Abstract

We report a new quantum path interference effect of electron trajectories in high-order harmonic generation (HHG) from two-center molecules, in which the interference minima are mainly located in the high-energy portion of HHG spectrum. The quantum calculations of the time-frequency analyses and the classical results of the electron trajectories demonstrate very good agreement and reveal that the positions of the interference minima are associated with the cutoff of various kinds of molecular electron trajectories. The interference fringes within a half optical cycle can be clearly seen in the time-frequency analysis spectrum. Moreover, the characteristics of both the HHG in frequency domain and the corresponding attosecond pulse generation in time domain permit tracing back the interference information of these electron trajectories. These interference phenomena offer new possibilities for getting insight into the attosecond electronic dynamics in molecules.

© 2010 OSA

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    [CrossRef]
  3. T. Pfeifer, A. Jullien, M. J. Abel, P. M. Nagel, L. Gallmann, D. M. Neumark, and S. R. Leone, “Generating coherent broadband continuum soft-x-ray radiation by attosecond ionization gating,” Opt. Express 15(25), 17120–17128 (2007).
    [CrossRef] [PubMed]
  4. P. H. Bucksbaum, “The future of attosecond spectroscopy,” Science 317(5839), 766–769 (2007).
    [CrossRef] [PubMed]
  5. E. Goulielmakis, V. S. Yakovlev, A. L. Cavalieri, M. Uiberacker, V. Pervak, A. Apolonski, R. Kienberger, U. Kleineberg, and F. Krausz, “Attosecond control and measurement: lightwave electronics,” Science 317(5839), 769–775 (2007).
    [CrossRef] [PubMed]
  6. H. Kapteyn, O. Cohen, I. Christov, and M. Murnane, “Harnessing attosecond science in the quest for coherent X-rays,” Science 317(5839), 775–778 (2007).
    [CrossRef] [PubMed]
  7. W. Yang and Zhizhan Xu, “Enhancement of ultrafast four-wave mixing in a polar molecule medium,” 14(16), 7216–7223 (2006).
  8. W. Yang, X. Song, S. Gong, Y. Cheng, and Z. Xu, “Carrier-envelope phase dependence of few-cycle ultrashort laser pulse propagation in a polar molecule medium,” Phys. Rev. Lett. 99(13), 133602 (2007).
    [CrossRef] [PubMed]
  9. M. Holler, A. Zaïr, F. Schapper, T. Auguste, E. Cormier, A. Wyatt, A. Monmayrant, I. A. Walmsley, L. Gallmann, P. Salières, and U. Keller, “Ionization effects on spectral signatures of quantum-path interference in high-harmonic generation,” Opt. Express 17(7), 5716–5722 (2009).
    [CrossRef] [PubMed]
  10. C. Winterfeldt, C. Spielmann, and G. Gerber, “Optimal control of high-harmonic generation,” Rev. Mod. Phys. 80(1), 117–140 (2008).
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  13. E. Goulielmakis, M. Schultze, M. Hofstetter, V. S. Yakovlev, J. Gagnon, M. Uiberacker, A. L. Aquila, E. M. Gullikson, D. T. Attwood, R. Kienberger, F. Krausz, and U. Kleineberg, “Single-cycle nonlinear optics,” Science 320(5883), 1614–1617 (2008).
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  14. W. Yang, X. Song, R. Li, and Z. Xu, “Generation of intense extreme supercontinuum radiation via resonant propagation effects,” Phys. Rev. A 78(2), 023836 (2008).
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  15. X. Song, Z. Zeng, Y. Fu, B. Cai, R. Li, Y. Cheng, and Z. Xu, “Quantum path control in few-optical-cycle regime,” Phys. Rev. A 76, 043830 (2007).
    [CrossRef]
  16. Z. Zeng, Y. Cheng, X. Song, R. Li, and Z. Xu, “Generation of an extreme ultraviolet supercontinuum in a two-color laser field,” Phys. Rev. Lett. 98(20), 203901 (2007).
    [CrossRef] [PubMed]
  17. H. Mashiko, S. Gilbertson, C. Li, S. D. Khan, M. M. Shakya, E. Moon, and Z. Chang, “Double optical gating of high-order harmonic generation with carrier-envelope phase stabilized lasers,” Phys. Rev. Lett. 100(10), 103906 (2008).
    [CrossRef] [PubMed]
  18. T. Pfeifer, L. Gallmann, M. J. Abel, P. M. Nagel, D. M. Neumark, and S. R. Leone, “Heterodyne mixing of laser fields for temporal gating of high-order harmonic generation,” Phys. Rev. Lett. 97(16), 163901 (2006).
    [CrossRef] [PubMed]
  19. A. Zaïr, M. Holler, A. Guandalini, F. Schapper, J. Biegert, L. Gallmann, U. Keller, A. S. Wyatt, A. Monmayrant, I. A. Walmsley, E. Cormier, T. Auguste, J. P. Caumes, and P. Salières, “Quantum path interferences in high-order harmonic generation,” Phys. Rev. Lett. 100(14), 143902 (2008).
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  20. A. D. Bandrauk, S. Barmaki, and G. L. Kamta, “Laser phase control of high-order harmonic generation at large internuclear distance: the H+ -H2+ system,” Phys. Rev. Lett. 98(1), 013001 (2007).
    [CrossRef] [PubMed]
  21. P. Moreno, L. Plaja, and L. Roso, “Ultrahigh harmonic generation from diatomic molecular ions in highly excited vibrational states,” Phys. Rev. A 55(3), R1593–R1596 (1997).
    [CrossRef]
  22. R. Kopold, W. Becker, and M. Kleber, “Model calculations of high-harmonic generation in molecular ions,” Phys. Rev. A 58(5), 4022–4038 (1998).
    [CrossRef]
  23. G. L. Kamta and A. D. Bandrauk, “High-order harmonic generation from two-center molecules: time-profile analysis of nuclear contributions,” Phys. Rev. A 70(1), 011404 (2004).
    [CrossRef]
  24. M. Lein, N. Hay, R. Velotta, J. P. Marangos, and P. L. Knight, “Role of the intramolecular phase in high-harmonic generation,” Phys. Rev. Lett. 88(18), 183903 (2002).
    [CrossRef] [PubMed]
  25. M. Lein, N. Hay, R. Velotta, J. P. Marangos, and P. L. Knight, “Interference effects in high-order harmonic generation with molecules,” Phys. Rev. A 66(2), 023805 (2002).
    [CrossRef]
  26. T. Kanai, S. Minemoto, and H. Sakai, “Quantum interference during high-order harmonic generation from aligned molecules,” Nature 435(7041), 470–474 (2005).
    [CrossRef] [PubMed]
  27. J. P. Marangos, “Ultrafast science: molecular structure in an instant,” Nature 435(7041), 435–435 (2005).
    [CrossRef] [PubMed]
  28. C. Vozzi, F. Calegari, E. Benedetti, J.-P. Caumes, G. Sansone, S. Stagira, M. Nisoli, R. Torres, E. Heesel, N. Kajumba, J. P. Marangos, C. Altucci, and R. Velotta, “Controlling two-center interference in molecular high harmonic generation,” Phys. Rev. Lett. 95(15), 153902 (2005).
    [CrossRef] [PubMed]
  29. J. Itatani, J. Levesque, D. Zeidler, H. Niikura, H. Pépin, J. C. Kieffer, P. B. Corkum, and D. M. Villeneuve, “Tomographic imaging of molecular orbitals,” Nature 432(7019), 867–871 (2004).
    [CrossRef] [PubMed]
  30. A-T. Le, X. M. Tong, and C. D. Lin, “Evidence of two-center interference in high-order harmonic generation from CO2,” Phys. Rev. 73(4), 041402 (2006).
  31. P. Liu, P. Yu, Z. Zeng, H. Xiong, X. Ge, R. Li, and Z. Xu, “Laser intensity dependence of high-order harmonic generation from aligned CO2 molecules,” Phys. Rev. A 78(1), 015802 (2008).
    [CrossRef]
  32. P. Wei, P. Liu, J. Chen, Z. Zeng, X. Guo, X. Ge, R. Li, and Z. Xu, “Laser-field-related recombination interference in high-order harmonic generation form CO2 molecules,” Phys. Rev. A 79(5), 053814 (2009).
    [CrossRef]
  33. G. L. Kamta and A. D. Bandrauk, “Three-dimensional time-profile analysis of high-order harmonic generation in molecules: nuclear interferences in H2+,” Phys. Rev. A 71(5), 053407 (2005).
    [CrossRef]
  34. C. Figueira de Morisson Faria, “High-order harmonic generation in diatomic molecules: a quantum-orbit analysis of the interference patterns,” Phys. Rev. A 76(4), 043407 (2007).
    [CrossRef]
  35. G. L. Kamta and A. D. Bandrauk, “Orbital symmetry and interference effects in molecular high-order harmonic generation,” Phys. Rev. 80(4), 041403 (2009).
    [CrossRef]
  36. H. Niikura, D. M. Villeneuve, and P. B. Corkum, “Mapping attosecond electron wave packet motion,” Phys. Rev. Lett. 94(8), 083003 (2005).
    [CrossRef] [PubMed]
  37. X. M. Tong and S. I. Chu, “Probing the spectral and temporal structures of high-order harmonic generation in intense laser pulses,” Phys. Rev. 61(2), 021802 (2000).
    [CrossRef]
  38. Th. Ergler, A. Rudenko, B. Feuerstein, K. Zrost, C. D. Schröter, R. Moshammer, and J. Ullrich, “Time-resolved imaging and manipulation of H2 fragmentation in intense laser fields,” Phys. Rev. Lett. 95(9), 093001 (2005).
    [CrossRef] [PubMed]
  39. C. C. Chirilă and M. Lein, “High-order above-threshold ionization in stretched molecules,” Phys. Rev. 74(5), 051401 (2006).
    [CrossRef]
  40. H. Stapelfeldt, H. Sakai, E. Constant, and P. B. Corkum, “Formation and measurement of molecular quantum picostructures,” Phys. Rev. A 55(5), R3319–R3322 (1997).
    [CrossRef]
  41. S. Kazamias and Ph. Balcou, “Intrinsic chip of attosecond pulses: single-atom model versus experiment,” Phys. Rev. A 69(6), 063416 (2004).
    [CrossRef]

