 4, 839–843 (2009).
    [Crossref]
  26. Y. F. Song, H. Zhang, D. Y. Tang, and D. Y. Shen, “Polarization rotation vector solitons in a graphene mode-locked fiber laser,” Opt. Express 20, 27283–27289 (2012).
    [Crossref]
  27. Y. F. Song, L. Li, H. Zhang, D. Y. Shen, D. Y. Tang, and K. P. Loh, “Vector multi-soliton operation and interaction in a graphene mode-locked fiber laser,” Opt. Express 21, 10010–10018 (2013).
    [Crossref]
  28. L. B. Gao, W. C. Ren, J. P. Zhao, L.-P. Ma, Z. P. Chen, and H.-M. Cheng, “Efficient growth of high-quality graphene films on Cu foils by ambient pressure chemical vapor deposition,” Appl. Phys. Lett. 97, 183109 (2010).
    [Crossref]
  29. K. Chen, W. F. Wang, J. M. Chen, J. H. Wen, and T. S. Lai, “A transmission-grating-modulated pump-probe absorption spectroscopy and demonstration of diffusion dynamics of photoexcited carriers in bulk intrinsic GaAs film,” Opt. Express 20, 3580–3585 (2012).
    [Crossref]
  30. A. Das, S. Pisana, B. Chakraborty, S. Piscanec, S. K. Saha, U. V. Waghmare, K. S. Novoselov, H. R. Krishnamurthy, A. K. Geim, A. C. Ferrari, and A. K. Sood, “Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor,” Nat. Nanotechnol. 3, 210–215 (2008).
    [Crossref]

2016 (1)

K. Chen, M. N. Yogeesh, Y. Huang, S. Q. Zhang, F. He, X. H. Meng, S. Y. Fang, N. Sheehan, T. H. Tao, S. R. Bank, J. H. Lin, D. Akinwande, P. Sutter, T. S. Lai, and Y. G. Wang, “Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique,” Carbon 107, 233–239 (2016).
[Crossref]

2014 (3)

Y. N. Mulyana, M. Uenuma, Y. Ishikawa, and Y. H. Uraoka, “Reversible oxidation of graphene through ultraviolet/ozone treatment and its nonthermal reduction through ultraviolet irradiation,” J. Phys. Chem. C 118, 27372–27381 (2014).
[Crossref]

K. Chen, H. H. Li, L.-P. Ma, W. C. Ren, T.-F. Chung, H.-M. Cheng, Y. P. Chen, and T. S. Lai, “Diversity of ultrafast hot-carrier-induced dynamics and striking sub-femtosecond hot-carrier scattering times in graphene,” Carbon 72, 402–409 (2014).
[Crossref]

A. I. Aria, A. W. Gani, and M. Gharib, “Effect of dry oxidation on the energy gap and chemical composition of CVD graphene on nickel,” Appl. Surf. Sci. 293, 1–11 (2014).
[Crossref]

2013 (2)

Y. F. Song, L. Li, H. Zhang, D. Y. Shen, D. Y. Tang, and K. P. Loh, “Vector multi-soliton operation and interaction in a graphene mode-locked fiber laser,” Opt. Express 21, 10010–10018 (2013).
[Crossref]

J. T. Yuan, L.-P. Ma, S. F. Pei, J. H. Du, Y. Su, W. C. Ren, and H.-M. Cheng, “Tuning the electrical and optical properties of graphene by ozone treatment for patterning monolithic transparent electrodes,” ACS Nano 7, 4233–4241 (2013).
[Crossref]

2012 (5)

K. Chen, W. F. Wang, J. M. Chen, J. H. Wen, and T. S. Lai, “A transmission-grating-modulated pump-probe absorption spectroscopy and demonstration of diffusion dynamics of photoexcited carriers in bulk intrinsic GaAs film,” Opt. Express 20, 3580–3585 (2012).
[Crossref]

Y. F. Song, H. Zhang, D. Y. Tang, and D. Y. Shen, “Polarization rotation vector solitons in a graphene mode-locked fiber laser,” Opt. Express 20, 27283–27289 (2012).
[Crossref]

S. Tani, F. Blanchard, and K. Tanaka, “Ultrafast carrier dynamics under a high electric field,” Phys. Rev. Lett. 109, 166603 (2012).
[Crossref]

T. Li, L. Luo, M. Hupalo, J. Zhang, M. C. Tringides, J. Schmalian, and J. Wang, “Femtosecond population inversion and stimulated emission of dense Dirac fermions in graphene,” Phys. Rev. Lett. 108, 167401 (2012).
[Crossref]

K. M. Dani, J. Lee, R. Sharma, A. D. Mohite, C. M. Galande, P. M. Ajayan, A. M. Dattelbaum, H. Htoon, A. J. Taylor, and R. P. Prasankumar, “Intraband conductivity response in graphene observed using ultrafast infrared-pump visible-probe spectroscopy,” Phys. Rev. B 86, 125403 (2012).
[Crossref]

2011 (6)

J. Z. Shang, T. Yu, J. Y. Lin, and G. G. Gurzadyan, “Ultrafast electron-optical phonon scattering and quasiparticle lifetime in CVD-grown graphene,” ACS Nano 5, 3278–3283 (2011).
[Crossref]

M. Breusing, S. Kuehn, T. Winzer, E. Malić, F. Milde, N. Severin, J. P. Rabe, C. Ropers, A. Knorr, and T. Elsaesser, “Ultrafast nonequilibrium carrier dynamics in a single graphene layer,” Phys. Rev. B 83, 153410 (2011).
[Crossref]

L. B. Huang, B. Gao, G. Hartland, M. Kelly, and H. L. Xing, “Ultrafast relaxation of hot optical phonons in monolayer and multilayer graphene on different substrates,” Sur. Sci. 605, 1657–1661 (2011).
[Crossref]

B. Gao, G. Hartland, T. Fang, M. Kelly, D. Jena, H. L. Xing, and L. B. Huang, “Studies of intrinsic hot phonon dynamics in suspended graphene by transient absorption microscopy,” Nano Lett. 11, 3184–3189 (2011).
[Crossref]

X. Zhao, Z. B. Liu, W. B. Yan, Y. P. Wu, X. L. Zhang, Y. S. Chen, and J. G. Tian, “Ultrafast carrier dynamics and saturable absorption of solution-processable few-layered graphene oxide,” Appl. Phys. Lett. 98, 121905 (2011).
[Crossref]

S. Huh, J. Park, Y. S. Kim, K. S. Kim, B. H. Hong, and J.-M. Nam, “UV/ozone-oxidized large-scale graphene platform with large chemical enhancement in surface-enhanced Raman scattering,” ACS Nano 5, 9799–9806 (2011).
[Crossref]

2010 (6)

L. B. Gao, W. C. Ren, J. P. Zhao, L.-P. Ma, Z. P. Chen, and H.-M. Cheng, “Efficient growth of high-quality graphene films on Cu foils by ambient pressure chemical vapor deposition,” Appl. Phys. Lett. 97, 183109 (2010).
[Crossref]

N. Leconte, J. Moser, P. Ordejón, H. H. Tao, A. Lherbier, A. Bachtold, F. Alsina, C. M. S. Torres, J.-C. Charlier, and S. Roche, “Damaging graphene with ozone treatment: a chemically tunable metal-insulator transition,” ACS Nano 4, 4033–4038 (2010).
[Crossref]

H. N. Wang, J. H. Strait, P. A. George, S. Shivaraman, V. B. Shields, M. Chandrashekhar, J. Hwang, F. Rana, M. G. Spencer, C. S. Ruiz-Vargas, and J. Park, “Ultrafast relaxation dynamics of hot optical phonons in graphene,” Appl. Phys. Lett. 96, 081917 (2010).
[Crossref]

B. A. Ruzicka, L. K. Werake, H. Zhao, S. Wang, and K. P. Loh, “Femtosecond pump-probe studies of reduced graphene oxide thin films,” Appl. Phys. Lett. 96, 173106 (2010).
[Crossref]

L. B. Huang, G. V. Hartland, L.-Q. Chu, Luxmi, R. M. Feenstra, C. X. Lian, K. Tahy, and H. Xing, “Ultrafast transient absorption microscopy studies of carrier dynamics in epitaxial graphene,” Nano Lett. 10, 1308–1313 (2010).
[Crossref]

J. Z. Shang, Z. Q. Luo, C. X. Cong, J. Y. Lin, T. Yu, and G. G. Gurzadyan, “Femtosecond UV-pump/visible-probe measurements of carrier dynamics in stacked graphene films,” Appl. Phys. Lett. 97, 163103 (2010).
[Crossref]

2009 (3)

R. W. Newson, J. Dean, B. Schmidt, and H. M. van Driel, “Ultrafast carrier kinetics in exfoliated graphene and thin graphite films,” Opt. Express 17, 2326–2333 (2009).
[Crossref]

H. Choi, F. Borondics, D. A. Siegel, S. Y. Zhou, M. C. Martin, A. Lanzara, and R. A. Kaindl, “Broadband electromagnetic response and ultrafast dynamics of few-layer epitaxial graphene,” Appl. Phys. Lett. 94, 172102 (2009).
[Crossref]

F. Xia, T. Mueller, Y.-M. Lin, A. Valdes-Garcia, and P. Avouris, “Ultrafast graphene photodetector,” Nat. Nanotechnol. 4, 839–843 (2009).
[Crossref]

2008 (4)

A. Das, S. Pisana, B. Chakraborty, S. Piscanec, S. K. Saha, U. V. Waghmare, K. S. Novoselov, H. R. Krishnamurthy, A. K. Geim, A. C. Ferrari, and A. K. Sood, “Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor,” Nat. Nanotechnol. 3, 210–215 (2008).
[Crossref]

P. A. George, J. Strait, J. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. G. Spencer, “Ultrafast optical-pump THz-probe spectroscopy of the carrier relaxation and recombination dynamics in epitaxial graphene,” Nano Lett. 8, 4248–4251 (2008).
[Crossref]

J. M. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. G. Spencer, “Measurement of ultrafast carrier dynamics in epitaxial graphene,” Appl. Phys. Lett. 92, 042116 (2008).
[Crossref]

D. Sun, Z. K. Wu, C. Divin, X. B. Li, C. Berger, W. A. De Heer, P. N. First, and T. B. Norris, “Ultrafast relaxation of excited Dirac fermions in epitaxial graphene using optical differential transmission spectroscopy,” Phys. Rev. Lett. 101, 157402 (2008).
[Crossref]

Ajayan, P. M.

