Abstract

We investigate free-space lasing actions from molecular nitrogen ions (N2+) at the wavelengths of ~391 nm and ~428 nm. Our results show that pronounced gain can be measured at either 391 nm or 428 nm laser wavelength with a pump laser centered at 800 nm wavelength, whereas the gain at 391 nm laser wavelength completely disappears when the wavelength of the pump laser is tuned to 1500 nm. Our theoretical analysis reveals that the different gain behaviors can be attributed to the vibrational distribution of populations in X2Σg+(v=0) and X2Σg+(v=1) states as the N2+ ions are generated by photoionization in the laser fields, giving rise to more robust (i.e., less sensitive to the pump laser wavelength) population inversion for generating the 428 nm laser.

© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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    [Crossref]
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    [Crossref]
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    [Crossref]
  23. G. Point, Y. Liu, Y. Brelet, S. Mitryukovskiy, P. Ding, A. Houard, and A. Mysyrowicz, “Lasing of ambient air with microjoule pulse energy pumped by a multi-terawatt infrared femtosecond laser,” Opt. Lett. 39(7), 1725–1728 (2014).
    [Crossref] [PubMed]
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    [Crossref]
  25. L. Arissian, B. Kamer, and A. Rasoulof, “Effect of rotational wave packets on the stimulated emission of nitrogen with light filament,” Opt. Commun. 369, 215–219 (2016).
    [Crossref]
  26. H. Zhang, C. Jing, G. Li, H. Xie, J. Yao, B. Zeng, W. Chu, J. Ni, H. Xu, and Y. Cheng, “Abnormal dependence of strong-field-ionization-induced nitrogen lasing on polarization ellipticity of the driving field,” Phys. Rev. A 88(6), 063417 (2013).
    [Crossref]
  27. X. Zhong, Z. Miao, L. Zhang, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Optimizing the 391-nm lasing intensity from ionized nitrogen molecules in 800-nm femtosecond laser fields,” Phys. Rev. A 97(3), 033409 (2018).
    [Crossref]
  28. S. I. Mitryukovskiy, Y. Liu, A. Houard, and A. Mysyrowicz, “Re-evaluation of the peak intensity inside a femtosecond laser filament in air,” J. Phys. At. Mol. Opt. Phys. 48(9), 094003 (2015).
    [Crossref]

2018 (5)

J. Yao, W. Chu, Z. Liu, B. Xu, J. Chen, and Y. Cheng, “Generation of Raman lasers from nitrogen molecular ions driven by ultraintense laser fields,” New J. Phys. 20(3), 033035 (2018).
[Crossref]

Z. Liu, J. Yao, J. Chen, B. Xu, W. Chu, and Y. Cheng, “Near-Resonant Raman Amplification in the Rotational Quantum Wave Packets of Nitrogen Molecular Ions Generated by Strong Field Ionization,” Phys. Rev. Lett. 120(8), 083205 (2018).
[Crossref] [PubMed]

J. Yao, W. Chu, Z. Liu, J. Chen, B. Xu, and Y. Cheng, “An anatomy of strong-field ionization-induced air lasing,” Appl. Phys. B 124(5), 73 (2018).
[Crossref]

M. Britton, P. Laferrière, D. H. Ko, Z. Li, F. Kong, G. Brown, A. Naumov, C. Zhang, L. Arissian, and P. B. Corkum, “Testing the Role of Recollision in N2+ Air Lasing,” Phys. Rev. Lett. 120(13), 133208 (2018).
[Crossref] [PubMed]

X. Zhong, Z. Miao, L. Zhang, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Optimizing the 391-nm lasing intensity from ionized nitrogen molecules in 800-nm femtosecond laser fields,” Phys. Rev. A 97(3), 033409 (2018).
[Crossref]

2017 (4)

X. Zhong, Z. Miao, L. Zhang, Q. Liang, M. Lei, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Vibrational and electronic excitation of ionized nitrogen molecules in intense laser fields,” Phys. Rev. A 96(4), 043422 (2017).
[Crossref]

A. Azarm, P. Corkum, and P. Polynkin, “Optical gain in rotationally excited nitrogen molecular ions,” Phys. Rev. A 96(5), 051401 (2017).
[Crossref]

H. Xu, E. Lötstedt, T. Ando, A. Iwasaki, and K. Yamanouchi, “Alignment-dependent population inversion in N2+ in intense few-cycle laser fields,” Phys. Rev. A 96(4), 041401 (2017).
[Crossref]

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

2016 (2)

L. Arissian, B. Kamer, and A. Rasoulof, “Effect of rotational wave packets on the stimulated emission of nitrogen with light filament,” Opt. Commun. 369, 215–219 (2016).
[Crossref]

J. Yao, S. Jiang, W. Chu, B. Zeng, C. Wu, R. Lu, Z. Li, H. Xie, G. Li, C. Yu, Z. Wang, H. Jiang, Q. Gong, and Y. Cheng, “Population Redistribution Among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields,” Phys. Rev. Lett. 116(14), 143007 (2016).
[Crossref] [PubMed]

2015 (4)

H. Xu, E. Lötstedt, A. Iwasaki, and K. Yamanouchi, “Sub-10-fs population inversion in N2+ in air lasing through multiple state coupling,” Nat. Commun. 6(1), 8347 (2015).
[Crossref] [PubMed]

Y. Liu, P. Ding, G. Lambert, A. Houard, V. Tikhonchuk, and A. Mysyrowicz, “Recollision-Induced Superradiance of Ionized Nitrogen Molecules,” Phys. Rev. Lett. 115(13), 133203 (2015).
[Crossref] [PubMed]

P. Wang, C. Wu, M. Lei, B. Dai, H. Yang, H. Jiang, and Q. Gong, “Population dynamics of molecular nitrogen initiated by intense femtosecond laser pulses,” Phys. Rev. A 92(6), 063412 (2015).
[Crossref]

S. I. Mitryukovskiy, Y. Liu, A. Houard, and A. Mysyrowicz, “Re-evaluation of the peak intensity inside a femtosecond laser filament in air,” J. Phys. At. Mol. Opt. Phys. 48(9), 094003 (2015).
[Crossref]

2014 (3)

G. Point, Y. Liu, Y. Brelet, S. Mitryukovskiy, P. Ding, A. Houard, and A. Mysyrowicz, “Lasing of ambient air with microjoule pulse energy pumped by a multi-terawatt infrared femtosecond laser,” Opt. Lett. 39(7), 1725–1728 (2014).
[Crossref] [PubMed]

G. Li, C. Jing, B. Zeng, H. Xie, J. Yao, W. Chu, J. Ni, H. Zhang, H. Xu, Y. Cheng, and Z. Xu, “Signature of superradiance from a nitrogen-gas plasma channel produced by strong-field ionization,” Phys. Rev. A 89(3), 033833 (2014).
[Crossref]

H. Xie, B. Zeng, G. Li, W. Chu, H. Zhang, C. Jing, J. Yao, J. Ni, Z. Wang, Z. Li, and Y. Cheng, “Coupling of N2+ rotational states in an air laser from tunnel-ionized nitrogen molecules,” Phys. Rev. A 90(4), 042504 (2014).
[Crossref]

2013 (6)

H. Zhang, C. Jing, G. Li, H. Xie, J. Yao, B. Zeng, W. Chu, J. Ni, H. Xu, and Y. Cheng, “Abnormal dependence of strong-field-ionization-induced nitrogen lasing on polarization ellipticity of the driving field,” Phys. Rev. A 88(6), 063417 (2013).
[Crossref]

H. Zhang, C. Jing, J. Yao, G. Li, B. Zeng, W. Chu, J. Ni, H. Xie, H. Xu, S. L. Chin, K. Yamanouchi, Y. Cheng, and Z. Xu, “Rotational Coherence Encoded in an “Air-Laser” Spectrum of Nitrogen Molecular Ions in an Intense Laser Field,” Phys. Rev. X 3(4), 041009 (2013).
[Crossref]

T. Wang, J. Daigle, J. Ju, S. Yuan, R. Li, and S. L. Chin, “Forward lasing action at multiple wavelengths seeded by white light from a femtosecond laser filament in air,” Phys. Rev. A 88(5), 053429 (2013).
[Crossref]

J. Yao, G. Li, C. Jing, B. Zeng, W. Chu, J. Ni, H. Zhang, H. Xie, C. Zhang, H. Li, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Remote creation of coherent emissions in air with two-color ultrafast laser pulses,” New J. Phys. 15(2), 023046 (2013).
[Crossref]

S. L. Chin, H. Xu, Y. Cheng, Z. Xu, and K. Yamanouchi, “Natural population inversion in a gaseous molecular filament,” Chin. Opt. Lett. 11(1), 013201 (2013).
[Crossref]

J. Ni, W. Chu, C. Jing, H. Zhang, B. Zeng, J. Yao, G. Li, H. Xie, C. Zhang, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Identification of the physical mechanism of generation of coherent N2(+) emissions in air by femtosecond laser excitation,” Opt. Express 21(7), 8746–8752 (2013).
[Crossref] [PubMed]

2011 (1)

J. Yao, B. Zeng, H. Xu, G. Li, W. Chu, J. Ni, H. Zhang, S. L. Chin, Y. Cheng, and Z. Xu, “High-brightness switchable multi-wavelength remote laser in air,” Phys. Rev. A 84(5), 051802 (2011).
[Crossref]

Ando, T.

H. Xu, E. Lötstedt, T. Ando, A. Iwasaki, and K. Yamanouchi, “Alignment-dependent population inversion in N2+ in intense few-cycle laser fields,” Phys. Rev. A 96(4), 041401 (2017).
[Crossref]

Arissian, L.