2009

M. Holler, A. Zaïr, F. Schapper, T. Auguste, E. Cormier, A. Wyatt, A. Monmayrant, I. A. Walmsley, L. Gallmann, P. Salières, and U. Keller, “Ionization effects on spectral signatures of quantum-path interference in high-harmonic generation,” Opt. Express 17(7), 5716–5722 (2009).
[CrossRef] [PubMed]

P. Wei, P. Liu, J. Chen, Z. Zeng, X. Guo, X. Ge, R. Li, and Z. Xu, “Laser-field-related recombination interference in high-order harmonic generation form CO2 molecules,” Phys. Rev. A 79(5), 053814 (2009).
[CrossRef]

G. L. Kamta and A. D. Bandrauk, “Orbital symmetry and interference effects in molecular high-order harmonic generation,” Phys. Rev. 80(4), 041403 (2009).
[CrossRef]

2008

P. Liu, P. Yu, Z. Zeng, H. Xiong, X. Ge, R. Li, and Z. Xu, “Laser intensity dependence of high-order harmonic generation from aligned CO2 molecules,” Phys. Rev. A 78(1), 015802 (2008).
[CrossRef]

C. Winterfeldt, C. Spielmann, and G. Gerber, “Optimal control of high-harmonic generation,” Rev. Mod. Phys. 80(1), 117–140 (2008).
[CrossRef]

E. Goulielmakis, M. Schultze, M. Hofstetter, V. S. Yakovlev, J. Gagnon, M. Uiberacker, A. L. Aquila, E. M. Gullikson, D. T. Attwood, R. Kienberger, F. Krausz, and U. Kleineberg, “Single-cycle nonlinear optics,” Science 320(5883), 1614–1617 (2008).
[CrossRef] [PubMed]

W. Yang, X. Song, R. Li, and Z. Xu, “Generation of intense extreme supercontinuum radiation via resonant propagation effects,” Phys. Rev. A 78(2), 023836 (2008).
[CrossRef]

H. Mashiko, S. Gilbertson, C. Li, S. D. Khan, M. M. Shakya, E. Moon, and Z. Chang, “Double optical gating of high-order harmonic generation with carrier-envelope phase stabilized lasers,” Phys. Rev. Lett. 100(10), 103906 (2008).
[CrossRef] [PubMed]

A. Zaïr, M. Holler, A. Guandalini, F. Schapper, J. Biegert, L. Gallmann, U. Keller, A. S. Wyatt, A. Monmayrant, I. A. Walmsley, E. Cormier, T. Auguste, J. P. Caumes, and P. Salières, “Quantum path interferences in high-order harmonic generation,” Phys. Rev. Lett. 100(14), 143902 (2008).
[CrossRef] [PubMed]