K. M. Dani, J. Lee, R. Sharma, A. D. Mohite, C. M. Galande, P. M. Ajayan, A. M. Dattelbaum, H. Htoon, A. J. Taylor, and R. P. Prasankumar, “Intraband conductivity response in graphene observed using ultrafast infrared-pump visible-probe spectroscopy,” Phys. Rev. B 86, 125403 (2012).
[Crossref]

Akinwande, D.

K. Chen, M. N. Yogeesh, Y. Huang, S. Q. Zhang, F. He, X. H. Meng, S. Y. Fang, N. Sheehan, T. H. Tao, S. R. Bank, J. H. Lin, D. Akinwande, P. Sutter, T. S. Lai, and Y. G. Wang, “Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique,” Carbon 107, 233–239 (2016).
[Crossref]

Alsina, F.

N. Leconte, J. Moser, P. Ordejón, H. H. Tao, A. Lherbier, A. Bachtold, F. Alsina, C. M. S. Torres, J.-C. Charlier, and S. Roche, “Damaging graphene with ozone treatment: a chemically tunable metal-insulator transition,” ACS Nano 4, 4033–4038 (2010).
[Crossref]

Aria, A. I.

A. I. Aria, A. W. Gani, and M. Gharib, “Effect of dry oxidation on the energy gap and chemical composition of CVD graphene on nickel,” Appl. Surf. Sci. 293, 1–11 (2014).
[Crossref]

Avouris, P.

F. Xia, T. Mueller, Y.-M. Lin, A. Valdes-Garcia, and P. Avouris, “Ultrafast graphene photodetector,” Nat. Nanotechnol. 4, 839–843 (2009).
[Crossref]

Bachtold, A.

N. Leconte, J. Moser, P. Ordejón, H. H. Tao, A. Lherbier, A. Bachtold, F. Alsina, C. M. S. Torres, J.-C. Charlier, and S. Roche, “Damaging graphene with ozone treatment: a chemically tunable metal-insulator transition,” ACS Nano 4, 4033–4038 (2010).
[Crossref]

Bank, S. R.

K. Chen, M. N. Yogeesh, Y. Huang, S. Q. Zhang, F. He, X. H. Meng, S. Y. Fang, N. Sheehan, T. H. Tao, S. R. Bank, J. H. Lin, D. Akinwande, P. Sutter, T. S. Lai, and Y. G. Wang, “Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique,” Carbon 107, 233–239 (2016).
[Crossref]

Berger, C.

D. Sun, Z. K. Wu, C. Divin, X. B. Li, C. Berger, W. A. De Heer, P. N. First, and T. B. Norris, “Ultrafast relaxation of excited Dirac fermions in epitaxial graphene using optical differential transmission spectroscopy,” Phys. Rev. Lett. 101, 157402 (2008).
[Crossref]

Blanchard, F.

S. Tani, F. Blanchard, and K. Tanaka, “Ultrafast carrier dynamics under a high electric field,” Phys. Rev. Lett. 109, 166603 (2012).
[Crossref]

Borondics, F.

H. Choi, F. Borondics, D. A. Siegel, S. Y. Zhou, M. C. Martin, A. Lanzara, and R. A. Kaindl, “Broadband electromagnetic response and ultrafast dynamics of few-layer epitaxial graphene,” Appl. Phys. Lett. 94, 172102 (2009).
[Crossref]

Breusing, M.

M. Breusing, S. Kuehn, T. Winzer, E. Malić, F. Milde, N. Severin, J. P. Rabe, C. Ropers, A. Knorr, and T. Elsaesser, “Ultrafast nonequilibrium carrier dynamics in a single graphene layer,” Phys. Rev. B 83, 153410 (2011).
[Crossref]

Chakraborty, B.

A. Das, S. Pisana, B. Chakraborty, S. Piscanec, S. K. Saha, U. V. Waghmare, K. S. Novoselov, H. R. Krishnamurthy, A. K. Geim, A. C. Ferrari, and A. K. Sood, “Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor,” Nat. Nanotechnol. 3, 210–215 (2008).
[Crossref]

Chandrashekhar, M.

H. N. Wang, J. H. Strait, P. A. George, S. Shivaraman, V. B. Shields, M. Chandrashekhar, J. Hwang, F. Rana, M. G. Spencer, C. S. Ruiz-Vargas, and J. Park, “Ultrafast relaxation dynamics of hot optical phonons in graphene,” Appl. Phys. Lett. 96, 081917 (2010).
[Crossref]

J. M. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. G. Spencer, “Measurement of ultrafast carrier dynamics in epitaxial graphene,” Appl. Phys. Lett. 92, 042116 (2008).
[Crossref]

P. A. George, J. Strait, J. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. G. Spencer, “Ultrafast optical-pump THz-probe spectroscopy of the carrier relaxation and recombination dynamics in epitaxial graphene,” Nano Lett. 8, 4248–4251 (2008).
[Crossref]

Charlier, J.-C.

N. Leconte, J. Moser, P. Ordejón, H. H. Tao, A. Lherbier, A. Bachtold, F. Alsina, C. M. S. Torres, J.-C. Charlier, and S. Roche, “Damaging graphene with ozone treatment: a chemically tunable metal-insulator transition,” ACS Nano 4, 4033–4038 (2010).
[Crossref]

Chen, J. M.

Chen, K.

K. Chen, M. N. Yogeesh, Y. Huang, S. Q. Zhang, F. He, X. H. Meng, S. Y. Fang, N. Sheehan, T. H. Tao, S. R. Bank, J. H. Lin, D. Akinwande, P. Sutter, T. S. Lai, and Y. G. Wang, “Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique,” Carbon 107, 233–239 (2016).
[Crossref]

K. Chen, H. H. Li, L.-P. Ma, W. C. Ren, T.-F. Chung, H.-M. Cheng, Y. P. Chen, and T. S. Lai, “Diversity of ultrafast hot-carrier-induced dynamics and striking sub-femtosecond hot-carrier scattering times in graphene,” Carbon 72, 402–409 (2014).
[Crossref]

K. Chen, W. F. Wang, J. M. Chen, J. H. Wen, and T. S. Lai, “A transmission-grating-modulated pump-probe absorption spectroscopy and demonstration of diffusion dynamics of photoexcited carriers in bulk intrinsic GaAs film,” Opt. Express 20, 3580–3585 (2012).
[Crossref]

Chen, Y. P.

K. Chen, H. H. Li, L.-P. Ma, W. C. Ren, T.-F. Chung, H.-M. Cheng, Y. P. Chen, and T. S. Lai, “Diversity of ultrafast hot-carrier-induced dynamics and striking sub-femtosecond hot-carrier scattering times in graphene,” Carbon 72, 402–409 (2014).
[Crossref]

Chen, Y. S.

X. Zhao, Z. B. Liu, W. B. Yan, Y. P. Wu, X. L. Zhang, Y. S. Chen, and J. G. Tian, “Ultrafast carrier dynamics and saturable absorption of solution-processable few-layered graphene oxide,” Appl. Phys. Lett. 98, 121905 (2011).
[Crossref]

Chen, Z. P.

L. B. Gao, W. C. Ren, J. P. Zhao, L.-P. Ma, Z. P. Chen, and H.-M. Cheng, “Efficient growth of high-quality graphene films on Cu foils by ambient pressure chemical vapor deposition,” Appl. Phys. Lett. 97, 183109 (2010).
[Crossref]

Cheng, H.-M.

K. Chen, H. H. Li, L.-P. Ma, W. C. Ren, T.-F. Chung, H.-M. Cheng, Y. P. Chen, and T. S. Lai, “Diversity of ultrafast hot-carrier-induced dynamics and striking sub-femtosecond hot-carrier scattering times in graphene,” Carbon 72, 402–409 (2014).
[Crossref]

J. T. Yuan, L.-P. Ma, S. F. Pei, J. H. Du, Y. Su, W. C. Ren, and H.-M. Cheng, “Tuning the electrical and optical properties of graphene by ozone treatment for patterning monolithic transparent electrodes,” ACS Nano 7, 4233–4241 (2013).
[Crossref]

L. B. Gao, W. C. Ren, J. P. Zhao, L.-P. Ma, Z. P. Chen, and H.-M. Cheng, “Efficient growth of high-quality graphene films on Cu foils by ambient pressure chemical vapor deposition,” Appl. Phys. Lett. 97, 183109 (2010).
[Crossref]

Choi, H.

H. Choi, F. Borondics, D. A. Siegel, S. Y. Zhou, M. C. Martin, A. Lanzara, and R. A. Kaindl, “Broadband electromagnetic response and ultrafast dynamics of few-layer epitaxial graphene,” Appl. Phys. Lett. 94, 172102 (2009).
[Crossref]

Chu, L.-Q.