M. Britton, P. Laferrière, D. H. Ko, Z. Li, F. Kong, G. Brown, A. Naumov, C. Zhang, L. Arissian, and P. B. Corkum, “Testing the Role of Recollision in N2+ Air Lasing,” Phys. Rev. Lett. 120(13), 133208 (2018).
[Crossref] [PubMed]

L. Arissian, B. Kamer, and A. Rasoulof, “Effect of rotational wave packets on the stimulated emission of nitrogen with light filament,” Opt. Commun. 369, 215–219 (2016).
[Crossref]

Arnold, C. L.

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Azarm, A.

A. Azarm, P. Corkum, and P. Polynkin, “Optical gain in rotationally excited nitrogen molecular ions,” Phys. Rev. A 96(5), 051401 (2017).
[Crossref]

Bengtsson, S.

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Brelet, Y.

Britton, M.

M. Britton, P. Laferrière, D. H. Ko, Z. Li, F. Kong, G. Brown, A. Naumov, C. Zhang, L. Arissian, and P. B. Corkum, “Testing the Role of Recollision in N2+ Air Lasing,” Phys. Rev. Lett. 120(13), 133208 (2018).
[Crossref] [PubMed]

Brown, G.

M. Britton, P. Laferrière, D. H. Ko, Z. Li, F. Kong, G. Brown, A. Naumov, C. Zhang, L. Arissian, and P. B. Corkum, “Testing the Role of Recollision in N2+ Air Lasing,” Phys. Rev. Lett. 120(13), 133208 (2018).
[Crossref] [PubMed]

Chen, J.

J. Yao, W. Chu, Z. Liu, B. Xu, J. Chen, and Y. Cheng, “Generation of Raman lasers from nitrogen molecular ions driven by ultraintense laser fields,” New J. Phys. 20(3), 033035 (2018).
[Crossref]

Z. Liu, J. Yao, J. Chen, B. Xu, W. Chu, and Y. Cheng, “Near-Resonant Raman Amplification in the Rotational Quantum Wave Packets of Nitrogen Molecular Ions Generated by Strong Field Ionization,” Phys. Rev. Lett. 120(8), 083205 (2018).
[Crossref] [PubMed]

J. Yao, W. Chu, Z. Liu, J. Chen, B. Xu, and Y. Cheng, “An anatomy of strong-field ionization-induced air lasing,” Appl. Phys. B 124(5), 73 (2018).
[Crossref]

Chen, S.

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Cheng, Y.

J. Yao, W. Chu, Z. Liu, J. Chen, B. Xu, and Y. Cheng, “An anatomy of strong-field ionization-induced air lasing,” Appl. Phys. B 124(5), 73 (2018).
[Crossref]

Z. Liu, J. Yao, J. Chen, B. Xu, W. Chu, and Y. Cheng, “Near-Resonant Raman Amplification in the Rotational Quantum Wave Packets of Nitrogen Molecular Ions Generated by Strong Field Ionization,” Phys. Rev. Lett. 120(8), 083205 (2018).
[Crossref] [PubMed]

J. Yao, W. Chu, Z. Liu, B. Xu, J. Chen, and Y. Cheng, “Generation of Raman lasers from nitrogen molecular ions driven by ultraintense laser fields,” New J. Phys. 20(3), 033035 (2018).
[Crossref]

J. Yao, S. Jiang, W. Chu, B. Zeng, C. Wu, R. Lu, Z. Li, H. Xie, G. Li, C. Yu, Z. Wang, H. Jiang, Q. Gong, and Y. Cheng, “Population Redistribution Among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields,” Phys. Rev. Lett. 116(14), 143007 (2016).
[Crossref] [PubMed]

G. Li, C. Jing, B. Zeng, H. Xie, J. Yao, W. Chu, J. Ni, H. Zhang, H. Xu, Y. Cheng, and Z. Xu, “Signature of superradiance from a nitrogen-gas plasma channel produced by strong-field ionization,” Phys. Rev. A 89(3), 033833 (2014).
[Crossref]

H. Xie, B. Zeng, G. Li, W. Chu, H. Zhang, C. Jing, J. Yao, J. Ni, Z. Wang, Z. Li, and Y. Cheng, “Coupling of N2+ rotational states in an air laser from tunnel-ionized nitrogen molecules,” Phys. Rev. A 90(4), 042504 (2014).
[Crossref]

H. Zhang, C. Jing, G. Li, H. Xie, J. Yao, B. Zeng, W. Chu, J. Ni, H. Xu, and Y. Cheng, “Abnormal dependence of strong-field-ionization-induced nitrogen lasing on polarization ellipticity of the driving field,” Phys. Rev. A 88(6), 063417 (2013).
[Crossref]

H. Zhang, C. Jing, J. Yao, G. Li, B. Zeng, W. Chu, J. Ni, H. Xie, H. Xu, S. L. Chin, K. Yamanouchi, Y. Cheng, and Z. Xu, “Rotational Coherence Encoded in an “Air-Laser” Spectrum of Nitrogen Molecular Ions in an Intense Laser Field,” Phys. Rev. X 3(4), 041009 (2013).
[Crossref]

S. L. Chin, H. Xu, Y. Cheng, Z. Xu, and K. Yamanouchi, “Natural population inversion in a gaseous molecular filament,” Chin. Opt. Lett. 11(1), 013201 (2013).
[Crossref]

J. Yao, G. Li, C. Jing, B. Zeng, W. Chu, J. Ni, H. Zhang, H. Xie, C. Zhang, H. Li, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Remote creation of coherent emissions in air with two-color ultrafast laser pulses,” New J. Phys. 15(2), 023046 (2013).
[Crossref]

J. Ni, W. Chu, C. Jing, H. Zhang, B. Zeng, J. Yao, G. Li, H. Xie, C. Zhang, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Identification of the physical mechanism of generation of coherent N2(+) emissions in air by femtosecond laser excitation,” Opt. Express 21(7), 8746–8752 (2013).
[Crossref] [PubMed]

J. Yao, B. Zeng, H. Xu, G. Li, W. Chu, J. Ni, H. Zhang, S. L. Chin, Y. Cheng, and Z. Xu, “High-brightness switchable multi-wavelength remote laser in air,” Phys. Rev. A 84(5), 051802 (2011).
[Crossref]

Chin, S. L.

J. Ni, W. Chu, C. Jing, H. Zhang, B. Zeng, J. Yao, G. Li, H. Xie, C. Zhang, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Identification of the physical mechanism of generation of coherent N2(+) emissions in air by femtosecond laser excitation,” Opt. Express 21(7), 8746–8752 (2013).
[Crossref] [PubMed]

J. Yao, G. Li, C. Jing, B. Zeng, W. Chu, J. Ni, H. Zhang, H. Xie, C. Zhang, H. Li, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Remote creation of coherent emissions in air with two-color ultrafast laser pulses,” New J. Phys. 15(2), 023046 (2013).
[Crossref]

S. L. Chin, H. Xu, Y. Cheng, Z. Xu, and K. Yamanouchi, “Natural population inversion in a gaseous molecular filament,” Chin. Opt. Lett. 11(1), 013201 (2013).
[Crossref]

H. Zhang, C. Jing, J. Yao, G. Li, B. Zeng, W. Chu, J. Ni, H. Xie, H. Xu, S. L. Chin, K. Yamanouchi, Y. Cheng, and Z. Xu, “Rotational Coherence Encoded in an “Air-Laser” Spectrum of Nitrogen Molecular Ions in an Intense Laser Field,” Phys. Rev. X 3(4), 041009 (2013).
[Crossref]

T. Wang, J. Daigle, J. Ju, S. Yuan, R. Li, and S. L. Chin, “Forward lasing action at multiple wavelengths seeded by white light from a femtosecond laser filament in air,” Phys. Rev. A 88(5), 053429 (2013).
[Crossref]

J. Yao, B. Zeng, H. Xu, G. Li, W. Chu, J. Ni, H. Zhang, S. L. Chin, Y. Cheng, and Z. Xu, “High-brightness switchable multi-wavelength remote laser in air,” Phys. Rev. A 84(5), 051802 (2011).
[Crossref]

Chu, W.

Z. Liu, J. Yao, J. Chen, B. Xu, W. Chu, and Y. Cheng, “Near-Resonant Raman Amplification in the Rotational Quantum Wave Packets of Nitrogen Molecular Ions Generated by Strong Field Ionization,” Phys. Rev. Lett. 120(8), 083205 (2018).
[Crossref] [PubMed]

J. Yao, W. Chu, Z. Liu, B. Xu, J. Chen, and Y. Cheng, “Generation of Raman lasers from nitrogen molecular ions driven by ultraintense laser fields,” New J. Phys. 20(3), 033035 (2018).
[Crossref]

J. Yao, W. Chu, Z. Liu, J. Chen, B. Xu, and Y. Cheng, “An anatomy of strong-field ionization-induced air lasing,” Appl. Phys. B 124(5), 73 (2018).
[Crossref]

J. Yao, S. Jiang, W. Chu, B. Zeng, C. Wu, R. Lu, Z. Li, H. Xie, G. Li, C. Yu, Z. Wang, H. Jiang, Q. Gong, and Y. Cheng, “Population Redistribution Among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields,” Phys. Rev. Lett. 116(14), 143007 (2016).
[Crossref] [PubMed]

G. Li, C. Jing, B. Zeng, H. Xie, J. Yao, W. Chu, J. Ni, H. Zhang, H. Xu, Y. Cheng, and Z. Xu, “Signature of superradiance from a nitrogen-gas plasma channel produced by strong-field ionization,” Phys. Rev. A 89(3), 033833 (2014).
[Crossref]

H. Xie, B. Zeng, G. Li, W. Chu, H. Zhang, C. Jing, J. Yao, J. Ni, Z. Wang, Z. Li, and Y. Cheng, “Coupling of N2+ rotational states in an air laser from tunnel-ionized nitrogen molecules,” Phys. Rev. A 90(4), 042504 (2014).
[Crossref]