2007

A. D. Bandrauk, S. Barmaki, and G. L. Kamta, “Laser phase control of high-order harmonic generation at large internuclear distance: the H+ -H2+ system,” Phys. Rev. Lett. 98(1), 013001 (2007).
[CrossRef] [PubMed]

X. Song, Z. Zeng, Y. Fu, B. Cai, R. Li, Y. Cheng, and Z. Xu, “Quantum path control in few-optical-cycle regime,” Phys. Rev. A 76, 043830 (2007).
[CrossRef]

Z. Zeng, Y. Cheng, X. Song, R. Li, and Z. Xu, “Generation of an extreme ultraviolet supercontinuum in a two-color laser field,” Phys. Rev. Lett. 98(20), 203901 (2007).
[CrossRef] [PubMed]

W. Yang, X. Song, S. Gong, Y. Cheng, and Z. Xu, “Carrier-envelope phase dependence of few-cycle ultrashort laser pulse propagation in a polar molecule medium,” Phys. Rev. Lett. 99(13), 133602 (2007).
[CrossRef] [PubMed]

M. Lein, “Molecular imaging using recolliding electrons,” J. Phys. B 40(16), R135–R173 (2007).
[CrossRef]

T. Pfeifer, A. Jullien, M. J. Abel, P. M. Nagel, L. Gallmann, D. M. Neumark, and S. R. Leone, “Generating coherent broadband continuum soft-x-ray radiation by attosecond ionization gating,” Opt. Express 15(25), 17120–17128 (2007).
[CrossRef] [PubMed]

P. H. Bucksbaum, “The future of attosecond spectroscopy,” Science 317(5839), 766–769 (2007).
[CrossRef] [PubMed]

E. Goulielmakis, V. S. Yakovlev, A. L. Cavalieri, M. Uiberacker, V. Pervak, A. Apolonski, R. Kienberger, U. Kleineberg, and F. Krausz, “Attosecond control and measurement: lightwave electronics,” Science 317(5839), 769–775 (2007).
[CrossRef] [PubMed]

H. Kapteyn, O. Cohen, I. Christov, and M. Murnane, “Harnessing attosecond science in the quest for coherent X-rays,” Science 317(5839), 775–778 (2007).
[CrossRef] [PubMed]

C. Figueira de Morisson Faria, “High-order harmonic generation in diatomic molecules: a quantum-orbit analysis of the interference patterns,” Phys. Rev. A 76(4), 043407 (2007).
[CrossRef]

P. B. Corkum and F. Krausz, “Attosecond science,” Nat. Phys. 3(6), 381–387 (2007).
[CrossRef]

2006

A-T. Le, X. M. Tong, and C. D. Lin, “Evidence of two-center interference in high-order harmonic generation from CO2,” Phys. Rev. 73(4), 041402 (2006).

W. Yang and Zhizhan Xu, “Enhancement of ultrafast four-wave mixing in a polar molecule medium,” 14(16), 7216–7223 (2006).

T. Pfeifer, L. Gallmann, M. J. Abel, P. M. Nagel, D. M. Neumark, and S. R. Leone, “Heterodyne mixing of laser fields for temporal gating of high-order harmonic generation,” Phys. Rev. Lett. 97(16), 163901 (2006).
[CrossRef] [PubMed]

C. C. Chirilă and M. Lein, “High-order above-threshold ionization in stretched molecules,” Phys. Rev. 74(5), 051401 (2006).
[CrossRef]

2005

G. L. Kamta and A. D. Bandrauk, “Three-dimensional time-profile analysis of high-order harmonic generation in molecules: nuclear interferences in H2+,” Phys. Rev. A 71(5), 053407 (2005).
[CrossRef]

Th. Ergler, A. Rudenko, B. Feuerstein, K. Zrost, C. D. Schröter, R. Moshammer, and J. Ullrich, “Time-resolved imaging and manipulation of H2 fragmentation in intense laser fields,” Phys. Rev. Lett. 95(9), 093001 (2005).
[CrossRef] [PubMed]

H. Niikura, D. M. Villeneuve, and P. B. Corkum, “Mapping attosecond electron wave packet motion,” Phys. Rev. Lett. 94(8), 083003 (2005).
[CrossRef] [PubMed]

T. Kanai, S. Minemoto, and H. Sakai, “Quantum interference during high-order harmonic generation from aligned molecules,” Nature 435(7041), 470–474 (2005).
[CrossRef] [PubMed]

J. P. Marangos, “Ultrafast science: molecular structure in an instant,” Nature 435(7041), 435–435 (2005).
[CrossRef] [PubMed]

C. Vozzi, F. Calegari, E. Benedetti, J.-P. Caumes, G. Sansone, S. Stagira, M. Nisoli, R. Torres, E. Heesel, N. Kajumba, J. P. Marangos, C. Altucci, and R. Velotta, “Controlling two-center interference in molecular high harmonic generation,” Phys. Rev. Lett. 95(15), 153902 (2005).
[CrossRef] [PubMed]

2004

J. Itatani, J. Levesque, D. Zeidler, H. Niikura, H. Pépin, J. C. Kieffer, P. B. Corkum, and D. M. Villeneuve, “Tomographic imaging of molecular orbitals,” Nature 432(7019), 867–871 (2004).
[CrossRef] [PubMed]

G. L. Kamta and A. D. Bandrauk, “High-order harmonic generation from two-center molecules: time-profile analysis of nuclear contributions,” Phys. Rev. A 70(1), 011404 (2004).
[CrossRef]

S. Kazamias and Ph. Balcou, “Intrinsic chip of attosecond pulses: single-atom model versus experiment,” Phys. Rev. A 69(6), 063416 (2004).
[CrossRef]

2002

M. Lein, N. Hay, R. Velotta, J. P. Marangos, and P. L. Knight, “Role of the intramolecular phase in high-harmonic generation,” Phys. Rev. Lett. 88(18), 183903 (2002).
[CrossRef] [PubMed]

M. Lein, N. Hay, R. Velotta, J. P. Marangos, and P. L. Knight, “Interference effects in high-order harmonic generation with molecules,” Phys. Rev. A 66(2), 023805 (2002).
[CrossRef]

2000

X. M. Tong and S. I. Chu, “Probing the spectral and temporal structures of high-order harmonic generation in intense laser pulses,” Phys. Rev. 61(2), 021802 (2000).
[CrossRef]