L. B. Huang, G. V. Hartland, L.-Q. Chu, Luxmi, R. M. Feenstra, C. X. Lian, K. Tahy, and H. Xing, “Ultrafast transient absorption microscopy studies of carrier dynamics in epitaxial graphene,” Nano Lett. 10, 1308–1313 (2010).
[Crossref]

Chung, T.-F.

K. Chen, H. H. Li, L.-P. Ma, W. C. Ren, T.-F. Chung, H.-M. Cheng, Y. P. Chen, and T. S. Lai, “Diversity of ultrafast hot-carrier-induced dynamics and striking sub-femtosecond hot-carrier scattering times in graphene,” Carbon 72, 402–409 (2014).
[Crossref]

Cong, C. X.

J. Z. Shang, Z. Q. Luo, C. X. Cong, J. Y. Lin, T. Yu, and G. G. Gurzadyan, “Femtosecond UV-pump/visible-probe measurements of carrier dynamics in stacked graphene films,” Appl. Phys. Lett. 97, 163103 (2010).
[Crossref]

Dani, K. M.

K. M. Dani, J. Lee, R. Sharma, A. D. Mohite, C. M. Galande, P. M. Ajayan, A. M. Dattelbaum, H. Htoon, A. J. Taylor, and R. P. Prasankumar, “Intraband conductivity response in graphene observed using ultrafast infrared-pump visible-probe spectroscopy,” Phys. Rev. B 86, 125403 (2012).
[Crossref]

Das, A.

A. Das, S. Pisana, B. Chakraborty, S. Piscanec, S. K. Saha, U. V. Waghmare, K. S. Novoselov, H. R. Krishnamurthy, A. K. Geim, A. C. Ferrari, and A. K. Sood, “Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor,” Nat. Nanotechnol. 3, 210–215 (2008).
[Crossref]

Dattelbaum, A. M.

K. M. Dani, J. Lee, R. Sharma, A. D. Mohite, C. M. Galande, P. M. Ajayan, A. M. Dattelbaum, H. Htoon, A. J. Taylor, and R. P. Prasankumar, “Intraband conductivity response in graphene observed using ultrafast infrared-pump visible-probe spectroscopy,” Phys. Rev. B 86, 125403 (2012).
[Crossref]

Dawlaty, J.

P. A. George, J. Strait, J. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. G. Spencer, “Ultrafast optical-pump THz-probe spectroscopy of the carrier relaxation and recombination dynamics in epitaxial graphene,” Nano Lett. 8, 4248–4251 (2008).
[Crossref]

Dawlaty, J. M.

J. M. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. G. Spencer, “Measurement of ultrafast carrier dynamics in epitaxial graphene,” Appl. Phys. Lett. 92, 042116 (2008).
[Crossref]

De Heer, W. A.

D. Sun, Z. K. Wu, C. Divin, X. B. Li, C. Berger, W. A. De Heer, P. N. First, and T. B. Norris, “Ultrafast relaxation of excited Dirac fermions in epitaxial graphene using optical differential transmission spectroscopy,” Phys. Rev. Lett. 101, 157402 (2008).
[Crossref]

Dean, J.

Divin, C.

D. Sun, Z. K. Wu, C. Divin, X. B. Li, C. Berger, W. A. De Heer, P. N. First, and T. B. Norris, “Ultrafast relaxation of excited Dirac fermions in epitaxial graphene using optical differential transmission spectroscopy,” Phys. Rev. Lett. 101, 157402 (2008).
[Crossref]

Du, J. H.

J. T. Yuan, L.-P. Ma, S. F. Pei, J. H. Du, Y. Su, W. C. Ren, and H.-M. Cheng, “Tuning the electrical and optical properties of graphene by ozone treatment for patterning monolithic transparent electrodes,” ACS Nano 7, 4233–4241 (2013).
[Crossref]

Elsaesser, T.

M. Breusing, S. Kuehn, T. Winzer, E. Malić, F. Milde, N. Severin, J. P. Rabe, C. Ropers, A. Knorr, and T. Elsaesser, “Ultrafast nonequilibrium carrier dynamics in a single graphene layer,” Phys. Rev. B 83, 153410 (2011).
[Crossref]

Fang, S. Y.

K. Chen, M. N. Yogeesh, Y. Huang, S. Q. Zhang, F. He, X. H. Meng, S. Y. Fang, N. Sheehan, T. H. Tao, S. R. Bank, J. H. Lin, D. Akinwande, P. Sutter, T. S. Lai, and Y. G. Wang, “Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique,” Carbon 107, 233–239 (2016).
[Crossref]

Fang, T.

B. Gao, G. Hartland, T. Fang, M. Kelly, D. Jena, H. L. Xing, and L. B. Huang, “Studies of intrinsic hot phonon dynamics in suspended graphene by transient absorption microscopy,” Nano Lett. 11, 3184–3189 (2011).
[Crossref]

Feenstra, R. M.

L. B. Huang, G. V. Hartland, L.-Q. Chu, Luxmi, R. M. Feenstra, C. X. Lian, K. Tahy, and H. Xing, “Ultrafast transient absorption microscopy studies of carrier dynamics in epitaxial graphene,” Nano Lett. 10, 1308–1313 (2010).
[Crossref]

Ferrari, A. C.

A. Das, S. Pisana, B. Chakraborty, S. Piscanec, S. K. Saha, U. V. Waghmare, K. S. Novoselov, H. R. Krishnamurthy, A. K. Geim, A. C. Ferrari, and A. K. Sood, “Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor,” Nat. Nanotechnol. 3, 210–215 (2008).
[Crossref]

First, P. N.

D. Sun, Z. K. Wu, C. Divin, X. B. Li, C. Berger, W. A. De Heer, P. N. First, and T. B. Norris, “Ultrafast relaxation of excited Dirac fermions in epitaxial graphene using optical differential transmission spectroscopy,” Phys. Rev. Lett. 101, 157402 (2008).
[Crossref]

Galande, C. M.

K. M. Dani, J. Lee, R. Sharma, A. D. Mohite, C. M. Galande, P. M. Ajayan, A. M. Dattelbaum, H. Htoon, A. J. Taylor, and R. P. Prasankumar, “Intraband conductivity response in graphene observed using ultrafast infrared-pump visible-probe spectroscopy,” Phys. Rev. B 86, 125403 (2012).
[Crossref]

Gani, A. W.

A. I. Aria, A. W. Gani, and M. Gharib, “Effect of dry oxidation on the energy gap and chemical composition of CVD graphene on nickel,” Appl. Surf. Sci. 293, 1–11 (2014).
[Crossref]

Gao, B.

B. Gao, G. Hartland, T. Fang, M. Kelly, D. Jena, H. L. Xing, and L. B. Huang, “Studies of intrinsic hot phonon dynamics in suspended graphene by transient absorption microscopy,” Nano Lett. 11, 3184–3189 (2011).
[Crossref]

L. B. Huang, B. Gao, G. Hartland, M. Kelly, and H. L. Xing, “Ultrafast relaxation of hot optical phonons in monolayer and multilayer graphene on different substrates,” Sur. Sci. 605, 1657–1661 (2011).
[Crossref]

Gao, L. B.

L. B. Gao, W. C. Ren, J. P. Zhao, L.-P. Ma, Z. P. Chen, and H.-M. Cheng, “Efficient growth of high-quality graphene films on Cu foils by ambient pressure chemical vapor deposition,” Appl. Phys. Lett. 97, 183109 (2010).
[Crossref]

Geim, A. K.

A. Das, S. Pisana, B. Chakraborty, S. Piscanec, S. K. Saha, U. V. Waghmare, K. S. Novoselov, H. R. Krishnamurthy, A. K. Geim, A. C. Ferrari, and A. K. Sood, “Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor,” Nat. Nanotechnol. 3, 210–215 (2008).
[Crossref]

George, P. A.

H. N. Wang, J. H. Strait, P. A. George, S. Shivaraman, V. B. Shields, M. Chandrashekhar, J. Hwang, F. Rana, M. G. Spencer, C. S. Ruiz-Vargas, and J. Park, “Ultrafast relaxation dynamics of hot optical phonons in graphene,” Appl. Phys. Lett. 96, 081917 (2010).
[Crossref]

P. A. George, J. Strait, J. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. G. Spencer, “Ultrafast optical-pump THz-probe spectroscopy of the carrier relaxation and recombination dynamics in epitaxial graphene,” Nano Lett. 8, 4248–4251 (2008).
[Crossref]

Gharib, M.

A. I. Aria, A. W. Gani, and M. Gharib, “Effect of dry oxidation on the energy gap and chemical composition of CVD graphene on nickel,” Appl. Surf. Sci. 293, 1–11 (2014).
[Crossref]

Gurzadyan, G. G.

J. Z. Shang, T. Yu, J. Y. Lin, and G. G. Gurzadyan, “Ultrafast electron-optical phonon scattering and quasiparticle lifetime in CVD-grown graphene,” ACS Nano 5, 3278–3283 (2011).
[Crossref]

J. Z. Shang, Z. Q. Luo, C. X. Cong, J. Y. Lin, T. Yu, and G. G. Gurzadyan, “Femtosecond UV-pump/visible-probe measurements of carrier dynamics in stacked graphene films,” Appl. Phys. Lett. 97, 163103 (2010).
[Crossref]

Hartland, G.

L. B. Huang, B. Gao, G. Hartland, M. Kelly, and H. L. Xing, “Ultrafast relaxation of hot optical phonons in monolayer and multilayer graphene on different substrates,” Sur. Sci. 605, 1657–1661 (2011).
[Crossref]

B. Gao, G. Hartland, T. Fang, M. Kelly, D. Jena, H. L. Xing, and L. B. Huang, “Studies of intrinsic hot phonon dynamics in suspended graphene by transient absorption microscopy,” Nano Lett. 11, 3184–3189 (2011).
[Crossref]

Hartland, G. V.