H. Zhang, C. Jing, G. Li, H. Xie, J. Yao, B. Zeng, W. Chu, J. Ni, H. Xu, and Y. Cheng, “Abnormal dependence of strong-field-ionization-induced nitrogen lasing on polarization ellipticity of the driving field,” Phys. Rev. A 88(6), 063417 (2013).
[Crossref]

H. Zhang, C. Jing, J. Yao, G. Li, B. Zeng, W. Chu, J. Ni, H. Xie, H. Xu, S. L. Chin, K. Yamanouchi, Y. Cheng, and Z. Xu, “Rotational Coherence Encoded in an “Air-Laser” Spectrum of Nitrogen Molecular Ions in an Intense Laser Field,” Phys. Rev. X 3(4), 041009 (2013).
[Crossref]

J. Yao, G. Li, C. Jing, B. Zeng, W. Chu, J. Ni, H. Zhang, H. Xie, C. Zhang, H. Li, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Remote creation of coherent emissions in air with two-color ultrafast laser pulses,” New J. Phys. 15(2), 023046 (2013).
[Crossref]

J. Ni, W. Chu, C. Jing, H. Zhang, B. Zeng, J. Yao, G. Li, H. Xie, C. Zhang, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Identification of the physical mechanism of generation of coherent N2(+) emissions in air by femtosecond laser excitation,” Opt. Express 21(7), 8746–8752 (2013).
[Crossref] [PubMed]

J. Yao, B. Zeng, H. Xu, G. Li, W. Chu, J. Ni, H. Zhang, S. L. Chin, Y. Cheng, and Z. Xu, “High-brightness switchable multi-wavelength remote laser in air,” Phys. Rev. A 84(5), 051802 (2011).
[Crossref]

Corkum, P.

A. Azarm, P. Corkum, and P. Polynkin, “Optical gain in rotationally excited nitrogen molecular ions,” Phys. Rev. A 96(5), 051401 (2017).
[Crossref]

Corkum, P. B.

M. Britton, P. Laferrière, D. H. Ko, Z. Li, F. Kong, G. Brown, A. Naumov, C. Zhang, L. Arissian, and P. B. Corkum, “Testing the Role of Recollision in N2+ Air Lasing,” Phys. Rev. Lett. 120(13), 133208 (2018).
[Crossref] [PubMed]

Dai, B.

P. Wang, C. Wu, M. Lei, B. Dai, H. Yang, H. Jiang, and Q. Gong, “Population dynamics of molecular nitrogen initiated by intense femtosecond laser pulses,” Phys. Rev. A 92(6), 063412 (2015).
[Crossref]

Daigle, J.

T. Wang, J. Daigle, J. Ju, S. Yuan, R. Li, and S. L. Chin, “Forward lasing action at multiple wavelengths seeded by white light from a femtosecond laser filament in air,” Phys. Rev. A 88(5), 053429 (2013).
[Crossref]

Danylo, R.

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Ding, P.

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Y. Liu, P. Ding, G. Lambert, A. Houard, V. Tikhonchuk, and A. Mysyrowicz, “Recollision-Induced Superradiance of Ionized Nitrogen Molecules,” Phys. Rev. Lett. 115(13), 133203 (2015).
[Crossref] [PubMed]

G. Point, Y. Liu, Y. Brelet, S. Mitryukovskiy, P. Ding, A. Houard, and A. Mysyrowicz, “Lasing of ambient air with microjoule pulse energy pumped by a multi-terawatt infrared femtosecond laser,” Opt. Lett. 39(7), 1725–1728 (2014).
[Crossref] [PubMed]

Fan, Z.

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Gong, Q.

X. Zhong, Z. Miao, L. Zhang, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Optimizing the 391-nm lasing intensity from ionized nitrogen molecules in 800-nm femtosecond laser fields,” Phys. Rev. A 97(3), 033409 (2018).
[Crossref]

X. Zhong, Z. Miao, L. Zhang, Q. Liang, M. Lei, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Vibrational and electronic excitation of ionized nitrogen molecules in intense laser fields,” Phys. Rev. A 96(4), 043422 (2017).
[Crossref]

J. Yao, S. Jiang, W. Chu, B. Zeng, C. Wu, R. Lu, Z. Li, H. Xie, G. Li, C. Yu, Z. Wang, H. Jiang, Q. Gong, and Y. Cheng, “Population Redistribution Among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields,” Phys. Rev. Lett. 116(14), 143007 (2016).
[Crossref] [PubMed]

P. Wang, C. Wu, M. Lei, B. Dai, H. Yang, H. Jiang, and Q. Gong, “Population dynamics of molecular nitrogen initiated by intense femtosecond laser pulses,” Phys. Rev. A 92(6), 063412 (2015).
[Crossref]

Houard, A.

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Y. Liu, P. Ding, G. Lambert, A. Houard, V. Tikhonchuk, and A. Mysyrowicz, “Recollision-Induced Superradiance of Ionized Nitrogen Molecules,” Phys. Rev. Lett. 115(13), 133203 (2015).
[Crossref] [PubMed]

S. I. Mitryukovskiy, Y. Liu, A. Houard, and A. Mysyrowicz, “Re-evaluation of the peak intensity inside a femtosecond laser filament in air,” J. Phys. At. Mol. Opt. Phys. 48(9), 094003 (2015).
[Crossref]

G. Point, Y. Liu, Y. Brelet, S. Mitryukovskiy, P. Ding, A. Houard, and A. Mysyrowicz, “Lasing of ambient air with microjoule pulse energy pumped by a multi-terawatt infrared femtosecond laser,” Opt. Lett. 39(7), 1725–1728 (2014).
[Crossref] [PubMed]

Ibrakovic, N.

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Iwasaki, A.

H. Xu, E. Lötstedt, T. Ando, A. Iwasaki, and K. Yamanouchi, “Alignment-dependent population inversion in N2+ in intense few-cycle laser fields,” Phys. Rev. A 96(4), 041401 (2017).
[Crossref]

H. Xu, E. Lötstedt, A. Iwasaki, and K. Yamanouchi, “Sub-10-fs population inversion in N2+ in air lasing through multiple state coupling,” Nat. Commun. 6(1), 8347 (2015).
[Crossref] [PubMed]

Jiang, H.

X. Zhong, Z. Miao, L. Zhang, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Optimizing the 391-nm lasing intensity from ionized nitrogen molecules in 800-nm femtosecond laser fields,” Phys. Rev. A 97(3), 033409 (2018).
[Crossref]

X. Zhong, Z. Miao, L. Zhang, Q. Liang, M. Lei, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Vibrational and electronic excitation of ionized nitrogen molecules in intense laser fields,” Phys. Rev. A 96(4), 043422 (2017).
[Crossref]

J. Yao, S. Jiang, W. Chu, B. Zeng, C. Wu, R. Lu, Z. Li, H. Xie, G. Li, C. Yu, Z. Wang, H. Jiang, Q. Gong, and Y. Cheng, “Population Redistribution Among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields,” Phys. Rev. Lett. 116(14), 143007 (2016).
[Crossref] [PubMed]

P. Wang, C. Wu, M. Lei, B. Dai, H. Yang, H. Jiang, and Q. Gong, “Population dynamics of molecular nitrogen initiated by intense femtosecond laser pulses,” Phys. Rev. A 92(6), 063412 (2015).
[Crossref]

Jiang, S.

J. Yao, S. Jiang, W. Chu, B. Zeng, C. Wu, R. Lu, Z. Li, H. Xie, G. Li, C. Yu, Z. Wang, H. Jiang, Q. Gong, and Y. Cheng, “Population Redistribution Among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields,” Phys. Rev. Lett. 116(14), 143007 (2016).
[Crossref] [PubMed]

Jing, C.

G. Li, C. Jing, B. Zeng, H. Xie, J. Yao, W. Chu, J. Ni, H. Zhang, H. Xu, Y. Cheng, and Z. Xu, “Signature of superradiance from a nitrogen-gas plasma channel produced by strong-field ionization,” Phys. Rev. A 89(3), 033833 (2014).
[Crossref]

H. Xie, B. Zeng, G. Li, W. Chu, H. Zhang, C. Jing, J. Yao, J. Ni, Z. Wang, Z. Li, and Y. Cheng, “Coupling of N2+ rotational states in an air laser from tunnel-ionized nitrogen molecules,” Phys. Rev. A 90(4), 042504 (2014).
[Crossref]

H. Zhang, C. Jing, G. Li, H. Xie, J. Yao, B. Zeng, W. Chu, J. Ni, H. Xu, and Y. Cheng, “Abnormal dependence of strong-field-ionization-induced nitrogen lasing on polarization ellipticity of the driving field,” Phys. Rev. A 88(6), 063417 (2013).
[Crossref]

H. Zhang, C. Jing, J. Yao, G. Li, B. Zeng, W. Chu, J. Ni, H. Xie, H. Xu, S. L. Chin, K. Yamanouchi, Y. Cheng, and Z. Xu, “Rotational Coherence Encoded in an “Air-Laser” Spectrum of Nitrogen Molecular Ions in an Intense Laser Field,” Phys. Rev. X 3(4), 041009 (2013).
[Crossref]

J. Yao, G. Li, C. Jing, B. Zeng, W. Chu, J. Ni, H. Zhang, H. Xie, C. Zhang, H. Li, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Remote creation of coherent emissions in air with two-color ultrafast laser pulses,” New J. Phys. 15(2), 023046 (2013).
[Crossref]

J. Ni, W. Chu, C. Jing, H. Zhang, B. Zeng, J. Yao, G. Li, H. Xie, C. Zhang, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Identification of the physical mechanism of generation of coherent N2(+) emissions in air by femtosecond laser excitation,” Opt. Express 21(7), 8746–8752 (2013).
[Crossref] [PubMed]

Ju, J.