T. Brabec and F. Krausz, “Intense few-cycle laser field: frontiers of nonlinear optics,” Rev. Mod. Phys. 72(2), 545–591 (2000).
[CrossRef]

1998

R. Kopold, W. Becker, and M. Kleber, “Model calculations of high-harmonic generation in molecular ions,” Phys. Rev. A 58(5), 4022–4038 (1998).
[CrossRef]

1997

P. Moreno, L. Plaja, and L. Roso, “Ultrahigh harmonic generation from diatomic molecular ions in highly excited vibrational states,” Phys. Rev. A 55(3), R1593–R1596 (1997).
[CrossRef]

H. Stapelfeldt, H. Sakai, E. Constant, and P. B. Corkum, “Formation and measurement of molecular quantum picostructures,” Phys. Rev. A 55(5), R3319–R3322 (1997).
[CrossRef]

1993

P. B. Corkum, “Plasma perspective on strong field multiphoton ionization,” Phys. Rev. Lett. 71(13), 1994–1997 (1993).
[CrossRef] [PubMed]

Abel, M. J.

T. Pfeifer, A. Jullien, M. J. Abel, P. M. Nagel, L. Gallmann, D. M. Neumark, and S. R. Leone, “Generating coherent broadband continuum soft-x-ray radiation by attosecond ionization gating,” Opt. Express 15(25), 17120–17128 (2007).
[CrossRef] [PubMed]

T. Pfeifer, L. Gallmann, M. J. Abel, P. M. Nagel, D. M. Neumark, and S. R. Leone, “Heterodyne mixing of laser fields for temporal gating of high-order harmonic generation,” Phys. Rev. Lett. 97(16), 163901 (2006).
[CrossRef] [PubMed]

Altucci, C.

C. Vozzi, F. Calegari, E. Benedetti, J.-P. Caumes, G. Sansone, S. Stagira, M. Nisoli, R. Torres, E. Heesel, N. Kajumba, J. P. Marangos, C. Altucci, and R. Velotta, “Controlling two-center interference in molecular high harmonic generation,” Phys. Rev. Lett. 95(15), 153902 (2005).
[CrossRef] [PubMed]

Apolonski, A.

E. Goulielmakis, V. S. Yakovlev, A. L. Cavalieri, M. Uiberacker, V. Pervak, A. Apolonski, R. Kienberger, U. Kleineberg, and F. Krausz, “Attosecond control and measurement: lightwave electronics,” Science 317(5839), 769–775 (2007).
[CrossRef] [PubMed]

Aquila, A. L.

E. Goulielmakis, M. Schultze, M. Hofstetter, V. S. Yakovlev, J. Gagnon, M. Uiberacker, A. L. Aquila, E. M. Gullikson, D. T. Attwood, R. Kienberger, F. Krausz, and U. Kleineberg, “Single-cycle nonlinear optics,” Science 320(5883), 1614–1617 (2008).
[CrossRef] [PubMed]

Attwood, D. T.

E. Goulielmakis, M. Schultze, M. Hofstetter, V. S. Yakovlev, J. Gagnon, M. Uiberacker, A. L. Aquila, E. M. Gullikson, D. T. Attwood, R. Kienberger, F. Krausz, and U. Kleineberg, “Single-cycle nonlinear optics,” Science 320(5883), 1614–1617 (2008).
[CrossRef] [PubMed]

Auguste, T.

M. Holler, A. Zaïr, F. Schapper, T. Auguste, E. Cormier, A. Wyatt, A. Monmayrant, I. A. Walmsley, L. Gallmann, P. Salières, and U. Keller, “Ionization effects on spectral signatures of quantum-path interference in high-harmonic generation,” Opt. Express 17(7), 5716–5722 (2009).
[CrossRef] [PubMed]

A. Zaïr, M. Holler, A. Guandalini, F. Schapper, J. Biegert, L. Gallmann, U. Keller, A. S. Wyatt, A. Monmayrant, I. A. Walmsley, E. Cormier, T. Auguste, J. P. Caumes, and P. Salières, “Quantum path interferences in high-order harmonic generation,” Phys. Rev. Lett. 100(14), 143902 (2008).
[CrossRef] [PubMed]

Balcou, Ph.

S. Kazamias and Ph. Balcou, “Intrinsic chip of attosecond pulses: single-atom model versus experiment,” Phys. Rev. A 69(6), 063416 (2004).
[CrossRef]

Bandrauk, A. D.

G. L. Kamta and A. D. Bandrauk, “Orbital symmetry and interference effects in molecular high-order harmonic generation,” Phys. Rev. 80(4), 041403 (2009).
[CrossRef]

A. D. Bandrauk, S. Barmaki, and G. L. Kamta, “Laser phase control of high-order harmonic generation at large internuclear distance: the H+ -H2+ system,” Phys. Rev. Lett. 98(1), 013001 (2007).
[CrossRef] [PubMed]

G. L. Kamta and A. D. Bandrauk, “Three-dimensional time-profile analysis of high-order harmonic generation in molecules: nuclear interferences in H2+,” Phys. Rev. A 71(5), 053407 (2005).
[CrossRef]

G. L. Kamta and A. D. Bandrauk, “High-order harmonic generation from two-center molecules: time-profile analysis of nuclear contributions,” Phys. Rev. A 70(1), 011404 (2004).
[CrossRef]

Barmaki, S.

A. D. Bandrauk, S. Barmaki, and G. L. Kamta, “Laser phase control of high-order harmonic generation at large internuclear distance: the H+ -H2+ system,” Phys. Rev. Lett. 98(1), 013001 (2007).
[CrossRef] [PubMed]

Becker, W.

R. Kopold, W. Becker, and M. Kleber, “Model calculations of high-harmonic generation in molecular ions,” Phys. Rev. A 58(5), 4022–4038 (1998).
[CrossRef]

Benedetti, E.

C. Vozzi, F. Calegari, E. Benedetti, J.-P. Caumes, G. Sansone, S. Stagira, M. Nisoli, R. Torres, E. Heesel, N. Kajumba, J. P. Marangos, C. Altucci, and R. Velotta, “Controlling two-center interference in molecular high harmonic generation,” Phys. Rev. Lett. 95(15), 153902 (2005).
[CrossRef] [PubMed]

Biegert, J.

A. Zaïr, M. Holler, A. Guandalini, F. Schapper, J. Biegert, L. Gallmann, U. Keller, A. S. Wyatt, A. Monmayrant, I. A. Walmsley, E. Cormier, T. Auguste, J. P. Caumes, and P. Salières, “Quantum path interferences in high-order harmonic generation,” Phys. Rev. Lett. 100(14), 143902 (2008).
[CrossRef] [PubMed]

Brabec, T.