L. B. Huang, G. V. Hartland, L.-Q. Chu, Luxmi, R. M. Feenstra, C. X. Lian, K. Tahy, and H. Xing, “Ultrafast transient absorption microscopy studies of carrier dynamics in epitaxial graphene,” Nano Lett. 10, 1308–1313 (2010).
[Crossref]

He, F.

K. Chen, M. N. Yogeesh, Y. Huang, S. Q. Zhang, F. He, X. H. Meng, S. Y. Fang, N. Sheehan, T. H. Tao, S. R. Bank, J. H. Lin, D. Akinwande, P. Sutter, T. S. Lai, and Y. G. Wang, “Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique,” Carbon 107, 233–239 (2016).
[Crossref]

Hong, B. H.

S. Huh, J. Park, Y. S. Kim, K. S. Kim, B. H. Hong, and J.-M. Nam, “UV/ozone-oxidized large-scale graphene platform with large chemical enhancement in surface-enhanced Raman scattering,” ACS Nano 5, 9799–9806 (2011).
[Crossref]

Htoon, H.

K. M. Dani, J. Lee, R. Sharma, A. D. Mohite, C. M. Galande, P. M. Ajayan, A. M. Dattelbaum, H. Htoon, A. J. Taylor, and R. P. Prasankumar, “Intraband conductivity response in graphene observed using ultrafast infrared-pump visible-probe spectroscopy,” Phys. Rev. B 86, 125403 (2012).
[Crossref]

Huang, L. B.

L. B. Huang, B. Gao, G. Hartland, M. Kelly, and H. L. Xing, “Ultrafast relaxation of hot optical phonons in monolayer and multilayer graphene on different substrates,” Sur. Sci. 605, 1657–1661 (2011).
[Crossref]

B. Gao, G. Hartland, T. Fang, M. Kelly, D. Jena, H. L. Xing, and L. B. Huang, “Studies of intrinsic hot phonon dynamics in suspended graphene by transient absorption microscopy,” Nano Lett. 11, 3184–3189 (2011).
[Crossref]

L. B. Huang, G. V. Hartland, L.-Q. Chu, Luxmi, R. M. Feenstra, C. X. Lian, K. Tahy, and H. Xing, “Ultrafast transient absorption microscopy studies of carrier dynamics in epitaxial graphene,” Nano Lett. 10, 1308–1313 (2010).
[Crossref]

Huang, Y.

K. Chen, M. N. Yogeesh, Y. Huang, S. Q. Zhang, F. He, X. H. Meng, S. Y. Fang, N. Sheehan, T. H. Tao, S. R. Bank, J. H. Lin, D. Akinwande, P. Sutter, T. S. Lai, and Y. G. Wang, “Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique,” Carbon 107, 233–239 (2016).
[Crossref]

Huh, S.

S. Huh, J. Park, Y. S. Kim, K. S. Kim, B. H. Hong, and J.-M. Nam, “UV/ozone-oxidized large-scale graphene platform with large chemical enhancement in surface-enhanced Raman scattering,” ACS Nano 5, 9799–9806 (2011).
[Crossref]

Hupalo, M.

T. Li, L. Luo, M. Hupalo, J. Zhang, M. C. Tringides, J. Schmalian, and J. Wang, “Femtosecond population inversion and stimulated emission of dense Dirac fermions in graphene,” Phys. Rev. Lett. 108, 167401 (2012).
[Crossref]

Hwang, J.

H. N. Wang, J. H. Strait, P. A. George, S. Shivaraman, V. B. Shields, M. Chandrashekhar, J. Hwang, F. Rana, M. G. Spencer, C. S. Ruiz-Vargas, and J. Park, “Ultrafast relaxation dynamics of hot optical phonons in graphene,” Appl. Phys. Lett. 96, 081917 (2010).
[Crossref]

Ishikawa, Y.

Y. N. Mulyana, M. Uenuma, Y. Ishikawa, and Y. H. Uraoka, “Reversible oxidation of graphene through ultraviolet/ozone treatment and its nonthermal reduction through ultraviolet irradiation,” J. Phys. Chem. C 118, 27372–27381 (2014).
[Crossref]

Jena, D.

B. Gao, G. Hartland, T. Fang, M. Kelly, D. Jena, H. L. Xing, and L. B. Huang, “Studies of intrinsic hot phonon dynamics in suspended graphene by transient absorption microscopy,” Nano Lett. 11, 3184–3189 (2011).
[Crossref]

Kaindl, R. A.

H. Choi, F. Borondics, D. A. Siegel, S. Y. Zhou, M. C. Martin, A. Lanzara, and R. A. Kaindl, “Broadband electromagnetic response and ultrafast dynamics of few-layer epitaxial graphene,” Appl. Phys. Lett. 94, 172102 (2009).
[Crossref]

Kelly, M.

L. B. Huang, B. Gao, G. Hartland, M. Kelly, and H. L. Xing, “Ultrafast relaxation of hot optical phonons in monolayer and multilayer graphene on different substrates,” Sur. Sci. 605, 1657–1661 (2011).
[Crossref]

B. Gao, G. Hartland, T. Fang, M. Kelly, D. Jena, H. L. Xing, and L. B. Huang, “Studies of intrinsic hot phonon dynamics in suspended graphene by transient absorption microscopy,” Nano Lett. 11, 3184–3189 (2011).
[Crossref]

Kim, K. S.

S. Huh, J. Park, Y. S. Kim, K. S. Kim, B. H. Hong, and J.-M. Nam, “UV/ozone-oxidized large-scale graphene platform with large chemical enhancement in surface-enhanced Raman scattering,” ACS Nano 5, 9799–9806 (2011).
[Crossref]

Kim, Y. S.

S. Huh, J. Park, Y. S. Kim, K. S. Kim, B. H. Hong, and J.-M. Nam, “UV/ozone-oxidized large-scale graphene platform with large chemical enhancement in surface-enhanced Raman scattering,” ACS Nano 5, 9799–9806 (2011).
[Crossref]

Knorr, A.

M. Breusing, S. Kuehn, T. Winzer, E. Malić, F. Milde, N. Severin, J. P. Rabe, C. Ropers, A. Knorr, and T. Elsaesser, “Ultrafast nonequilibrium carrier dynamics in a single graphene layer,” Phys. Rev. B 83, 153410 (2011).
[Crossref]

Krishnamurthy, H. R.

A. Das, S. Pisana, B. Chakraborty, S. Piscanec, S. K. Saha, U. V. Waghmare, K. S. Novoselov, H. R. Krishnamurthy, A. K. Geim, A. C. Ferrari, and A. K. Sood, “Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor,” Nat. Nanotechnol. 3, 210–215 (2008).
[Crossref]

Kuehn, S.

M. Breusing, S. Kuehn, T. Winzer, E. Malić, F. Milde, N. Severin, J. P. Rabe, C. Ropers, A. Knorr, and T. Elsaesser, “Ultrafast nonequilibrium carrier dynamics in a single graphene layer,” Phys. Rev. B 83, 153410 (2011).
[Crossref]

Lai, T. S.

K. Chen, M. N. Yogeesh, Y. Huang, S. Q. Zhang, F. He, X. H. Meng, S. Y. Fang, N. Sheehan, T. H. Tao, S. R. Bank, J. H. Lin, D. Akinwande, P. Sutter, T. S. Lai, and Y. G. Wang, “Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique,” Carbon 107, 233–239 (2016).
[Crossref]

K. Chen, H. H. Li, L.-P. Ma, W. C. Ren, T.-F. Chung, H.-M. Cheng, Y. P. Chen, and T. S. Lai, “Diversity of ultrafast hot-carrier-induced dynamics and striking sub-femtosecond hot-carrier scattering times in graphene,” Carbon 72, 402–409 (2014).
[Crossref]

K. Chen, W. F. Wang, J. M. Chen, J. H. Wen, and T. S. Lai, “A transmission-grating-modulated pump-probe absorption spectroscopy and demonstration of diffusion dynamics of photoexcited carriers in bulk intrinsic GaAs film,” Opt. Express 20, 3580–3585 (2012).
[Crossref]

Lanzara, A.

H. Choi, F. Borondics, D. A. Siegel, S. Y. Zhou, M. C. Martin, A. Lanzara, and R. A. Kaindl, “Broadband electromagnetic response and ultrafast dynamics of few-layer epitaxial graphene,” Appl. Phys. Lett. 94, 172102 (2009).
[Crossref]

Leconte, N.

N. Leconte, J. Moser, P. Ordejón, H. H. Tao, A. Lherbier, A. Bachtold, F. Alsina, C. M. S. Torres, J.-C. Charlier, and S. Roche, “Damaging graphene with ozone treatment: a chemically tunable metal-insulator transition,” ACS Nano 4, 4033–4038 (2010).
[Crossref]

Lee, J.

K. M. Dani, J. Lee, R. Sharma, A. D. Mohite, C. M. Galande, P. M. Ajayan, A. M. Dattelbaum, H. Htoon, A. J. Taylor, and R. P. Prasankumar, “Intraband conductivity response in graphene observed using ultrafast infrared-pump visible-probe spectroscopy,” Phys. Rev. B 86, 125403 (2012).
[Crossref]

Lherbier, A.

N. Leconte, J. Moser, P. Ordejón, H. H. Tao, A. Lherbier, A. Bachtold, F. Alsina, C. M. S. Torres, J.-C. Charlier, and S. Roche, “Damaging graphene with ozone treatment: a chemically tunable metal-insulator transition,” ACS Nano 4, 4033–4038 (2010).
[Crossref]

Li, H. H.