T. Wang, J. Daigle, J. Ju, S. Yuan, R. Li, and S. L. Chin, “Forward lasing action at multiple wavelengths seeded by white light from a femtosecond laser filament in air,” Phys. Rev. A 88(5), 053429 (2013).
[Crossref]

Kamer, B.

L. Arissian, B. Kamer, and A. Rasoulof, “Effect of rotational wave packets on the stimulated emission of nitrogen with light filament,” Opt. Commun. 369, 215–219 (2016).
[Crossref]

Ko, D. H.

M. Britton, P. Laferrière, D. H. Ko, Z. Li, F. Kong, G. Brown, A. Naumov, C. Zhang, L. Arissian, and P. B. Corkum, “Testing the Role of Recollision in N2+ Air Lasing,” Phys. Rev. Lett. 120(13), 133208 (2018).
[Crossref] [PubMed]

Kong, F.

M. Britton, P. Laferrière, D. H. Ko, Z. Li, F. Kong, G. Brown, A. Naumov, C. Zhang, L. Arissian, and P. B. Corkum, “Testing the Role of Recollision in N2+ Air Lasing,” Phys. Rev. Lett. 120(13), 133208 (2018).
[Crossref] [PubMed]

L’Huillier, A.

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Laferrière, P.

M. Britton, P. Laferrière, D. H. Ko, Z. Li, F. Kong, G. Brown, A. Naumov, C. Zhang, L. Arissian, and P. B. Corkum, “Testing the Role of Recollision in N2+ Air Lasing,” Phys. Rev. Lett. 120(13), 133208 (2018).
[Crossref] [PubMed]

Lambert, G.

Y. Liu, P. Ding, G. Lambert, A. Houard, V. Tikhonchuk, and A. Mysyrowicz, “Recollision-Induced Superradiance of Ionized Nitrogen Molecules,” Phys. Rev. Lett. 115(13), 133203 (2015).
[Crossref] [PubMed]

Larsen, E. W.

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Lei, M.

X. Zhong, Z. Miao, L. Zhang, Q. Liang, M. Lei, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Vibrational and electronic excitation of ionized nitrogen molecules in intense laser fields,” Phys. Rev. A 96(4), 043422 (2017).
[Crossref]

P. Wang, C. Wu, M. Lei, B. Dai, H. Yang, H. Jiang, and Q. Gong, “Population dynamics of molecular nitrogen initiated by intense femtosecond laser pulses,” Phys. Rev. A 92(6), 063412 (2015).
[Crossref]

Li, G.

J. Yao, S. Jiang, W. Chu, B. Zeng, C. Wu, R. Lu, Z. Li, H. Xie, G. Li, C. Yu, Z. Wang, H. Jiang, Q. Gong, and Y. Cheng, “Population Redistribution Among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields,” Phys. Rev. Lett. 116(14), 143007 (2016).
[Crossref] [PubMed]

G. Li, C. Jing, B. Zeng, H. Xie, J. Yao, W. Chu, J. Ni, H. Zhang, H. Xu, Y. Cheng, and Z. Xu, “Signature of superradiance from a nitrogen-gas plasma channel produced by strong-field ionization,” Phys. Rev. A 89(3), 033833 (2014).
[Crossref]

H. Xie, B. Zeng, G. Li, W. Chu, H. Zhang, C. Jing, J. Yao, J. Ni, Z. Wang, Z. Li, and Y. Cheng, “Coupling of N2+ rotational states in an air laser from tunnel-ionized nitrogen molecules,” Phys. Rev. A 90(4), 042504 (2014).
[Crossref]

H. Zhang, C. Jing, J. Yao, G. Li, B. Zeng, W. Chu, J. Ni, H. Xie, H. Xu, S. L. Chin, K. Yamanouchi, Y. Cheng, and Z. Xu, “Rotational Coherence Encoded in an “Air-Laser” Spectrum of Nitrogen Molecular Ions in an Intense Laser Field,” Phys. Rev. X 3(4), 041009 (2013).
[Crossref]

H. Zhang, C. Jing, G. Li, H. Xie, J. Yao, B. Zeng, W. Chu, J. Ni, H. Xu, and Y. Cheng, “Abnormal dependence of strong-field-ionization-induced nitrogen lasing on polarization ellipticity of the driving field,” Phys. Rev. A 88(6), 063417 (2013).
[Crossref]

J. Ni, W. Chu, C. Jing, H. Zhang, B. Zeng, J. Yao, G. Li, H. Xie, C. Zhang, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Identification of the physical mechanism of generation of coherent N2(+) emissions in air by femtosecond laser excitation,” Opt. Express 21(7), 8746–8752 (2013).
[Crossref] [PubMed]

J. Yao, G. Li, C. Jing, B. Zeng, W. Chu, J. Ni, H. Zhang, H. Xie, C. Zhang, H. Li, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Remote creation of coherent emissions in air with two-color ultrafast laser pulses,” New J. Phys. 15(2), 023046 (2013).
[Crossref]

J. Yao, B. Zeng, H. Xu, G. Li, W. Chu, J. Ni, H. Zhang, S. L. Chin, Y. Cheng, and Z. Xu, “High-brightness switchable multi-wavelength remote laser in air,” Phys. Rev. A 84(5), 051802 (2011).
[Crossref]

Li, H.

J. Yao, G. Li, C. Jing, B. Zeng, W. Chu, J. Ni, H. Zhang, H. Xie, C. Zhang, H. Li, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Remote creation of coherent emissions in air with two-color ultrafast laser pulses,” New J. Phys. 15(2), 023046 (2013).
[Crossref]

Li, R.

T. Wang, J. Daigle, J. Ju, S. Yuan, R. Li, and S. L. Chin, “Forward lasing action at multiple wavelengths seeded by white light from a femtosecond laser filament in air,” Phys. Rev. A 88(5), 053429 (2013).
[Crossref]

Li, Z.

M. Britton, P. Laferrière, D. H. Ko, Z. Li, F. Kong, G. Brown, A. Naumov, C. Zhang, L. Arissian, and P. B. Corkum, “Testing the Role of Recollision in N2+ Air Lasing,” Phys. Rev. Lett. 120(13), 133208 (2018).
[Crossref] [PubMed]

J. Yao, S. Jiang, W. Chu, B. Zeng, C. Wu, R. Lu, Z. Li, H. Xie, G. Li, C. Yu, Z. Wang, H. Jiang, Q. Gong, and Y. Cheng, “Population Redistribution Among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields,” Phys. Rev. Lett. 116(14), 143007 (2016).
[Crossref] [PubMed]

H. Xie, B. Zeng, G. Li, W. Chu, H. Zhang, C. Jing, J. Yao, J. Ni, Z. Wang, Z. Li, and Y. Cheng, “Coupling of N2+ rotational states in an air laser from tunnel-ionized nitrogen molecules,” Phys. Rev. A 90(4), 042504 (2014).
[Crossref]

Liang, Q.

X. Zhong, Z. Miao, L. Zhang, Q. Liang, M. Lei, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Vibrational and electronic excitation of ionized nitrogen molecules in intense laser fields,” Phys. Rev. A 96(4), 043422 (2017).
[Crossref]

Liu, Y.

X. Zhong, Z. Miao, L. Zhang, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Optimizing the 391-nm lasing intensity from ionized nitrogen molecules in 800-nm femtosecond laser fields,” Phys. Rev. A 97(3), 033409 (2018).
[Crossref]

X. Zhong, Z. Miao, L. Zhang, Q. Liang, M. Lei, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Vibrational and electronic excitation of ionized nitrogen molecules in intense laser fields,” Phys. Rev. A 96(4), 043422 (2017).
[Crossref]

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Y. Liu, P. Ding, G. Lambert, A. Houard, V. Tikhonchuk, and A. Mysyrowicz, “Recollision-Induced Superradiance of Ionized Nitrogen Molecules,” Phys. Rev. Lett. 115(13), 133203 (2015).
[Crossref] [PubMed]

S. I. Mitryukovskiy, Y. Liu, A. Houard, and A. Mysyrowicz, “Re-evaluation of the peak intensity inside a femtosecond laser filament in air,” J. Phys. At. Mol. Opt. Phys. 48(9), 094003 (2015).
[Crossref]

G. Point, Y. Liu, Y. Brelet, S. Mitryukovskiy, P. Ding, A. Houard, and A. Mysyrowicz, “Lasing of ambient air with microjoule pulse energy pumped by a multi-terawatt infrared femtosecond laser,” Opt. Lett. 39(7), 1725–1728 (2014).
[Crossref] [PubMed]

Liu, Z.

J. Yao, W. Chu, Z. Liu, J. Chen, B. Xu, and Y. Cheng, “An anatomy of strong-field ionization-induced air lasing,” Appl. Phys. B 124(5), 73 (2018).
[Crossref]

J. Yao, W. Chu, Z. Liu, B. Xu, J. Chen, and Y. Cheng, “Generation of Raman lasers from nitrogen molecular ions driven by ultraintense laser fields,” New J. Phys. 20(3), 033035 (2018).
[Crossref]

Z. Liu, J. Yao, J. Chen, B. Xu, W. Chu, and Y. Cheng, “Near-Resonant Raman Amplification in the Rotational Quantum Wave Packets of Nitrogen Molecular Ions Generated by Strong Field Ionization,” Phys. Rev. Lett. 120(8), 083205 (2018).
[Crossref] [PubMed]

Lötstedt, E.

H. Xu, E. Lötstedt, T. Ando, A. Iwasaki, and K. Yamanouchi, “Alignment-dependent population inversion in N2+ in intense few-cycle laser fields,” Phys. Rev. A 96(4), 041401 (2017).
[Crossref]

H. Xu, E. Lötstedt, A. Iwasaki, and K. Yamanouchi, “Sub-10-fs population inversion in N2+ in air lasing through multiple state coupling,” Nat. Commun. 6(1), 8347 (2015).
[Crossref] [PubMed]

Lu, R.