T. Brabec and F. Krausz, “Intense few-cycle laser field: frontiers of nonlinear optics,” Rev. Mod. Phys. 72(2), 545–591 (2000).
[CrossRef]

Bucksbaum, P. H.

P. H. Bucksbaum, “The future of attosecond spectroscopy,” Science 317(5839), 766–769 (2007).
[CrossRef] [PubMed]

Cai, B.

X. Song, Z. Zeng, Y. Fu, B. Cai, R. Li, Y. Cheng, and Z. Xu, “Quantum path control in few-optical-cycle regime,” Phys. Rev. A 76, 043830 (2007).
[CrossRef]

Calegari, F.

C. Vozzi, F. Calegari, E. Benedetti, J.-P. Caumes, G. Sansone, S. Stagira, M. Nisoli, R. Torres, E. Heesel, N. Kajumba, J. P. Marangos, C. Altucci, and R. Velotta, “Controlling two-center interference in molecular high harmonic generation,” Phys. Rev. Lett. 95(15), 153902 (2005).
[CrossRef] [PubMed]

Caumes, J. P.

A. Zaïr, M. Holler, A. Guandalini, F. Schapper, J. Biegert, L. Gallmann, U. Keller, A. S. Wyatt, A. Monmayrant, I. A. Walmsley, E. Cormier, T. Auguste, J. P. Caumes, and P. Salières, “Quantum path interferences in high-order harmonic generation,” Phys. Rev. Lett. 100(14), 143902 (2008).
[CrossRef] [PubMed]

Caumes, J.-P.

C. Vozzi, F. Calegari, E. Benedetti, J.-P. Caumes, G. Sansone, S. Stagira, M. Nisoli, R. Torres, E. Heesel, N. Kajumba, J. P. Marangos, C. Altucci, and R. Velotta, “Controlling two-center interference in molecular high harmonic generation,” Phys. Rev. Lett. 95(15), 153902 (2005).
[CrossRef] [PubMed]

Cavalieri, A. L.

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Th. Ergler, A. Rudenko, B. Feuerstein, K. Zrost, C. D. Schröter, R. Moshammer, and J. Ullrich, “Time-resolved imaging and manipulation of H2 fragmentation in intense laser fields,” Phys. Rev. Lett. 95(9), 093001 (2005).
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H. Kapteyn, O. Cohen, I. Christov, and M. Murnane, “Harnessing attosecond science in the quest for coherent X-rays,” Science 317(5839), 775–778 (2007).
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T. Pfeifer, A. Jullien, M. J. Abel, P. M. Nagel, L. Gallmann, D. M. Neumark, and S. R. Leone, “Generating coherent broadband continuum soft-x-ray radiation by attosecond ionization gating,” Opt. Express 15(25), 17120–17128 (2007).
[CrossRef] [PubMed]

T. Pfeifer, L. Gallmann, M. J. Abel, P. M. Nagel, D. M. Neumark, and S. R. Leone, “Heterodyne mixing of laser fields for temporal gating of high-order harmonic generation,” Phys. Rev. Lett. 97(16), 163901 (2006).
[CrossRef] [PubMed]

Neumark, D. M.

T. Pfeifer, A. Jullien, M. J. Abel, P. M. Nagel, L. Gallmann, D. M. Neumark, and S. R. Leone, “Generating coherent broadband continuum soft-x-ray radiation by attosecond ionization gating,” Opt. Express 15(25), 17120–17128 (2007).
[CrossRef] [PubMed]

T. Pfeifer, L. Gallmann, M. J. Abel, P. M. Nagel, D. M. Neumark, and S. R. Leone, “Heterodyne mixing of laser fields for temporal gating of high-order harmonic generation,” Phys. Rev. Lett. 97(16), 163901 (2006).
[CrossRef] [PubMed]

Niikura, H.

H. Niikura, D. M. Villeneuve, and P. B. Corkum, “Mapping attosecond electron wave packet motion,” Phys. Rev. Lett. 94(8), 083003 (2005).
[CrossRef] [PubMed]

J. Itatani, J. Levesque, D. Zeidler, H. Niikura, H. Pépin, J. C. Kieffer, P. B. Corkum, and D. M. Villeneuve, “Tomographic imaging of molecular orbitals,” Nature 432(7019), 867–871 (2004).
[CrossRef] [PubMed]

Nisoli, M.

C. Vozzi, F. Calegari, E. Benedetti, J.-P. Caumes, G. Sansone, S. Stagira, M. Nisoli, R. Torres, E. Heesel, N. Kajumba, J. P. Marangos, C. Altucci, and R. Velotta, “Controlling two-center interference in molecular high harmonic generation,” Phys. Rev. Lett. 95(15), 153902 (2005).
[CrossRef] [PubMed]

Pépin, H.

J. Itatani, J. Levesque, D. Zeidler, H. Niikura, H. Pépin, J. C. Kieffer, P. B. Corkum, and D. M. Villeneuve, “Tomographic imaging of molecular orbitals,” Nature 432(7019), 867–871 (2004).
[CrossRef] [PubMed]

Pervak, V.

E. Goulielmakis, V. S. Yakovlev, A. L. Cavalieri, M. Uiberacker, V. Pervak, A. Apolonski, R. Kienberger, U. Kleineberg, and F. Krausz, “Attosecond control and measurement: lightwave electronics,” Science 317(5839), 769–775 (2007).
[CrossRef] [PubMed]

Pfeifer, T.

T. Pfeifer, A. Jullien, M. J. Abel, P. M. Nagel, L. Gallmann, D. M. Neumark, and S. R. Leone, “Generating coherent broadband continuum soft-x-ray radiation by attosecond ionization gating,” Opt. Express 15(25), 17120–17128 (2007).
[CrossRef] [PubMed]

T. Pfeifer, L. Gallmann, M. J. Abel, P. M. Nagel, D. M. Neumark, and S. R. Leone, “Heterodyne mixing of laser fields for temporal gating of high-order harmonic generation,” Phys. Rev. Lett. 97(16), 163901 (2006).
[CrossRef] [PubMed]

Plaja, L.

P. Moreno, L. Plaja, and L. Roso, “Ultrahigh harmonic generation from diatomic molecular ions in highly excited vibrational states,” Phys. Rev. A 55(3), R1593–R1596 (1997).
[CrossRef]

Roso, L.