K. Chen, H. H. Li, L.-P. Ma, W. C. Ren, T.-F. Chung, H.-M. Cheng, Y. P. Chen, and T. S. Lai, “Diversity of ultrafast hot-carrier-induced dynamics and striking sub-femtosecond hot-carrier scattering times in graphene,” Carbon 72, 402–409 (2014).
[Crossref]

Li, L.

Li, T.

T. Li, L. Luo, M. Hupalo, J. Zhang, M. C. Tringides, J. Schmalian, and J. Wang, “Femtosecond population inversion and stimulated emission of dense Dirac fermions in graphene,” Phys. Rev. Lett. 108, 167401 (2012).
[Crossref]

Li, X. B.

D. Sun, Z. K. Wu, C. Divin, X. B. Li, C. Berger, W. A. De Heer, P. N. First, and T. B. Norris, “Ultrafast relaxation of excited Dirac fermions in epitaxial graphene using optical differential transmission spectroscopy,” Phys. Rev. Lett. 101, 157402 (2008).
[Crossref]

Lian, C. X.

L. B. Huang, G. V. Hartland, L.-Q. Chu, Luxmi, R. M. Feenstra, C. X. Lian, K. Tahy, and H. Xing, “Ultrafast transient absorption microscopy studies of carrier dynamics in epitaxial graphene,” Nano Lett. 10, 1308–1313 (2010).
[Crossref]

Lin, J. H.

K. Chen, M. N. Yogeesh, Y. Huang, S. Q. Zhang, F. He, X. H. Meng, S. Y. Fang, N. Sheehan, T. H. Tao, S. R. Bank, J. H. Lin, D. Akinwande, P. Sutter, T. S. Lai, and Y. G. Wang, “Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique,” Carbon 107, 233–239 (2016).
[Crossref]

Lin, J. Y.

J. Z. Shang, T. Yu, J. Y. Lin, and G. G. Gurzadyan, “Ultrafast electron-optical phonon scattering and quasiparticle lifetime in CVD-grown graphene,” ACS Nano 5, 3278–3283 (2011).
[Crossref]

J. Z. Shang, Z. Q. Luo, C. X. Cong, J. Y. Lin, T. Yu, and G. G. Gurzadyan, “Femtosecond UV-pump/visible-probe measurements of carrier dynamics in stacked graphene films,” Appl. Phys. Lett. 97, 163103 (2010).
[Crossref]

Lin, Y.-M.

F. Xia, T. Mueller, Y.-M. Lin, A. Valdes-Garcia, and P. Avouris, “Ultrafast graphene photodetector,” Nat. Nanotechnol. 4, 839–843 (2009).
[Crossref]

Liu, Z. B.

X. Zhao, Z. B. Liu, W. B. Yan, Y. P. Wu, X. L. Zhang, Y. S. Chen, and J. G. Tian, “Ultrafast carrier dynamics and saturable absorption of solution-processable few-layered graphene oxide,” Appl. Phys. Lett. 98, 121905 (2011).
[Crossref]

Loh, K. P.

Y. F. Song, L. Li, H. Zhang, D. Y. Shen, D. Y. Tang, and K. P. Loh, “Vector multi-soliton operation and interaction in a graphene mode-locked fiber laser,” Opt. Express 21, 10010–10018 (2013).
[Crossref]

B. A. Ruzicka, L. K. Werake, H. Zhao, S. Wang, and K. P. Loh, “Femtosecond pump-probe studies of reduced graphene oxide thin films,” Appl. Phys. Lett. 96, 173106 (2010).
[Crossref]

Luo, L.

T. Li, L. Luo, M. Hupalo, J. Zhang, M. C. Tringides, J. Schmalian, and J. Wang, “Femtosecond population inversion and stimulated emission of dense Dirac fermions in graphene,” Phys. Rev. Lett. 108, 167401 (2012).
[Crossref]

Luo, Z. Q.

J. Z. Shang, Z. Q. Luo, C. X. Cong, J. Y. Lin, T. Yu, and G. G. Gurzadyan, “Femtosecond UV-pump/visible-probe measurements of carrier dynamics in stacked graphene films,” Appl. Phys. Lett. 97, 163103 (2010).
[Crossref]

Luxmi,

L. B. Huang, G. V. Hartland, L.-Q. Chu, Luxmi, R. M. Feenstra, C. X. Lian, K. Tahy, and H. Xing, “Ultrafast transient absorption microscopy studies of carrier dynamics in epitaxial graphene,” Nano Lett. 10, 1308–1313 (2010).
[Crossref]

Ma, L.-P.

K. Chen, H. H. Li, L.-P. Ma, W. C. Ren, T.-F. Chung, H.-M. Cheng, Y. P. Chen, and T. S. Lai, “Diversity of ultrafast hot-carrier-induced dynamics and striking sub-femtosecond hot-carrier scattering times in graphene,” Carbon 72, 402–409 (2014).
[Crossref]

J. T. Yuan, L.-P. Ma, S. F. Pei, J. H. Du, Y. Su, W. C. Ren, and H.-M. Cheng, “Tuning the electrical and optical properties of graphene by ozone treatment for patterning monolithic transparent electrodes,” ACS Nano 7, 4233–4241 (2013).
[Crossref]

L. B. Gao, W. C. Ren, J. P. Zhao, L.-P. Ma, Z. P. Chen, and H.-M. Cheng, “Efficient growth of high-quality graphene films on Cu foils by ambient pressure chemical vapor deposition,” Appl. Phys. Lett. 97, 183109 (2010).
[Crossref]

Malic, E.

M. Breusing, S. Kuehn, T. Winzer, E. Malić, F. Milde, N. Severin, J. P. Rabe, C. Ropers, A. Knorr, and T. Elsaesser, “Ultrafast nonequilibrium carrier dynamics in a single graphene layer,” Phys. Rev. B 83, 153410 (2011).
[Crossref]

Martin, M. C.

H. Choi, F. Borondics, D. A. Siegel, S. Y. Zhou, M. C. Martin, A. Lanzara, and R. A. Kaindl, “Broadband electromagnetic response and ultrafast dynamics of few-layer epitaxial graphene,” Appl. Phys. Lett. 94, 172102 (2009).
[Crossref]

Meng, X. H.

K. Chen, M. N. Yogeesh, Y. Huang, S. Q. Zhang, F. He, X. H. Meng, S. Y. Fang, N. Sheehan, T. H. Tao, S. R. Bank, J. H. Lin, D. Akinwande, P. Sutter, T. S. Lai, and Y. G. Wang, “Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique,” Carbon 107, 233–239 (2016).
[Crossref]

Milde, F.

M. Breusing, S. Kuehn, T. Winzer, E. Malić, F. Milde, N. Severin, J. P. Rabe, C. Ropers, A. Knorr, and T. Elsaesser, “Ultrafast nonequilibrium carrier dynamics in a single graphene layer,” Phys. Rev. B 83, 153410 (2011).
[Crossref]

Mohite, A. D.

K. M. Dani, J. Lee, R. Sharma, A. D. Mohite, C. M. Galande, P. M. Ajayan, A. M. Dattelbaum, H. Htoon, A. J. Taylor, and R. P. Prasankumar, “Intraband conductivity response in graphene observed using ultrafast infrared-pump visible-probe spectroscopy,” Phys. Rev. B 86, 125403 (2012).
[Crossref]

Moser, J.

N. Leconte, J. Moser, P. Ordejón, H. H. Tao, A. Lherbier, A. Bachtold, F. Alsina, C. M. S. Torres, J.-C. Charlier, and S. Roche, “Damaging graphene with ozone treatment: a chemically tunable metal-insulator transition,” ACS Nano 4, 4033–4038 (2010).
[Crossref]

Mueller, T.

F. Xia, T. Mueller, Y.-M. Lin, A. Valdes-Garcia, and P. Avouris, “Ultrafast graphene photodetector,” Nat. Nanotechnol. 4, 839–843 (2009).
[Crossref]

Mulyana, Y. N.

Y. N. Mulyana, M. Uenuma, Y. Ishikawa, and Y. H. Uraoka, “Reversible oxidation of graphene through ultraviolet/ozone treatment and its nonthermal reduction through ultraviolet irradiation,” J. Phys. Chem. C 118, 27372–27381 (2014).
[Crossref]

Nam, J.-M.

S. Huh, J. Park, Y. S. Kim, K. S. Kim, B. H. Hong, and J.-M. Nam, “UV/ozone-oxidized large-scale graphene platform with large chemical enhancement in surface-enhanced Raman scattering,” ACS Nano 5, 9799–9806 (2011).
[Crossref]

Newson, R. W.

Norris, T. B.

D. Sun, Z. K. Wu, C. Divin, X. B. Li, C. Berger, W. A. De Heer, P. N. First, and T. B. Norris, “Ultrafast relaxation of excited Dirac fermions in epitaxial graphene using optical differential transmission spectroscopy,” Phys. Rev. Lett. 101, 157402 (2008).
[Crossref]

Novoselov, K. S.

A. Das, S. Pisana, B. Chakraborty, S. Piscanec, S. K. Saha, U. V. Waghmare, K. S. Novoselov, H. R. Krishnamurthy, A. K. Geim, A. C. Ferrari, and A. K. Sood, “Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor,” Nat. Nanotechnol. 3, 210–215 (2008).
[Crossref]

Ordejón, P.

N. Leconte, J. Moser, P. Ordejón, H. H. Tao, A. Lherbier, A. Bachtold, F. Alsina, C. M. S. Torres, J.-C. Charlier, and S. Roche, “Damaging graphene with ozone treatment: a chemically tunable metal-insulator transition,” ACS Nano 4, 4033–4038 (2010).
[Crossref]

Park, J.