J. Yao, S. Jiang, W. Chu, B. Zeng, C. Wu, R. Lu, Z. Li, H. Xie, G. Li, C. Yu, Z. Wang, H. Jiang, Q. Gong, and Y. Cheng, “Population Redistribution Among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields,” Phys. Rev. Lett. 116(14), 143007 (2016).
[Crossref] [PubMed]

Mauritsson, J.

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Miao, Z.

X. Zhong, Z. Miao, L. Zhang, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Optimizing the 391-nm lasing intensity from ionized nitrogen molecules in 800-nm femtosecond laser fields,” Phys. Rev. A 97(3), 033409 (2018).
[Crossref]

X. Zhong, Z. Miao, L. Zhang, Q. Liang, M. Lei, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Vibrational and electronic excitation of ionized nitrogen molecules in intense laser fields,” Phys. Rev. A 96(4), 043422 (2017).
[Crossref]

Mitryukovskiy, S.

Mitryukovskiy, S. I.

S. I. Mitryukovskiy, Y. Liu, A. Houard, and A. Mysyrowicz, “Re-evaluation of the peak intensity inside a femtosecond laser filament in air,” J. Phys. At. Mol. Opt. Phys. 48(9), 094003 (2015).
[Crossref]

Mysyrowicz, A.

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Y. Liu, P. Ding, G. Lambert, A. Houard, V. Tikhonchuk, and A. Mysyrowicz, “Recollision-Induced Superradiance of Ionized Nitrogen Molecules,” Phys. Rev. Lett. 115(13), 133203 (2015).
[Crossref] [PubMed]

S. I. Mitryukovskiy, Y. Liu, A. Houard, and A. Mysyrowicz, “Re-evaluation of the peak intensity inside a femtosecond laser filament in air,” J. Phys. At. Mol. Opt. Phys. 48(9), 094003 (2015).
[Crossref]

G. Point, Y. Liu, Y. Brelet, S. Mitryukovskiy, P. Ding, A. Houard, and A. Mysyrowicz, “Lasing of ambient air with microjoule pulse energy pumped by a multi-terawatt infrared femtosecond laser,” Opt. Lett. 39(7), 1725–1728 (2014).
[Crossref] [PubMed]

Naumov, A.

M. Britton, P. Laferrière, D. H. Ko, Z. Li, F. Kong, G. Brown, A. Naumov, C. Zhang, L. Arissian, and P. B. Corkum, “Testing the Role of Recollision in N2+ Air Lasing,” Phys. Rev. Lett. 120(13), 133208 (2018).
[Crossref] [PubMed]

Ni, J.

H. Xie, B. Zeng, G. Li, W. Chu, H. Zhang, C. Jing, J. Yao, J. Ni, Z. Wang, Z. Li, and Y. Cheng, “Coupling of N2+ rotational states in an air laser from tunnel-ionized nitrogen molecules,” Phys. Rev. A 90(4), 042504 (2014).
[Crossref]

G. Li, C. Jing, B. Zeng, H. Xie, J. Yao, W. Chu, J. Ni, H. Zhang, H. Xu, Y. Cheng, and Z. Xu, “Signature of superradiance from a nitrogen-gas plasma channel produced by strong-field ionization,” Phys. Rev. A 89(3), 033833 (2014).
[Crossref]

J. Ni, W. Chu, C. Jing, H. Zhang, B. Zeng, J. Yao, G. Li, H. Xie, C. Zhang, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Identification of the physical mechanism of generation of coherent N2(+) emissions in air by femtosecond laser excitation,” Opt. Express 21(7), 8746–8752 (2013).
[Crossref] [PubMed]

J. Yao, G. Li, C. Jing, B. Zeng, W. Chu, J. Ni, H. Zhang, H. Xie, C. Zhang, H. Li, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Remote creation of coherent emissions in air with two-color ultrafast laser pulses,” New J. Phys. 15(2), 023046 (2013).
[Crossref]

H. Zhang, C. Jing, G. Li, H. Xie, J. Yao, B. Zeng, W. Chu, J. Ni, H. Xu, and Y. Cheng, “Abnormal dependence of strong-field-ionization-induced nitrogen lasing on polarization ellipticity of the driving field,” Phys. Rev. A 88(6), 063417 (2013).
[Crossref]

H. Zhang, C. Jing, J. Yao, G. Li, B. Zeng, W. Chu, J. Ni, H. Xie, H. Xu, S. L. Chin, K. Yamanouchi, Y. Cheng, and Z. Xu, “Rotational Coherence Encoded in an “Air-Laser” Spectrum of Nitrogen Molecular Ions in an Intense Laser Field,” Phys. Rev. X 3(4), 041009 (2013).
[Crossref]

J. Yao, B. Zeng, H. Xu, G. Li, W. Chu, J. Ni, H. Zhang, S. L. Chin, Y. Cheng, and Z. Xu, “High-brightness switchable multi-wavelength remote laser in air,” Phys. Rev. A 84(5), 051802 (2011).
[Crossref]

Point, G.

Polynkin, P.

A. Azarm, P. Corkum, and P. Polynkin, “Optical gain in rotationally excited nitrogen molecular ions,” Phys. Rev. A 96(5), 051401 (2017).
[Crossref]

Rasoulof, A.

L. Arissian, B. Kamer, and A. Rasoulof, “Effect of rotational wave packets on the stimulated emission of nitrogen with light filament,” Opt. Commun. 369, 215–219 (2016).
[Crossref]

Simpson, E. R.

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Tikhonchuk, V.

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Y. Liu, P. Ding, G. Lambert, A. Houard, V. Tikhonchuk, and A. Mysyrowicz, “Recollision-Induced Superradiance of Ionized Nitrogen Molecules,” Phys. Rev. Lett. 115(13), 133203 (2015).
[Crossref] [PubMed]

Wang, P.

P. Wang, C. Wu, M. Lei, B. Dai, H. Yang, H. Jiang, and Q. Gong, “Population dynamics of molecular nitrogen initiated by intense femtosecond laser pulses,” Phys. Rev. A 92(6), 063412 (2015).
[Crossref]

Wang, T.

T. Wang, J. Daigle, J. Ju, S. Yuan, R. Li, and S. L. Chin, “Forward lasing action at multiple wavelengths seeded by white light from a femtosecond laser filament in air,” Phys. Rev. A 88(5), 053429 (2013).
[Crossref]

Wang, Z.

J. Yao, S. Jiang, W. Chu, B. Zeng, C. Wu, R. Lu, Z. Li, H. Xie, G. Li, C. Yu, Z. Wang, H. Jiang, Q. Gong, and Y. Cheng, “Population Redistribution Among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields,” Phys. Rev. Lett. 116(14), 143007 (2016).
[Crossref] [PubMed]

H. Xie, B. Zeng, G. Li, W. Chu, H. Zhang, C. Jing, J. Yao, J. Ni, Z. Wang, Z. Li, and Y. Cheng, “Coupling of N2+ rotational states in an air laser from tunnel-ionized nitrogen molecules,” Phys. Rev. A 90(4), 042504 (2014).
[Crossref]

Wu, C.

X. Zhong, Z. Miao, L. Zhang, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Optimizing the 391-nm lasing intensity from ionized nitrogen molecules in 800-nm femtosecond laser fields,” Phys. Rev. A 97(3), 033409 (2018).
[Crossref]

X. Zhong, Z. Miao, L. Zhang, Q. Liang, M. Lei, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Vibrational and electronic excitation of ionized nitrogen molecules in intense laser fields,” Phys. Rev. A 96(4), 043422 (2017).
[Crossref]

J. Yao, S. Jiang, W. Chu, B. Zeng, C. Wu, R. Lu, Z. Li, H. Xie, G. Li, C. Yu, Z. Wang, H. Jiang, Q. Gong, and Y. Cheng, “Population Redistribution Among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields,” Phys. Rev. Lett. 116(14), 143007 (2016).
[Crossref] [PubMed]

P. Wang, C. Wu, M. Lei, B. Dai, H. Yang, H. Jiang, and Q. Gong, “Population dynamics of molecular nitrogen initiated by intense femtosecond laser pulses,” Phys. Rev. A 92(6), 063412 (2015).
[Crossref]

Xie, H.

J. Yao, S. Jiang, W. Chu, B. Zeng, C. Wu, R. Lu, Z. Li, H. Xie, G. Li, C. Yu, Z. Wang, H. Jiang, Q. Gong, and Y. Cheng, “Population Redistribution Among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields,” Phys. Rev. Lett. 116(14), 143007 (2016).
[Crossref] [PubMed]

G. Li, C. Jing, B. Zeng, H. Xie, J. Yao, W. Chu, J. Ni, H. Zhang, H. Xu, Y. Cheng, and Z. Xu, “Signature of superradiance from a nitrogen-gas plasma channel produced by strong-field ionization,” Phys. Rev. A 89(3), 033833 (2014).
[Crossref]

H. Xie, B. Zeng, G. Li, W. Chu, H. Zhang, C. Jing, J. Yao, J. Ni, Z. Wang, Z. Li, and Y. Cheng, “Coupling of N2+ rotational states in an air laser from tunnel-ionized nitrogen molecules,” Phys. Rev. A 90(4), 042504 (2014).
[Crossref]

H. Zhang, C. Jing, J. Yao, G. Li, B. Zeng, W. Chu, J. Ni, H. Xie, H. Xu, S. L. Chin, K. Yamanouchi, Y. Cheng, and Z. Xu, “Rotational Coherence Encoded in an “Air-Laser” Spectrum of Nitrogen Molecular Ions in an Intense Laser Field,” Phys. Rev. X 3(4), 041009 (2013).
[Crossref]

H. Zhang, C. Jing, G. Li, H. Xie, J. Yao, B. Zeng, W. Chu, J. Ni, H. Xu, and Y. Cheng, “Abnormal dependence of strong-field-ionization-induced nitrogen lasing on polarization ellipticity of the driving field,” Phys. Rev. A 88(6), 063417 (2013).
[Crossref]

J. Yao, G. Li, C. Jing, B. Zeng, W. Chu, J. Ni, H. Zhang, H. Xie, C. Zhang, H. Li, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Remote creation of coherent emissions in air with two-color ultrafast laser pulses,” New J. Phys. 15(2), 023046 (2013).
[Crossref]

J. Ni, W. Chu, C. Jing, H. Zhang, B. Zeng, J. Yao, G. Li, H. Xie, C. Zhang, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Identification of the physical mechanism of generation of coherent N2(+) emissions in air by femtosecond laser excitation,” Opt. Express 21(7), 8746–8752 (2013).
[Crossref] [PubMed]

Xu, B.