P. Moreno, L. Plaja, and L. Roso, “Ultrahigh harmonic generation from diatomic molecular ions in highly excited vibrational states,” Phys. Rev. A 55(3), R1593–R1596 (1997).
[CrossRef]

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Th. Ergler, A. Rudenko, B. Feuerstein, K. Zrost, C. D. Schröter, R. Moshammer, and J. Ullrich, “Time-resolved imaging and manipulation of H2 fragmentation in intense laser fields,” Phys. Rev. Lett. 95(9), 093001 (2005).
[CrossRef] [PubMed]

Sakai, H.

T. Kanai, S. Minemoto, and H. Sakai, “Quantum interference during high-order harmonic generation from aligned molecules,” Nature 435(7041), 470–474 (2005).
[CrossRef] [PubMed]

H. Stapelfeldt, H. Sakai, E. Constant, and P. B. Corkum, “Formation and measurement of molecular quantum picostructures,” Phys. Rev. A 55(5), R3319–R3322 (1997).
[CrossRef]

Salières, P.

M. Holler, A. Zaïr, F. Schapper, T. Auguste, E. Cormier, A. Wyatt, A. Monmayrant, I. A. Walmsley, L. Gallmann, P. Salières, and U. Keller, “Ionization effects on spectral signatures of quantum-path interference in high-harmonic generation,” Opt. Express 17(7), 5716–5722 (2009).
[CrossRef] [PubMed]

A. Zaïr, M. Holler, A. Guandalini, F. Schapper, J. Biegert, L. Gallmann, U. Keller, A. S. Wyatt, A. Monmayrant, I. A. Walmsley, E. Cormier, T. Auguste, J. P. Caumes, and P. Salières, “Quantum path interferences in high-order harmonic generation,” Phys. Rev. Lett. 100(14), 143902 (2008).
[CrossRef] [PubMed]

Sansone, G.

C. Vozzi, F. Calegari, E. Benedetti, J.-P. Caumes, G. Sansone, S. Stagira, M. Nisoli, R. Torres, E. Heesel, N. Kajumba, J. P. Marangos, C. Altucci, and R. Velotta, “Controlling two-center interference in molecular high harmonic generation,” Phys. Rev. Lett. 95(15), 153902 (2005).
[CrossRef] [PubMed]

Schapper, F.

M. Holler, A. Zaïr, F. Schapper, T. Auguste, E. Cormier, A. Wyatt, A. Monmayrant, I. A. Walmsley, L. Gallmann, P. Salières, and U. Keller, “Ionization effects on spectral signatures of quantum-path interference in high-harmonic generation,” Opt. Express 17(7), 5716–5722 (2009).
[CrossRef] [PubMed]

A. Zaïr, M. Holler, A. Guandalini, F. Schapper, J. Biegert, L. Gallmann, U. Keller, A. S. Wyatt, A. Monmayrant, I. A. Walmsley, E. Cormier, T. Auguste, J. P. Caumes, and P. Salières, “Quantum path interferences in high-order harmonic generation,” Phys. Rev. Lett. 100(14), 143902 (2008).
[CrossRef] [PubMed]

Schröter, C. D.

Th. Ergler, A. Rudenko, B. Feuerstein, K. Zrost, C. D. Schröter, R. Moshammer, and J. Ullrich, “Time-resolved imaging and manipulation of H2 fragmentation in intense laser fields,” Phys. Rev. Lett. 95(9), 093001 (2005).
[CrossRef] [PubMed]

Schultze, M.

E. Goulielmakis, M. Schultze, M. Hofstetter, V. S. Yakovlev, J. Gagnon, M. Uiberacker, A. L. Aquila, E. M. Gullikson, D. T. Attwood, R. Kienberger, F. Krausz, and U. Kleineberg, “Single-cycle nonlinear optics,” Science 320(5883), 1614–1617 (2008).
[CrossRef] [PubMed]

Shakya, M. M.

H. Mashiko, S. Gilbertson, C. Li, S. D. Khan, M. M. Shakya, E. Moon, and Z. Chang, “Double optical gating of high-order harmonic generation with carrier-envelope phase stabilized lasers,” Phys. Rev. Lett. 100(10), 103906 (2008).
[CrossRef] [PubMed]

Song, X.

W. Yang, X. Song, R. Li, and Z. Xu, “Generation of intense extreme supercontinuum radiation via resonant propagation effects,” Phys. Rev. A 78(2), 023836 (2008).
[CrossRef]

X. Song, Z. Zeng, Y. Fu, B. Cai, R. Li, Y. Cheng, and Z. Xu, “Quantum path control in few-optical-cycle regime,” Phys. Rev. A 76, 043830 (2007).
[CrossRef]

W. Yang, X. Song, S. Gong, Y. Cheng, and Z. Xu, “Carrier-envelope phase dependence of few-cycle ultrashort laser pulse propagation in a polar molecule medium,” Phys. Rev. Lett. 99(13), 133602 (2007).
[CrossRef] [PubMed]

Z. Zeng, Y. Cheng, X. Song, R. Li, and Z. Xu, “Generation of an extreme ultraviolet supercontinuum in a two-color laser field,” Phys. Rev. Lett. 98(20), 203901 (2007).
[CrossRef] [PubMed]

Spielmann, C.

C. Winterfeldt, C. Spielmann, and G. Gerber, “Optimal control of high-harmonic generation,” Rev. Mod. Phys. 80(1), 117–140 (2008).
[CrossRef]

Stagira, S.

C. Vozzi, F. Calegari, E. Benedetti, J.-P. Caumes, G. Sansone, S. Stagira, M. Nisoli, R. Torres, E. Heesel, N. Kajumba, J. P. Marangos, C. Altucci, and R. Velotta, “Controlling two-center interference in molecular high harmonic generation,” Phys. Rev. Lett. 95(15), 153902 (2005).
[CrossRef] [PubMed]

Stapelfeldt, H.

H. Stapelfeldt, H. Sakai, E. Constant, and P. B. Corkum, “Formation and measurement of molecular quantum picostructures,” Phys. Rev. A 55(5), R3319–R3322 (1997).
[CrossRef]

Tong, X. M.

A-T. Le, X. M. Tong, and C. D. Lin, “Evidence of two-center interference in high-order harmonic generation from CO2,” Phys. Rev. 73(4), 041402 (2006).

X. M. Tong and S. I. Chu, “Probing the spectral and temporal structures of high-order harmonic generation in intense laser pulses,” Phys. Rev. 61(2), 021802 (2000).
[CrossRef]

Torres, R.