S. Huh, J. Park, Y. S. Kim, K. S. Kim, B. H. Hong, and J.-M. Nam, “UV/ozone-oxidized large-scale graphene platform with large chemical enhancement in surface-enhanced Raman scattering,” ACS Nano 5, 9799–9806 (2011).
[Crossref]

H. N. Wang, J. H. Strait, P. A. George, S. Shivaraman, V. B. Shields, M. Chandrashekhar, J. Hwang, F. Rana, M. G. Spencer, C. S. Ruiz-Vargas, and J. Park, “Ultrafast relaxation dynamics of hot optical phonons in graphene,” Appl. Phys. Lett. 96, 081917 (2010).
[Crossref]

Pei, S. F.

J. T. Yuan, L.-P. Ma, S. F. Pei, J. H. Du, Y. Su, W. C. Ren, and H.-M. Cheng, “Tuning the electrical and optical properties of graphene by ozone treatment for patterning monolithic transparent electrodes,” ACS Nano 7, 4233–4241 (2013).
[Crossref]

Pisana, S.

A. Das, S. Pisana, B. Chakraborty, S. Piscanec, S. K. Saha, U. V. Waghmare, K. S. Novoselov, H. R. Krishnamurthy, A. K. Geim, A. C. Ferrari, and A. K. Sood, “Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor,” Nat. Nanotechnol. 3, 210–215 (2008).
[Crossref]

Piscanec, S.

A. Das, S. Pisana, B. Chakraborty, S. Piscanec, S. K. Saha, U. V. Waghmare, K. S. Novoselov, H. R. Krishnamurthy, A. K. Geim, A. C. Ferrari, and A. K. Sood, “Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor,” Nat. Nanotechnol. 3, 210–215 (2008).
[Crossref]

Prasankumar, R. P.

K. M. Dani, J. Lee, R. Sharma, A. D. Mohite, C. M. Galande, P. M. Ajayan, A. M. Dattelbaum, H. Htoon, A. J. Taylor, and R. P. Prasankumar, “Intraband conductivity response in graphene observed using ultrafast infrared-pump visible-probe spectroscopy,” Phys. Rev. B 86, 125403 (2012).
[Crossref]

Rabe, J. P.

M. Breusing, S. Kuehn, T. Winzer, E. Malić, F. Milde, N. Severin, J. P. Rabe, C. Ropers, A. Knorr, and T. Elsaesser, “Ultrafast nonequilibrium carrier dynamics in a single graphene layer,” Phys. Rev. B 83, 153410 (2011).
[Crossref]

Rana, F.

H. N. Wang, J. H. Strait, P. A. George, S. Shivaraman, V. B. Shields, M. Chandrashekhar, J. Hwang, F. Rana, M. G. Spencer, C. S. Ruiz-Vargas, and J. Park, “Ultrafast relaxation dynamics of hot optical phonons in graphene,” Appl. Phys. Lett. 96, 081917 (2010).
[Crossref]

J. M. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. G. Spencer, “Measurement of ultrafast carrier dynamics in epitaxial graphene,” Appl. Phys. Lett. 92, 042116 (2008).
[Crossref]

P. A. George, J. Strait, J. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. G. Spencer, “Ultrafast optical-pump THz-probe spectroscopy of the carrier relaxation and recombination dynamics in epitaxial graphene,” Nano Lett. 8, 4248–4251 (2008).
[Crossref]

Ren, W. C.

K. Chen, H. H. Li, L.-P. Ma, W. C. Ren, T.-F. Chung, H.-M. Cheng, Y. P. Chen, and T. S. Lai, “Diversity of ultrafast hot-carrier-induced dynamics and striking sub-femtosecond hot-carrier scattering times in graphene,” Carbon 72, 402–409 (2014).
[Crossref]

J. T. Yuan, L.-P. Ma, S. F. Pei, J. H. Du, Y. Su, W. C. Ren, and H.-M. Cheng, “Tuning the electrical and optical properties of graphene by ozone treatment for patterning monolithic transparent electrodes,” ACS Nano 7, 4233–4241 (2013).
[Crossref]

L. B. Gao, W. C. Ren, J. P. Zhao, L.-P. Ma, Z. P. Chen, and H.-M. Cheng, “Efficient growth of high-quality graphene films on Cu foils by ambient pressure chemical vapor deposition,” Appl. Phys. Lett. 97, 183109 (2010).
[Crossref]

Roche, S.

N. Leconte, J. Moser, P. Ordejón, H. H. Tao, A. Lherbier, A. Bachtold, F. Alsina, C. M. S. Torres, J.-C. Charlier, and S. Roche, “Damaging graphene with ozone treatment: a chemically tunable metal-insulator transition,” ACS Nano 4, 4033–4038 (2010).
[Crossref]

Ropers, C.

M. Breusing, S. Kuehn, T. Winzer, E. Malić, F. Milde, N. Severin, J. P. Rabe, C. Ropers, A. Knorr, and T. Elsaesser, “Ultrafast nonequilibrium carrier dynamics in a single graphene layer,” Phys. Rev. B 83, 153410 (2011).
[Crossref]

Ruiz-Vargas, C. S.

H. N. Wang, J. H. Strait, P. A. George, S. Shivaraman, V. B. Shields, M. Chandrashekhar, J. Hwang, F. Rana, M. G. Spencer, C. S. Ruiz-Vargas, and J. Park, “Ultrafast relaxation dynamics of hot optical phonons in graphene,” Appl. Phys. Lett. 96, 081917 (2010).
[Crossref]

Ruzicka, B. A.

B. A. Ruzicka, L. K. Werake, H. Zhao, S. Wang, and K. P. Loh, “Femtosecond pump-probe studies of reduced graphene oxide thin films,” Appl. Phys. Lett. 96, 173106 (2010).
[Crossref]

Saha, S. K.

A. Das, S. Pisana, B. Chakraborty, S. Piscanec, S. K. Saha, U. V. Waghmare, K. S. Novoselov, H. R. Krishnamurthy, A. K. Geim, A. C. Ferrari, and A. K. Sood, “Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor,” Nat. Nanotechnol. 3, 210–215 (2008).
[Crossref]

Schmalian, J.

T. Li, L. Luo, M. Hupalo, J. Zhang, M. C. Tringides, J. Schmalian, and J. Wang, “Femtosecond population inversion and stimulated emission of dense Dirac fermions in graphene,” Phys. Rev. Lett. 108, 167401 (2012).
[Crossref]

Schmidt, B.

Severin, N.

M. Breusing, S. Kuehn, T. Winzer, E. Malić, F. Milde, N. Severin, J. P. Rabe, C. Ropers, A. Knorr, and T. Elsaesser, “Ultrafast nonequilibrium carrier dynamics in a single graphene layer,” Phys. Rev. B 83, 153410 (2011).
[Crossref]

Shang, J. Z.

J. Z. Shang, T. Yu, J. Y. Lin, and G. G. Gurzadyan, “Ultrafast electron-optical phonon scattering and quasiparticle lifetime in CVD-grown graphene,” ACS Nano 5, 3278–3283 (2011).
[Crossref]

J. Z. Shang, Z. Q. Luo, C. X. Cong, J. Y. Lin, T. Yu, and G. G. Gurzadyan, “Femtosecond UV-pump/visible-probe measurements of carrier dynamics in stacked graphene films,” Appl. Phys. Lett. 97, 163103 (2010).
[Crossref]

Sharma, R.

K. M. Dani, J. Lee, R. Sharma, A. D. Mohite, C. M. Galande, P. M. Ajayan, A. M. Dattelbaum, H. Htoon, A. J. Taylor, and R. P. Prasankumar, “Intraband conductivity response in graphene observed using ultrafast infrared-pump visible-probe spectroscopy,” Phys. Rev. B 86, 125403 (2012).
[Crossref]

Sheehan, N.

K. Chen, M. N. Yogeesh, Y. Huang, S. Q. Zhang, F. He, X. H. Meng, S. Y. Fang, N. Sheehan, T. H. Tao, S. R. Bank, J. H. Lin, D. Akinwande, P. Sutter, T. S. Lai, and Y. G. Wang, “Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique,” Carbon 107, 233–239 (2016).
[Crossref]

Shen, D. Y.

Shields, V. B.

H. N. Wang, J. H. Strait, P. A. George, S. Shivaraman, V. B. Shields, M. Chandrashekhar, J. Hwang, F. Rana, M. G. Spencer, C. S. Ruiz-Vargas, and J. Park, “Ultrafast relaxation dynamics of hot optical phonons in graphene,” Appl. Phys. Lett. 96, 081917 (2010).
[Crossref]

Shivaraman, S.

H. N. Wang, J. H. Strait, P. A. George, S. Shivaraman, V. B. Shields, M. Chandrashekhar, J. Hwang, F. Rana, M. G. Spencer, C. S. Ruiz-Vargas, and J. Park, “Ultrafast relaxation dynamics of hot optical phonons in graphene,” Appl. Phys. Lett. 96, 081917 (2010).
[Crossref]

J. M. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. G. Spencer, “Measurement of ultrafast carrier dynamics in epitaxial graphene,” Appl. Phys. Lett. 92, 042116 (2008).
[Crossref]

P. A. George, J. Strait, J. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. G. Spencer, “Ultrafast optical-pump THz-probe spectroscopy of the carrier relaxation and recombination dynamics in epitaxial graphene,” Nano Lett. 8, 4248–4251 (2008).
[Crossref]

Siegel, D. A.