J. Yao, W. Chu, Z. Liu, J. Chen, B. Xu, and Y. Cheng, “An anatomy of strong-field ionization-induced air lasing,” Appl. Phys. B 124(5), 73 (2018).
[Crossref]

J. Yao, W. Chu, Z. Liu, B. Xu, J. Chen, and Y. Cheng, “Generation of Raman lasers from nitrogen molecular ions driven by ultraintense laser fields,” New J. Phys. 20(3), 033035 (2018).
[Crossref]

Z. Liu, J. Yao, J. Chen, B. Xu, W. Chu, and Y. Cheng, “Near-Resonant Raman Amplification in the Rotational Quantum Wave Packets of Nitrogen Molecular Ions Generated by Strong Field Ionization,” Phys. Rev. Lett. 120(8), 083205 (2018).
[Crossref] [PubMed]

Xu, H.

H. Xu, E. Lötstedt, T. Ando, A. Iwasaki, and K. Yamanouchi, “Alignment-dependent population inversion in N2+ in intense few-cycle laser fields,” Phys. Rev. A 96(4), 041401 (2017).
[Crossref]

H. Xu, E. Lötstedt, A. Iwasaki, and K. Yamanouchi, “Sub-10-fs population inversion in N2+ in air lasing through multiple state coupling,” Nat. Commun. 6(1), 8347 (2015).
[Crossref] [PubMed]

G. Li, C. Jing, B. Zeng, H. Xie, J. Yao, W. Chu, J. Ni, H. Zhang, H. Xu, Y. Cheng, and Z. Xu, “Signature of superradiance from a nitrogen-gas plasma channel produced by strong-field ionization,” Phys. Rev. A 89(3), 033833 (2014).
[Crossref]

S. L. Chin, H. Xu, Y. Cheng, Z. Xu, and K. Yamanouchi, “Natural population inversion in a gaseous molecular filament,” Chin. Opt. Lett. 11(1), 013201 (2013).
[Crossref]

J. Ni, W. Chu, C. Jing, H. Zhang, B. Zeng, J. Yao, G. Li, H. Xie, C. Zhang, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Identification of the physical mechanism of generation of coherent N2(+) emissions in air by femtosecond laser excitation,” Opt. Express 21(7), 8746–8752 (2013).
[Crossref] [PubMed]

J. Yao, G. Li, C. Jing, B. Zeng, W. Chu, J. Ni, H. Zhang, H. Xie, C. Zhang, H. Li, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Remote creation of coherent emissions in air with two-color ultrafast laser pulses,” New J. Phys. 15(2), 023046 (2013).
[Crossref]

H. Zhang, C. Jing, G. Li, H. Xie, J. Yao, B. Zeng, W. Chu, J. Ni, H. Xu, and Y. Cheng, “Abnormal dependence of strong-field-ionization-induced nitrogen lasing on polarization ellipticity of the driving field,” Phys. Rev. A 88(6), 063417 (2013).
[Crossref]

H. Zhang, C. Jing, J. Yao, G. Li, B. Zeng, W. Chu, J. Ni, H. Xie, H. Xu, S. L. Chin, K. Yamanouchi, Y. Cheng, and Z. Xu, “Rotational Coherence Encoded in an “Air-Laser” Spectrum of Nitrogen Molecular Ions in an Intense Laser Field,” Phys. Rev. X 3(4), 041009 (2013).
[Crossref]

J. Yao, B. Zeng, H. Xu, G. Li, W. Chu, J. Ni, H. Zhang, S. L. Chin, Y. Cheng, and Z. Xu, “High-brightness switchable multi-wavelength remote laser in air,” Phys. Rev. A 84(5), 051802 (2011).
[Crossref]

Xu, Z.

G. Li, C. Jing, B. Zeng, H. Xie, J. Yao, W. Chu, J. Ni, H. Zhang, H. Xu, Y. Cheng, and Z. Xu, “Signature of superradiance from a nitrogen-gas plasma channel produced by strong-field ionization,” Phys. Rev. A 89(3), 033833 (2014).
[Crossref]

S. L. Chin, H. Xu, Y. Cheng, Z. Xu, and K. Yamanouchi, “Natural population inversion in a gaseous molecular filament,” Chin. Opt. Lett. 11(1), 013201 (2013).
[Crossref]

J. Yao, G. Li, C. Jing, B. Zeng, W. Chu, J. Ni, H. Zhang, H. Xie, C. Zhang, H. Li, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Remote creation of coherent emissions in air with two-color ultrafast laser pulses,” New J. Phys. 15(2), 023046 (2013).
[Crossref]

J. Ni, W. Chu, C. Jing, H. Zhang, B. Zeng, J. Yao, G. Li, H. Xie, C. Zhang, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Identification of the physical mechanism of generation of coherent N2(+) emissions in air by femtosecond laser excitation,” Opt. Express 21(7), 8746–8752 (2013).
[Crossref] [PubMed]

H. Zhang, C. Jing, J. Yao, G. Li, B. Zeng, W. Chu, J. Ni, H. Xie, H. Xu, S. L. Chin, K. Yamanouchi, Y. Cheng, and Z. Xu, “Rotational Coherence Encoded in an “Air-Laser” Spectrum of Nitrogen Molecular Ions in an Intense Laser Field,” Phys. Rev. X 3(4), 041009 (2013).
[Crossref]

J. Yao, B. Zeng, H. Xu, G. Li, W. Chu, J. Ni, H. Zhang, S. L. Chin, Y. Cheng, and Z. Xu, “High-brightness switchable multi-wavelength remote laser in air,” Phys. Rev. A 84(5), 051802 (2011).
[Crossref]

Yamanouchi, K.

H. Xu, E. Lötstedt, T. Ando, A. Iwasaki, and K. Yamanouchi, “Alignment-dependent population inversion in N2+ in intense few-cycle laser fields,” Phys. Rev. A 96(4), 041401 (2017).
[Crossref]

H. Xu, E. Lötstedt, A. Iwasaki, and K. Yamanouchi, “Sub-10-fs population inversion in N2+ in air lasing through multiple state coupling,” Nat. Commun. 6(1), 8347 (2015).
[Crossref] [PubMed]

S. L. Chin, H. Xu, Y. Cheng, Z. Xu, and K. Yamanouchi, “Natural population inversion in a gaseous molecular filament,” Chin. Opt. Lett. 11(1), 013201 (2013).
[Crossref]

H. Zhang, C. Jing, J. Yao, G. Li, B. Zeng, W. Chu, J. Ni, H. Xie, H. Xu, S. L. Chin, K. Yamanouchi, Y. Cheng, and Z. Xu, “Rotational Coherence Encoded in an “Air-Laser” Spectrum of Nitrogen Molecular Ions in an Intense Laser Field,” Phys. Rev. X 3(4), 041009 (2013).
[Crossref]

Yang, H.

P. Wang, C. Wu, M. Lei, B. Dai, H. Yang, H. Jiang, and Q. Gong, “Population dynamics of molecular nitrogen initiated by intense femtosecond laser pulses,” Phys. Rev. A 92(6), 063412 (2015).
[Crossref]

Yao, J.

J. Yao, W. Chu, Z. Liu, J. Chen, B. Xu, and Y. Cheng, “An anatomy of strong-field ionization-induced air lasing,” Appl. Phys. B 124(5), 73 (2018).
[Crossref]

J. Yao, W. Chu, Z. Liu, B. Xu, J. Chen, and Y. Cheng, “Generation of Raman lasers from nitrogen molecular ions driven by ultraintense laser fields,” New J. Phys. 20(3), 033035 (2018).
[Crossref]

Z. Liu, J. Yao, J. Chen, B. Xu, W. Chu, and Y. Cheng, “Near-Resonant Raman Amplification in the Rotational Quantum Wave Packets of Nitrogen Molecular Ions Generated by Strong Field Ionization,” Phys. Rev. Lett. 120(8), 083205 (2018).
[Crossref] [PubMed]

J. Yao, S. Jiang, W. Chu, B. Zeng, C. Wu, R. Lu, Z. Li, H. Xie, G. Li, C. Yu, Z. Wang, H. Jiang, Q. Gong, and Y. Cheng, “Population Redistribution Among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields,” Phys. Rev. Lett. 116(14), 143007 (2016).
[Crossref] [PubMed]

G. Li, C. Jing, B. Zeng, H. Xie, J. Yao, W. Chu, J. Ni, H. Zhang, H. Xu, Y. Cheng, and Z. Xu, “Signature of superradiance from a nitrogen-gas plasma channel produced by strong-field ionization,” Phys. Rev. A 89(3), 033833 (2014).
[Crossref]

H. Xie, B. Zeng, G. Li, W. Chu, H. Zhang, C. Jing, J. Yao, J. Ni, Z. Wang, Z. Li, and Y. Cheng, “Coupling of N2+ rotational states in an air laser from tunnel-ionized nitrogen molecules,” Phys. Rev. A 90(4), 042504 (2014).
[Crossref]