C. Vozzi, F. Calegari, E. Benedetti, J.-P. Caumes, G. Sansone, S. Stagira, M. Nisoli, R. Torres, E. Heesel, N. Kajumba, J. P. Marangos, C. Altucci, and R. Velotta, “Controlling two-center interference in molecular high harmonic generation,” Phys. Rev. Lett. 95(15), 153902 (2005).
[CrossRef] [PubMed]

Uiberacker, M.

E. Goulielmakis, M. Schultze, M. Hofstetter, V. S. Yakovlev, J. Gagnon, M. Uiberacker, A. L. Aquila, E. M. Gullikson, D. T. Attwood, R. Kienberger, F. Krausz, and U. Kleineberg, “Single-cycle nonlinear optics,” Science 320(5883), 1614–1617 (2008).
[CrossRef] [PubMed]

E. Goulielmakis, V. S. Yakovlev, A. L. Cavalieri, M. Uiberacker, V. Pervak, A. Apolonski, R. Kienberger, U. Kleineberg, and F. Krausz, “Attosecond control and measurement: lightwave electronics,” Science 317(5839), 769–775 (2007).
[CrossRef] [PubMed]

Ullrich, J.

Th. Ergler, A. Rudenko, B. Feuerstein, K. Zrost, C. D. Schröter, R. Moshammer, and J. Ullrich, “Time-resolved imaging and manipulation of H2 fragmentation in intense laser fields,” Phys. Rev. Lett. 95(9), 093001 (2005).
[CrossRef] [PubMed]

Velotta, R.

C. Vozzi, F. Calegari, E. Benedetti, J.-P. Caumes, G. Sansone, S. Stagira, M. Nisoli, R. Torres, E. Heesel, N. Kajumba, J. P. Marangos, C. Altucci, and R. Velotta, “Controlling two-center interference in molecular high harmonic generation,” Phys. Rev. Lett. 95(15), 153902 (2005).
[CrossRef] [PubMed]

M. Lein, N. Hay, R. Velotta, J. P. Marangos, and P. L. Knight, “Role of the intramolecular phase in high-harmonic generation,” Phys. Rev. Lett. 88(18), 183903 (2002).
[CrossRef] [PubMed]

M. Lein, N. Hay, R. Velotta, J. P. Marangos, and P. L. Knight, “Interference effects in high-order harmonic generation with molecules,” Phys. Rev. A 66(2), 023805 (2002).
[CrossRef]

Villeneuve, D. M.

H. Niikura, D. M. Villeneuve, and P. B. Corkum, “Mapping attosecond electron wave packet motion,” Phys. Rev. Lett. 94(8), 083003 (2005).
[CrossRef] [PubMed]

J. Itatani, J. Levesque, D. Zeidler, H. Niikura, H. Pépin, J. C. Kieffer, P. B. Corkum, and D. M. Villeneuve, “Tomographic imaging of molecular orbitals,” Nature 432(7019), 867–871 (2004).
[CrossRef] [PubMed]

Vozzi, C.

C. Vozzi, F. Calegari, E. Benedetti, J.-P. Caumes, G. Sansone, S. Stagira, M. Nisoli, R. Torres, E. Heesel, N. Kajumba, J. P. Marangos, C. Altucci, and R. Velotta, “Controlling two-center interference in molecular high harmonic generation,” Phys. Rev. Lett. 95(15), 153902 (2005).
[CrossRef] [PubMed]

Walmsley, I. A.

M. Holler, A. Zaïr, F. Schapper, T. Auguste, E. Cormier, A. Wyatt, A. Monmayrant, I. A. Walmsley, L. Gallmann, P. Salières, and U. Keller, “Ionization effects on spectral signatures of quantum-path interference in high-harmonic generation,” Opt. Express 17(7), 5716–5722 (2009).
[CrossRef] [PubMed]

A. Zaïr, M. Holler, A. Guandalini, F. Schapper, J. Biegert, L. Gallmann, U. Keller, A. S. Wyatt, A. Monmayrant, I. A. Walmsley, E. Cormier, T. Auguste, J. P. Caumes, and P. Salières, “Quantum path interferences in high-order harmonic generation,” Phys. Rev. Lett. 100(14), 143902 (2008).
[CrossRef] [PubMed]

Wei, P.

P. Wei, P. Liu, J. Chen, Z. Zeng, X. Guo, X. Ge, R. Li, and Z. Xu, “Laser-field-related recombination interference in high-order harmonic generation form CO2 molecules,” Phys. Rev. A 79(5), 053814 (2009).
[CrossRef]

Winterfeldt, C.

C. Winterfeldt, C. Spielmann, and G. Gerber, “Optimal control of high-harmonic generation,” Rev. Mod. Phys. 80(1), 117–140 (2008).
[CrossRef]

Wyatt, A.

M. Holler, A. Zaïr, F. Schapper, T. Auguste, E. Cormier, A. Wyatt, A. Monmayrant, I. A. Walmsley, L. Gallmann, P. Salières, and U. Keller, “Ionization effects on spectral signatures of quantum-path interference in high-harmonic generation,” Opt. Express 17(7), 5716–5722 (2009).
[CrossRef] [PubMed]

Wyatt, A. S.

A. Zaïr, M. Holler, A. Guandalini, F. Schapper, J. Biegert, L. Gallmann, U. Keller, A. S. Wyatt, A. Monmayrant, I. A. Walmsley, E. Cormier, T. Auguste, J. P. Caumes, and P. Salières, “Quantum path interferences in high-order harmonic generation,” Phys. Rev. Lett. 100(14), 143902 (2008).
[CrossRef] [PubMed]

Xiong, H.

P. Liu, P. Yu, Z. Zeng, H. Xiong, X. Ge, R. Li, and Z. Xu, “Laser intensity dependence of high-order harmonic generation from aligned CO2 molecules,” Phys. Rev. A 78(1), 015802 (2008).
[CrossRef]

Xu, Z.