H. Choi, F. Borondics, D. A. Siegel, S. Y. Zhou, M. C. Martin, A. Lanzara, and R. A. Kaindl, “Broadband electromagnetic response and ultrafast dynamics of few-layer epitaxial graphene,” Appl. Phys. Lett. 94, 172102 (2009).
[Crossref]

Song, Y. F.

Sood, A. K.

A. Das, S. Pisana, B. Chakraborty, S. Piscanec, S. K. Saha, U. V. Waghmare, K. S. Novoselov, H. R. Krishnamurthy, A. K. Geim, A. C. Ferrari, and A. K. Sood, “Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor,” Nat. Nanotechnol. 3, 210–215 (2008).
[Crossref]

Spencer, M. G.

H. N. Wang, J. H. Strait, P. A. George, S. Shivaraman, V. B. Shields, M. Chandrashekhar, J. Hwang, F. Rana, M. G. Spencer, C. S. Ruiz-Vargas, and J. Park, “Ultrafast relaxation dynamics of hot optical phonons in graphene,” Appl. Phys. Lett. 96, 081917 (2010).
[Crossref]

J. M. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. G. Spencer, “Measurement of ultrafast carrier dynamics in epitaxial graphene,” Appl. Phys. Lett. 92, 042116 (2008).
[Crossref]

P. A. George, J. Strait, J. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. G. Spencer, “Ultrafast optical-pump THz-probe spectroscopy of the carrier relaxation and recombination dynamics in epitaxial graphene,” Nano Lett. 8, 4248–4251 (2008).
[Crossref]

Strait, J.

P. A. George, J. Strait, J. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. G. Spencer, “Ultrafast optical-pump THz-probe spectroscopy of the carrier relaxation and recombination dynamics in epitaxial graphene,” Nano Lett. 8, 4248–4251 (2008).
[Crossref]

Strait, J. H.

H. N. Wang, J. H. Strait, P. A. George, S. Shivaraman, V. B. Shields, M. Chandrashekhar, J. Hwang, F. Rana, M. G. Spencer, C. S. Ruiz-Vargas, and J. Park, “Ultrafast relaxation dynamics of hot optical phonons in graphene,” Appl. Phys. Lett. 96, 081917 (2010).
[Crossref]

Su, Y.

J. T. Yuan, L.-P. Ma, S. F. Pei, J. H. Du, Y. Su, W. C. Ren, and H.-M. Cheng, “Tuning the electrical and optical properties of graphene by ozone treatment for patterning monolithic transparent electrodes,” ACS Nano 7, 4233–4241 (2013).
[Crossref]

Sun, D.

D. Sun, Z. K. Wu, C. Divin, X. B. Li, C. Berger, W. A. De Heer, P. N. First, and T. B. Norris, “Ultrafast relaxation of excited Dirac fermions in epitaxial graphene using optical differential transmission spectroscopy,” Phys. Rev. Lett. 101, 157402 (2008).
[Crossref]

Sutter, P.

K. Chen, M. N. Yogeesh, Y. Huang, S. Q. Zhang, F. He, X. H. Meng, S. Y. Fang, N. Sheehan, T. H. Tao, S. R. Bank, J. H. Lin, D. Akinwande, P. Sutter, T. S. Lai, and Y. G. Wang, “Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique,” Carbon 107, 233–239 (2016).
[Crossref]

Tahy, K.

L. B. Huang, G. V. Hartland, L.-Q. Chu, Luxmi, R. M. Feenstra, C. X. Lian, K. Tahy, and H. Xing, “Ultrafast transient absorption microscopy studies of carrier dynamics in epitaxial graphene,” Nano Lett. 10, 1308–1313 (2010).
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Tanaka, K.

S. Tani, F. Blanchard, and K. Tanaka, “Ultrafast carrier dynamics under a high electric field,” Phys. Rev. Lett. 109, 166603 (2012).
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Tang, D. Y.

Tani, S.

S. Tani, F. Blanchard, and K. Tanaka, “Ultrafast carrier dynamics under a high electric field,” Phys. Rev. Lett. 109, 166603 (2012).
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Tao, H. H.

N. Leconte, J. Moser, P. Ordejón, H. H. Tao, A. Lherbier, A. Bachtold, F. Alsina, C. M. S. Torres, J.-C. Charlier, and S. Roche, “Damaging graphene with ozone treatment: a chemically tunable metal-insulator transition,” ACS Nano 4, 4033–4038 (2010).
[Crossref]

Tao, T. H.

K. Chen, M. N. Yogeesh, Y. Huang, S. Q. Zhang, F. He, X. H. Meng, S. Y. Fang, N. Sheehan, T. H. Tao, S. R. Bank, J. H. Lin, D. Akinwande, P. Sutter, T. S. Lai, and Y. G. Wang, “Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique,” Carbon 107, 233–239 (2016).
[Crossref]

Taylor, A. J.

K. M. Dani, J. Lee, R. Sharma, A. D. Mohite, C. M. Galande, P. M. Ajayan, A. M. Dattelbaum, H. Htoon, A. J. Taylor, and R. P. Prasankumar, “Intraband conductivity response in graphene observed using ultrafast infrared-pump visible-probe spectroscopy,” Phys. Rev. B 86, 125403 (2012).
[Crossref]

Tian, J. G.

X. Zhao, Z. B. Liu, W. B. Yan, Y. P. Wu, X. L. Zhang, Y. S. Chen, and J. G. Tian, “Ultrafast carrier dynamics and saturable absorption of solution-processable few-layered graphene oxide,” Appl. Phys. Lett. 98, 121905 (2011).
[Crossref]

Torres, C. M. S.

N. Leconte, J. Moser, P. Ordejón, H. H. Tao, A. Lherbier, A. Bachtold, F. Alsina, C. M. S. Torres, J.-C. Charlier, and S. Roche, “Damaging graphene with ozone treatment: a chemically tunable metal-insulator transition,” ACS Nano 4, 4033–4038 (2010).
[Crossref]

Tringides, M. C.

T. Li, L. Luo, M. Hupalo, J. Zhang, M. C. Tringides, J. Schmalian, and J. Wang, “Femtosecond population inversion and stimulated emission of dense Dirac fermions in graphene,” Phys. Rev. Lett. 108, 167401 (2012).
[Crossref]

Uenuma, M.

Y. N. Mulyana, M. Uenuma, Y. Ishikawa, and Y. H. Uraoka, “Reversible oxidation of graphene through ultraviolet/ozone treatment and its nonthermal reduction through ultraviolet irradiation,” J. Phys. Chem. C 118, 27372–27381 (2014).
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Uraoka, Y. H.

Y. N. Mulyana, M. Uenuma, Y. Ishikawa, and Y. H. Uraoka, “Reversible oxidation of graphene through ultraviolet/ozone treatment and its nonthermal reduction through ultraviolet irradiation,” J. Phys. Chem. C 118, 27372–27381 (2014).
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Valdes-Garcia, A.

F. Xia, T. Mueller, Y.-M. Lin, A. Valdes-Garcia, and P. Avouris, “Ultrafast graphene photodetector,” Nat. Nanotechnol. 4, 839–843 (2009).
[Crossref]

van Driel, H. M.

Waghmare, U. V.

A. Das, S. Pisana, B. Chakraborty, S. Piscanec, S. K. Saha, U. V. Waghmare, K. S. Novoselov, H. R. Krishnamurthy, A. K. Geim, A. C. Ferrari, and A. K. Sood, “Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor,” Nat. Nanotechnol. 3, 210–215 (2008).
[Crossref]

Wang, H. N.

H. N. Wang, J. H. Strait, P. A. George, S. Shivaraman, V. B. Shields, M. Chandrashekhar, J. Hwang, F. Rana, M. G. Spencer, C. S. Ruiz-Vargas, and J. Park, “Ultrafast relaxation dynamics of hot optical phonons in graphene,” Appl. Phys. Lett. 96, 081917 (2010).
[Crossref]

Wang, J.

T. Li, L. Luo, M. Hupalo, J. Zhang, M. C. Tringides, J. Schmalian, and J. Wang, “Femtosecond population inversion and stimulated emission of dense Dirac fermions in graphene,” Phys. Rev. Lett. 108, 167401 (2012).
[Crossref]

Wang, S.

B. A. Ruzicka, L. K. Werake, H. Zhao, S. Wang, and K. P. Loh, “Femtosecond pump-probe studies of reduced graphene oxide thin films,” Appl. Phys. Lett. 96, 173106 (2010).
[Crossref]

Wang, W. F.

Wang, Y. G.

K. Chen, M. N. Yogeesh, Y. Huang, S. Q. Zhang, F. He, X. H. Meng, S. Y. Fang, N. Sheehan, T. H. Tao, S. R. Bank, J. H. Lin, D. Akinwande, P. Sutter, T. S. Lai, and Y. G. Wang, “Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique,” Carbon 107, 233–239 (2016).
[Crossref]

Wen, J. H.

Werake, L. K.

B. A. Ruzicka, L. K. Werake, H. Zhao, S. Wang, and K. P. Loh, “Femtosecond pump-probe studies of reduced graphene oxide thin films,” Appl. Phys. Lett. 96, 173106 (2010).
[Crossref]

Winzer, T.

M. Breusing, S. Kuehn, T. Winzer, E. Malić, F. Milde, N. Severin, J. P. Rabe, C. Ropers, A. Knorr, and T. Elsaesser, “Ultrafast nonequilibrium carrier dynamics in a single graphene layer,” Phys. Rev. B 83, 153410 (2011).
[Crossref]

Wu, Y. P.

X. Zhao, Z. B. Liu, W. B. Yan, Y. P. Wu, X. L. Zhang, Y. S. Chen, and J. G. Tian, “Ultrafast carrier dynamics and saturable absorption of solution-processable few-layered graphene oxide,” Appl. Phys. Lett. 98, 121905 (2011).
[Crossref]

Wu, Z. K.