H. Zhang, C. Jing, G. Li, H. Xie, J. Yao, B. Zeng, W. Chu, J. Ni, H. Xu, and Y. Cheng, “Abnormal dependence of strong-field-ionization-induced nitrogen lasing on polarization ellipticity of the driving field,” Phys. Rev. A 88(6), 063417 (2013).
[Crossref]

H. Zhang, C. Jing, J. Yao, G. Li, B. Zeng, W. Chu, J. Ni, H. Xie, H. Xu, S. L. Chin, K. Yamanouchi, Y. Cheng, and Z. Xu, “Rotational Coherence Encoded in an “Air-Laser” Spectrum of Nitrogen Molecular Ions in an Intense Laser Field,” Phys. Rev. X 3(4), 041009 (2013).
[Crossref]

J. Yao, G. Li, C. Jing, B. Zeng, W. Chu, J. Ni, H. Zhang, H. Xie, C. Zhang, H. Li, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Remote creation of coherent emissions in air with two-color ultrafast laser pulses,” New J. Phys. 15(2), 023046 (2013).
[Crossref]

J. Ni, W. Chu, C. Jing, H. Zhang, B. Zeng, J. Yao, G. Li, H. Xie, C. Zhang, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Identification of the physical mechanism of generation of coherent N2(+) emissions in air by femtosecond laser excitation,” Opt. Express 21(7), 8746–8752 (2013).
[Crossref] [PubMed]

J. Yao, B. Zeng, H. Xu, G. Li, W. Chu, J. Ni, H. Zhang, S. L. Chin, Y. Cheng, and Z. Xu, “High-brightness switchable multi-wavelength remote laser in air,” Phys. Rev. A 84(5), 051802 (2011).
[Crossref]

Yu, C.

J. Yao, S. Jiang, W. Chu, B. Zeng, C. Wu, R. Lu, Z. Li, H. Xie, G. Li, C. Yu, Z. Wang, H. Jiang, Q. Gong, and Y. Cheng, “Population Redistribution Among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields,” Phys. Rev. Lett. 116(14), 143007 (2016).
[Crossref] [PubMed]

Yuan, S.

T. Wang, J. Daigle, J. Ju, S. Yuan, R. Li, and S. L. Chin, “Forward lasing action at multiple wavelengths seeded by white light from a femtosecond laser filament in air,” Phys. Rev. A 88(5), 053429 (2013).
[Crossref]

Zeng, B.

J. Yao, S. Jiang, W. Chu, B. Zeng, C. Wu, R. Lu, Z. Li, H. Xie, G. Li, C. Yu, Z. Wang, H. Jiang, Q. Gong, and Y. Cheng, “Population Redistribution Among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields,” Phys. Rev. Lett. 116(14), 143007 (2016).
[Crossref] [PubMed]

G. Li, C. Jing, B. Zeng, H. Xie, J. Yao, W. Chu, J. Ni, H. Zhang, H. Xu, Y. Cheng, and Z. Xu, “Signature of superradiance from a nitrogen-gas plasma channel produced by strong-field ionization,” Phys. Rev. A 89(3), 033833 (2014).
[Crossref]

H. Xie, B. Zeng, G. Li, W. Chu, H. Zhang, C. Jing, J. Yao, J. Ni, Z. Wang, Z. Li, and Y. Cheng, “Coupling of N2+ rotational states in an air laser from tunnel-ionized nitrogen molecules,” Phys. Rev. A 90(4), 042504 (2014).
[Crossref]

H. Zhang, C. Jing, J. Yao, G. Li, B. Zeng, W. Chu, J. Ni, H. Xie, H. Xu, S. L. Chin, K. Yamanouchi, Y. Cheng, and Z. Xu, “Rotational Coherence Encoded in an “Air-Laser” Spectrum of Nitrogen Molecular Ions in an Intense Laser Field,” Phys. Rev. X 3(4), 041009 (2013).
[Crossref]

H. Zhang, C. Jing, G. Li, H. Xie, J. Yao, B. Zeng, W. Chu, J. Ni, H. Xu, and Y. Cheng, “Abnormal dependence of strong-field-ionization-induced nitrogen lasing on polarization ellipticity of the driving field,” Phys. Rev. A 88(6), 063417 (2013).
[Crossref]

J. Yao, G. Li, C. Jing, B. Zeng, W. Chu, J. Ni, H. Zhang, H. Xie, C. Zhang, H. Li, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Remote creation of coherent emissions in air with two-color ultrafast laser pulses,” New J. Phys. 15(2), 023046 (2013).
[Crossref]

J. Ni, W. Chu, C. Jing, H. Zhang, B. Zeng, J. Yao, G. Li, H. Xie, C. Zhang, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Identification of the physical mechanism of generation of coherent N2(+) emissions in air by femtosecond laser excitation,” Opt. Express 21(7), 8746–8752 (2013).
[Crossref] [PubMed]

J. Yao, B. Zeng, H. Xu, G. Li, W. Chu, J. Ni, H. Zhang, S. L. Chin, Y. Cheng, and Z. Xu, “High-brightness switchable multi-wavelength remote laser in air,” Phys. Rev. A 84(5), 051802 (2011).
[Crossref]

Zhang, C.

M. Britton, P. Laferrière, D. H. Ko, Z. Li, F. Kong, G. Brown, A. Naumov, C. Zhang, L. Arissian, and P. B. Corkum, “Testing the Role of Recollision in N2+ Air Lasing,” Phys. Rev. Lett. 120(13), 133208 (2018).
[Crossref] [PubMed]

J. Yao, G. Li, C. Jing, B. Zeng, W. Chu, J. Ni, H. Zhang, H. Xie, C. Zhang, H. Li, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Remote creation of coherent emissions in air with two-color ultrafast laser pulses,” New J. Phys. 15(2), 023046 (2013).
[Crossref]

J. Ni, W. Chu, C. Jing, H. Zhang, B. Zeng, J. Yao, G. Li, H. Xie, C. Zhang, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Identification of the physical mechanism of generation of coherent N2(+) emissions in air by femtosecond laser excitation,” Opt. Express 21(7), 8746–8752 (2013).
[Crossref] [PubMed]

Zhang, H.

G. Li, C. Jing, B. Zeng, H. Xie, J. Yao, W. Chu, J. Ni, H. Zhang, H. Xu, Y. Cheng, and Z. Xu, “Signature of superradiance from a nitrogen-gas plasma channel produced by strong-field ionization,” Phys. Rev. A 89(3), 033833 (2014).
[Crossref]

H. Xie, B. Zeng, G. Li, W. Chu, H. Zhang, C. Jing, J. Yao, J. Ni, Z. Wang, Z. Li, and Y. Cheng, “Coupling of N2+ rotational states in an air laser from tunnel-ionized nitrogen molecules,” Phys. Rev. A 90(4), 042504 (2014).
[Crossref]

H. Zhang, C. Jing, G. Li, H. Xie, J. Yao, B. Zeng, W. Chu, J. Ni, H. Xu, and Y. Cheng, “Abnormal dependence of strong-field-ionization-induced nitrogen lasing on polarization ellipticity of the driving field,” Phys. Rev. A 88(6), 063417 (2013).
[Crossref]

H. Zhang, C. Jing, J. Yao, G. Li, B. Zeng, W. Chu, J. Ni, H. Xie, H. Xu, S. L. Chin, K. Yamanouchi, Y. Cheng, and Z. Xu, “Rotational Coherence Encoded in an “Air-Laser” Spectrum of Nitrogen Molecular Ions in an Intense Laser Field,” Phys. Rev. X 3(4), 041009 (2013).
[Crossref]

J. Ni, W. Chu, C. Jing, H. Zhang, B. Zeng, J. Yao, G. Li, H. Xie, C. Zhang, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Identification of the physical mechanism of generation of coherent N2(+) emissions in air by femtosecond laser excitation,” Opt. Express 21(7), 8746–8752 (2013).
[Crossref] [PubMed]

J. Yao, G. Li, C. Jing, B. Zeng, W. Chu, J. Ni, H. Zhang, H. Xie, C. Zhang, H. Li, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Remote creation of coherent emissions in air with two-color ultrafast laser pulses,” New J. Phys. 15(2), 023046 (2013).
[Crossref]

J. Yao, B. Zeng, H. Xu, G. Li, W. Chu, J. Ni, H. Zhang, S. L. Chin, Y. Cheng, and Z. Xu, “High-brightness switchable multi-wavelength remote laser in air,” Phys. Rev. A 84(5), 051802 (2011).
[Crossref]

Zhang, L.

X. Zhong, Z. Miao, L. Zhang, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Optimizing the 391-nm lasing intensity from ionized nitrogen molecules in 800-nm femtosecond laser fields,” Phys. Rev. A 97(3), 033409 (2018).
[Crossref]

X. Zhong, Z. Miao, L. Zhang, Q. Liang, M. Lei, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Vibrational and electronic excitation of ionized nitrogen molecules in intense laser fields,” Phys. Rev. A 96(4), 043422 (2017).
[Crossref]

Zhang, X.

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Zhong, X.

X. Zhong, Z. Miao, L. Zhang, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Optimizing the 391-nm lasing intensity from ionized nitrogen molecules in 800-nm femtosecond laser fields,” Phys. Rev. A 97(3), 033409 (2018).
[Crossref]

X. Zhong, Z. Miao, L. Zhang, Q. Liang, M. Lei, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Vibrational and electronic excitation of ionized nitrogen molecules in intense laser fields,” Phys. Rev. A 96(4), 043422 (2017).
[Crossref]

Zhuang, S.