D. Sun, Z. K. Wu, C. Divin, X. B. Li, C. Berger, W. A. De Heer, P. N. First, and T. B. Norris, “Ultrafast relaxation of excited Dirac fermions in epitaxial graphene using optical differential transmission spectroscopy,” Phys. Rev. Lett. 101, 157402 (2008).
[Crossref]

Xia, F.

F. Xia, T. Mueller, Y.-M. Lin, A. Valdes-Garcia, and P. Avouris, “Ultrafast graphene photodetector,” Nat. Nanotechnol. 4, 839–843 (2009).
[Crossref]

Xing, H.

L. B. Huang, G. V. Hartland, L.-Q. Chu, Luxmi, R. M. Feenstra, C. X. Lian, K. Tahy, and H. Xing, “Ultrafast transient absorption microscopy studies of carrier dynamics in epitaxial graphene,” Nano Lett. 10, 1308–1313 (2010).
[Crossref]

Xing, H. L.

L. B. Huang, B. Gao, G. Hartland, M. Kelly, and H. L. Xing, “Ultrafast relaxation of hot optical phonons in monolayer and multilayer graphene on different substrates,” Sur. Sci. 605, 1657–1661 (2011).
[Crossref]

B. Gao, G. Hartland, T. Fang, M. Kelly, D. Jena, H. L. Xing, and L. B. Huang, “Studies of intrinsic hot phonon dynamics in suspended graphene by transient absorption microscopy,” Nano Lett. 11, 3184–3189 (2011).
[Crossref]

Yan, W. B.

X. Zhao, Z. B. Liu, W. B. Yan, Y. P. Wu, X. L. Zhang, Y. S. Chen, and J. G. Tian, “Ultrafast carrier dynamics and saturable absorption of solution-processable few-layered graphene oxide,” Appl. Phys. Lett. 98, 121905 (2011).
[Crossref]

Yogeesh, M. N.

K. Chen, M. N. Yogeesh, Y. Huang, S. Q. Zhang, F. He, X. H. Meng, S. Y. Fang, N. Sheehan, T. H. Tao, S. R. Bank, J. H. Lin, D. Akinwande, P. Sutter, T. S. Lai, and Y. G. Wang, “Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique,” Carbon 107, 233–239 (2016).
[Crossref]

Yu, T.

J. Z. Shang, T. Yu, J. Y. Lin, and G. G. Gurzadyan, “Ultrafast electron-optical phonon scattering and quasiparticle lifetime in CVD-grown graphene,” ACS Nano 5, 3278–3283 (2011).
[Crossref]

J. Z. Shang, Z. Q. Luo, C. X. Cong, J. Y. Lin, T. Yu, and G. G. Gurzadyan, “Femtosecond UV-pump/visible-probe measurements of carrier dynamics in stacked graphene films,” Appl. Phys. Lett. 97, 163103 (2010).
[Crossref]

Yuan, J. T.

J. T. Yuan, L.-P. Ma, S. F. Pei, J. H. Du, Y. Su, W. C. Ren, and H.-M. Cheng, “Tuning the electrical and optical properties of graphene by ozone treatment for patterning monolithic transparent electrodes,” ACS Nano 7, 4233–4241 (2013).
[Crossref]

Zhang, H.

Zhang, J.

T. Li, L. Luo, M. Hupalo, J. Zhang, M. C. Tringides, J. Schmalian, and J. Wang, “Femtosecond population inversion and stimulated emission of dense Dirac fermions in graphene,” Phys. Rev. Lett. 108, 167401 (2012).
[Crossref]

Zhang, S. Q.

K. Chen, M. N. Yogeesh, Y. Huang, S. Q. Zhang, F. He, X. H. Meng, S. Y. Fang, N. Sheehan, T. H. Tao, S. R. Bank, J. H. Lin, D. Akinwande, P. Sutter, T. S. Lai, and Y. G. Wang, “Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique,” Carbon 107, 233–239 (2016).
[Crossref]

Zhang, X. L.

X. Zhao, Z. B. Liu, W. B. Yan, Y. P. Wu, X. L. Zhang, Y. S. Chen, and J. G. Tian, “Ultrafast carrier dynamics and saturable absorption of solution-processable few-layered graphene oxide,” Appl. Phys. Lett. 98, 121905 (2011).
[Crossref]

Zhao, H.

B. A. Ruzicka, L. K. Werake, H. Zhao, S. Wang, and K. P. Loh, “Femtosecond pump-probe studies of reduced graphene oxide thin films,” Appl. Phys. Lett. 96, 173106 (2010).
[Crossref]

Zhao, J. P.

L. B. Gao, W. C. Ren, J. P. Zhao, L.-P. Ma, Z. P. Chen, and H.-M. Cheng, “Efficient growth of high-quality graphene films on Cu foils by ambient pressure chemical vapor deposition,” Appl. Phys. Lett. 97, 183109 (2010).
[Crossref]

Zhao, X.

X. Zhao, Z. B. Liu, W. B. Yan, Y. P. Wu, X. L. Zhang, Y. S. Chen, and J. G. Tian, “Ultrafast carrier dynamics and saturable absorption of solution-processable few-layered graphene oxide,” Appl. Phys. Lett. 98, 121905 (2011).
[Crossref]

Zhou, S. Y.

H. Choi, F. Borondics, D. A. Siegel, S. Y. Zhou, M. C. Martin, A. Lanzara, and R. A. Kaindl, “Broadband electromagnetic response and ultrafast dynamics of few-layer epitaxial graphene,” Appl. Phys. Lett. 94, 172102 (2009).
[Crossref]

ACS Nano (4)

J. Z. Shang, T. Yu, J. Y. Lin, and G. G. Gurzadyan, “Ultrafast electron-optical phonon scattering and quasiparticle lifetime in CVD-grown graphene,” ACS Nano 5, 3278–3283 (2011).
[Crossref]

S. Huh, J. Park, Y. S. Kim, K. S. Kim, B. H. Hong, and J.-M. Nam, “UV/ozone-oxidized large-scale graphene platform with large chemical enhancement in surface-enhanced Raman scattering,” ACS Nano 5, 9799–9806 (2011).
[Crossref]

N. Leconte, J. Moser, P. Ordejón, H. H. Tao, A. Lherbier, A. Bachtold, F. Alsina, C. M. S. Torres, J.-C. Charlier, and S. Roche, “Damaging graphene with ozone treatment: a chemically tunable metal-insulator transition,” ACS Nano 4, 4033–4038 (2010).
[Crossref]

J. T. Yuan, L.-P. Ma, S. F. Pei, J. H. Du, Y. Su, W. C. Ren, and H.-M. Cheng, “Tuning the electrical and optical properties of graphene by ozone treatment for patterning monolithic transparent electrodes,” ACS Nano 7, 4233–4241 (2013).
[Crossref]

Appl. Phys. Lett. (7)

L. B. Gao, W. C. Ren, J. P. Zhao, L.-P. Ma, Z. P. Chen, and H.-M. Cheng, “Efficient growth of high-quality graphene films on Cu foils by ambient pressure chemical vapor deposition,” Appl. Phys. Lett. 97, 183109 (2010).
[Crossref]

J. Z. Shang, Z. Q. Luo, C. X. Cong, J. Y. Lin, T. Yu, and G. G. Gurzadyan, “Femtosecond UV-pump/visible-probe measurements of carrier dynamics in stacked graphene films,” Appl. Phys. Lett. 97, 163103 (2010).
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Appl. Surf. Sci. (1)

A. I. Aria, A. W. Gani, and M. Gharib, “Effect of dry oxidation on the energy gap and chemical composition of CVD graphene on nickel,” Appl. Surf. Sci. 293, 1–11 (2014).
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Carbon (2)

K. Chen, H. H. Li, L.-P. Ma, W. C. Ren, T.-F. Chung, H.-M. Cheng, Y. P. Chen, and T. S. Lai, “Diversity of ultrafast hot-carrier-induced dynamics and striking sub-femtosecond hot-carrier scattering times in graphene,” Carbon 72, 402–409 (2014).
[Crossref]

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Sur. Sci. (1)

L. B. Huang, B. Gao, G. Hartland, M. Kelly, and H. L. Xing, “Ultrafast relaxation of hot optical phonons in monolayer and multilayer graphene on different substrates,” Sur. Sci. 605, 1657–1661 (2011).
[Crossref]

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Figures (5)

Fig. 1.
Fig. 1. Pump power dependence of the ultrafast differential transmission dynamics (DTD) of pristine monolayer CVD-grown graphene. The arrow points to the pump power increase.
Fig. 2.
Fig. 2. Excitation power-dependent ultrafast dynamics of oxidized graphene with different degrees of oxidation. Oxidized for (a) 4 min, (b) 6 min, (c) 8 min, and (d) 10 min.
Fig. 3.
Fig. 3. Oxidation time dependence of the ultrafast dynamics of six graphene samples under excitation power of (a) 28 mW and (b) 131 mW.
Fig. 4.
Fig. 4. Raman spectra of graphene with different amounts of oxidation time. The number over each spectrum denotes oxidation time. Each spectrum is shifted upward for clarity. The inset shows the shift of the G peak and Fermi level with oxidation time.
Fig. 5.
Fig. 5. Simulated ultrafast dynamics of graphene with different Fermi levels but the same other parameters.

Equations (1)

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Re[σ(ω)]σ0=4kBTπ[ln(1+eEFh/kBT)+ln(1+eEFe/kBT)]1/τω2+1/τ2+12[tanh(ω2EFh4kBT)+tanh(ω2EFe4kBT)],

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