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Appl. Phys. B (1)

J. Yao, W. Chu, Z. Liu, J. Chen, B. Xu, and Y. Cheng, “An anatomy of strong-field ionization-induced air lasing,” Appl. Phys. B 124(5), 73 (2018).
[Crossref]

Chin. Opt. Lett. (1)

J. Phys. At. Mol. Opt. Phys. (1)

S. I. Mitryukovskiy, Y. Liu, A. Houard, and A. Mysyrowicz, “Re-evaluation of the peak intensity inside a femtosecond laser filament in air,” J. Phys. At. Mol. Opt. Phys. 48(9), 094003 (2015).
[Crossref]

Nat. Commun. (1)

H. Xu, E. Lötstedt, A. Iwasaki, and K. Yamanouchi, “Sub-10-fs population inversion in N2+ in air lasing through multiple state coupling,” Nat. Commun. 6(1), 8347 (2015).
[Crossref] [PubMed]

New J. Phys. (2)

J. Yao, G. Li, C. Jing, B. Zeng, W. Chu, J. Ni, H. Zhang, H. Xie, C. Zhang, H. Li, H. Xu, S. L. Chin, Y. Cheng, and Z. Xu, “Remote creation of coherent emissions in air with two-color ultrafast laser pulses,” New J. Phys. 15(2), 023046 (2013).
[Crossref]

J. Yao, W. Chu, Z. Liu, B. Xu, J. Chen, and Y. Cheng, “Generation of Raman lasers from nitrogen molecular ions driven by ultraintense laser fields,” New J. Phys. 20(3), 033035 (2018).
[Crossref]

Opt. Commun. (1)

L. Arissian, B. Kamer, and A. Rasoulof, “Effect of rotational wave packets on the stimulated emission of nitrogen with light filament,” Opt. Commun. 369, 215–219 (2016).
[Crossref]

Opt. Express (1)

Opt. Lett. (1)

Phys. Rev. A (10)

H. Xie, B. Zeng, G. Li, W. Chu, H. Zhang, C. Jing, J. Yao, J. Ni, Z. Wang, Z. Li, and Y. Cheng, “Coupling of N2+ rotational states in an air laser from tunnel-ionized nitrogen molecules,” Phys. Rev. A 90(4), 042504 (2014).
[Crossref]

H. Zhang, C. Jing, G. Li, H. Xie, J. Yao, B. Zeng, W. Chu, J. Ni, H. Xu, and Y. Cheng, “Abnormal dependence of strong-field-ionization-induced nitrogen lasing on polarization ellipticity of the driving field,” Phys. Rev. A 88(6), 063417 (2013).
[Crossref]

X. Zhong, Z. Miao, L. Zhang, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Optimizing the 391-nm lasing intensity from ionized nitrogen molecules in 800-nm femtosecond laser fields,” Phys. Rev. A 97(3), 033409 (2018).
[Crossref]

T. Wang, J. Daigle, J. Ju, S. Yuan, R. Li, and S. L. Chin, “Forward lasing action at multiple wavelengths seeded by white light from a femtosecond laser filament in air,” Phys. Rev. A 88(5), 053429 (2013).
[Crossref]

J. Yao, B. Zeng, H. Xu, G. Li, W. Chu, J. Ni, H. Zhang, S. L. Chin, Y. Cheng, and Z. Xu, “High-brightness switchable multi-wavelength remote laser in air,” Phys. Rev. A 84(5), 051802 (2011).
[Crossref]

P. Wang, C. Wu, M. Lei, B. Dai, H. Yang, H. Jiang, and Q. Gong, “Population dynamics of molecular nitrogen initiated by intense femtosecond laser pulses,” Phys. Rev. A 92(6), 063412 (2015).
[Crossref]

G. Li, C. Jing, B. Zeng, H. Xie, J. Yao, W. Chu, J. Ni, H. Zhang, H. Xu, Y. Cheng, and Z. Xu, “Signature of superradiance from a nitrogen-gas plasma channel produced by strong-field ionization,” Phys. Rev. A 89(3), 033833 (2014).
[Crossref]

X. Zhong, Z. Miao, L. Zhang, Q. Liang, M. Lei, H. Jiang, Y. Liu, Q. Gong, and C. Wu, “Vibrational and electronic excitation of ionized nitrogen molecules in intense laser fields,” Phys. Rev. A 96(4), 043422 (2017).
[Crossref]

A. Azarm, P. Corkum, and P. Polynkin, “Optical gain in rotationally excited nitrogen molecular ions,” Phys. Rev. A 96(5), 051401 (2017).
[Crossref]

H. Xu, E. Lötstedt, T. Ando, A. Iwasaki, and K. Yamanouchi, “Alignment-dependent population inversion in N2+ in intense few-cycle laser fields,” Phys. Rev. A 96(4), 041401 (2017).
[Crossref]

Phys. Rev. Lett. (5)

Z. Liu, J. Yao, J. Chen, B. Xu, W. Chu, and Y. Cheng, “Near-Resonant Raman Amplification in the Rotational Quantum Wave Packets of Nitrogen Molecular Ions Generated by Strong Field Ionization,” Phys. Rev. Lett. 120(8), 083205 (2018).
[Crossref] [PubMed]

Y. Liu, P. Ding, N. Ibrakovic, S. Bengtsson, S. Chen, R. Danylo, E. R. Simpson, E. W. Larsen, X. Zhang, Z. Fan, A. Houard, J. Mauritsson, A. L’Huillier, C. L. Arnold, S. Zhuang, V. Tikhonchuk, and A. Mysyrowicz, “Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration,” Phys. Rev. Lett. 119(20), 203205 (2017).
[Crossref] [PubMed]

Y. Liu, P. Ding, G. Lambert, A. Houard, V. Tikhonchuk, and A. Mysyrowicz, “Recollision-Induced Superradiance of Ionized Nitrogen Molecules,” Phys. Rev. Lett. 115(13), 133203 (2015).
[Crossref] [PubMed]

J. Yao, S. Jiang, W. Chu, B. Zeng, C. Wu, R. Lu, Z. Li, H. Xie, G. Li, C. Yu, Z. Wang, H. Jiang, Q. Gong, and Y. Cheng, “Population Redistribution Among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields,” Phys. Rev. Lett. 116(14), 143007 (2016).
[Crossref] [PubMed]

M. Britton, P. Laferrière, D. H. Ko, Z. Li, F. Kong, G. Brown, A. Naumov, C. Zhang, L. Arissian, and P. B. Corkum, “Testing the Role of Recollision in N2+ Air Lasing,” Phys. Rev. Lett. 120(13), 133208 (2018).
[Crossref] [PubMed]

Phys. Rev. X (1)

H. Zhang, C. Jing, J. Yao, G. Li, B. Zeng, W. Chu, J. Ni, H. Xie, H. Xu, S. L. Chin, K. Yamanouchi, Y. Cheng, and Z. Xu, “Rotational Coherence Encoded in an “Air-Laser” Spectrum of Nitrogen Molecular Ions in an Intense Laser Field,” Phys. Rev. X 3(4), 041009 (2013).
[Crossref]

Other (3)

G. Andriukaitis, J. Möhring, D. Kartashov, A. Pugžlys, A. Zheltikov, M. Motzkus, and A. Baltuška, “Intense, directional UV emission from molecular nitrogen ions in an adaptively controlled femtosecond filament,” in EPJ Web of Conferences41, 10004 (2013).
[Crossref]

D. Kartashov, S. Haessler, S. Ališauskas, G. Andriukaitis, A. Pugžlys, A. Baltuška, J. Möhring, D. Starukhin, M. Motzkus, A. M. Zheltikov, M. Richter, F. Morales, O. Smirnova, M. Yu. Ivanov, and M. Spanner, “Transient Inversion in Rotationally Aligned Nitrogen Ions in a Femtosecond Filament,” in Research in Optical Sciences, OSA Technical Digest (Optical Society of America, 2014), paper HTh4B.5.

L. Arissian, B. Kamer, A. Rastegari, D. Villeneuve, and J. C. Diels, “Transient gain from N2+ in light filaments,” https://arXiv:1802.00063 (2018).

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Figures (6)

Fig. 1
Fig. 1 Schematic diagram of the experimental setup.
Fig. 2
Fig. 2 The forward spectrum obtained by injecting (a) ~391 nm and (c) ~428 nm seed pulses into the plasma channel induced by the 800 nm pump laser. For comparison, the spectra of the seed pulses in the absence of the pump laser are indicated by red dashed lines. The evolution of the signal at (b) ~391 nm and (d) ~428 nm wavelength with the pump-probe delay. Note that the time scales in (b) and (d) are different.
Fig. 3
Fig. 3 Same measurements as in Fig. 2 but at the pump wavelength of 1500 nm. Inset in (c): the intensity of the ~428 nm lasing signal (blue solid line), the pump laser (black dotted line) and the seed pulse (red dashed line) as functions of the angle of GT3.
Fig. 4
Fig. 4 The forward spectra obtained by injecting ~428 nm seed pulses into the plasma channels produced by photoionization with the (a) 1300 nm and (b) 1800 nm pump laser pulses.
Fig. 5
Fig. 5 The evolution of the total population in the three electronic states of N 2 + ions as calculated with the (a) 800 nm and (c) 1500 nm pump laser field, and the evolution of the populations in B 2 Σ u + ( v ' = 0 ) , X 2 Σ g + ( v = 0 ) and X 2 Σ g + ( v = 1 ) states as calculated with the (b) 800 nm and (d) 1500 nm pump laser field.
Fig. 6
Fig. 6 The calculated populations in (a) B 2 Σ u + ( v ' = 0 ) and X 2 Σ g + ( v = 0 ) states, and that in (b) B 2 Σ u + ( v ' = 0 ) and X 2 Σ g + ( v = 1 ) states at the different pump wavelengths. The peak intensity and pulse duration are fixed at 2 × 1014 W/cm2 and 50 fs respectively at all the wavelengths.

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