P. Wei, P. Liu, J. Chen, Z. Zeng, X. Guo, X. Ge, R. Li, and Z. Xu, “Laser-field-related recombination interference in high-order harmonic generation form CO2 molecules,” Phys. Rev. A 79(5), 053814 (2009).
[CrossRef]

P. Liu, P. Yu, Z. Zeng, H. Xiong, X. Ge, R. Li, and Z. Xu, “Laser intensity dependence of high-order harmonic generation from aligned CO2 molecules,” Phys. Rev. A 78(1), 015802 (2008).
[CrossRef]

W. Yang, X. Song, R. Li, and Z. Xu, “Generation of intense extreme supercontinuum radiation via resonant propagation effects,” Phys. Rev. A 78(2), 023836 (2008).
[CrossRef]

W. Yang, X. Song, S. Gong, Y. Cheng, and Z. Xu, “Carrier-envelope phase dependence of few-cycle ultrashort laser pulse propagation in a polar molecule medium,” Phys. Rev. Lett. 99(13), 133602 (2007).
[CrossRef] [PubMed]

X. Song, Z. Zeng, Y. Fu, B. Cai, R. Li, Y. Cheng, and Z. Xu, “Quantum path control in few-optical-cycle regime,” Phys. Rev. A 76, 043830 (2007).
[CrossRef]

Z. Zeng, Y. Cheng, X. Song, R. Li, and Z. Xu, “Generation of an extreme ultraviolet supercontinuum in a two-color laser field,” Phys. Rev. Lett. 98(20), 203901 (2007).
[CrossRef] [PubMed]

Xu, Zhizhan

W. Yang and Zhizhan Xu, “Enhancement of ultrafast four-wave mixing in a polar molecule medium,” 14(16), 7216–7223 (2006).

Yakovlev, V. S.

E. Goulielmakis, M. Schultze, M. Hofstetter, V. S. Yakovlev, J. Gagnon, M. Uiberacker, A. L. Aquila, E. M. Gullikson, D. T. Attwood, R. Kienberger, F. Krausz, and U. Kleineberg, “Single-cycle nonlinear optics,” Science 320(5883), 1614–1617 (2008).
[CrossRef] [PubMed]

E. Goulielmakis, V. S. Yakovlev, A. L. Cavalieri, M. Uiberacker, V. Pervak, A. Apolonski, R. Kienberger, U. Kleineberg, and F. Krausz, “Attosecond control and measurement: lightwave electronics,” Science 317(5839), 769–775 (2007).
[CrossRef] [PubMed]

Yang, W.

W. Yang, X. Song, R. Li, and Z. Xu, “Generation of intense extreme supercontinuum radiation via resonant propagation effects,” Phys. Rev. A 78(2), 023836 (2008).
[CrossRef]

W. Yang, X. Song, S. Gong, Y. Cheng, and Z. Xu, “Carrier-envelope phase dependence of few-cycle ultrashort laser pulse propagation in a polar molecule medium,” Phys. Rev. Lett. 99(13), 133602 (2007).
[CrossRef] [PubMed]

W. Yang and Zhizhan Xu, “Enhancement of ultrafast four-wave mixing in a polar molecule medium,” 14(16), 7216–7223 (2006).

Yu, P.

P. Liu, P. Yu, Z. Zeng, H. Xiong, X. Ge, R. Li, and Z. Xu, “Laser intensity dependence of high-order harmonic generation from aligned CO2 molecules,” Phys. Rev. A 78(1), 015802 (2008).
[CrossRef]

Zaïr, A.

M. Holler, A. Zaïr, F. Schapper, T. Auguste, E. Cormier, A. Wyatt, A. Monmayrant, I. A. Walmsley, L. Gallmann, P. Salières, and U. Keller, “Ionization effects on spectral signatures of quantum-path interference in high-harmonic generation,” Opt. Express 17(7), 5716–5722 (2009).
[CrossRef] [PubMed]

A. Zaïr, M. Holler, A. Guandalini, F. Schapper, J. Biegert, L. Gallmann, U. Keller, A. S. Wyatt, A. Monmayrant, I. A. Walmsley, E. Cormier, T. Auguste, J. P. Caumes, and P. Salières, “Quantum path interferences in high-order harmonic generation,” Phys. Rev. Lett. 100(14), 143902 (2008).
[CrossRef] [PubMed]

Zeidler, D.

J. Itatani, J. Levesque, D. Zeidler, H. Niikura, H. Pépin, J. C. Kieffer, P. B. Corkum, and D. M. Villeneuve, “Tomographic imaging of molecular orbitals,” Nature 432(7019), 867–871 (2004).
[CrossRef] [PubMed]

Zeng, Z.

P. Wei, P. Liu, J. Chen, Z. Zeng, X. Guo, X. Ge, R. Li, and Z. Xu, “Laser-field-related recombination interference in high-order harmonic generation form CO2 molecules,” Phys. Rev. A 79(5), 053814 (2009).
[CrossRef]

P. Liu, P. Yu, Z. Zeng, H. Xiong, X. Ge, R. Li, and Z. Xu, “Laser intensity dependence of high-order harmonic generation from aligned CO2 molecules,” Phys. Rev. A 78(1), 015802 (2008).
[CrossRef]

Z. Zeng, Y. Cheng, X. Song, R. Li, and Z. Xu, “Generation of an extreme ultraviolet supercontinuum in a two-color laser field,” Phys. Rev. Lett. 98(20), 203901 (2007).
[CrossRef] [PubMed]

X. Song, Z. Zeng, Y. Fu, B. Cai, R. Li, Y. Cheng, and Z. Xu, “Quantum path control in few-optical-cycle regime,” Phys. Rev. A 76, 043830 (2007).
[CrossRef]

Zrost, K.

Th. Ergler, A. Rudenko, B. Feuerstein, K. Zrost, C. D. Schröter, R. Moshammer, and J. Ullrich, “Time-resolved imaging and manipulation of H2 fragmentation in intense laser fields,” Phys. Rev. Lett. 95(9), 093001 (2005).
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J. Phys. B

M. Lein, “Molecular imaging using recolliding electrons,” J. Phys. B 40(16), R135–R173 (2007).
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Nat. Phys.

P. B. Corkum and F. Krausz, “Attosecond science,” Nat. Phys. 3(6), 381–387 (2007).
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Nature

J. Itatani, J. Levesque, D. Zeidler, H. Niikura, H. Pépin, J. C. Kieffer, P. B. Corkum, and D. M. Villeneuve, “Tomographic imaging of molecular orbitals,” Nature 432(7019), 867–871 (2004).
[CrossRef] [PubMed]

T. Kanai, S. Minemoto, and H. Sakai, “Quantum interference during high-order harmonic generation from aligned molecules,” Nature 435(7041), 470–474 (2005).
[CrossRef] [PubMed]

J. P. Marangos, “Ultrafast science: molecular structure in an instant,” Nature 435(7041), 435–435 (2005).
[CrossRef] [PubMed]

Opt. Express

T. Pfeifer, A. Jullien, M. J. Abel, P. M. Nagel, L. Gallmann, D. M. Neumark, and S. R. Leone, “Generating coherent broadband continuum soft-x-ray radiation by attosecond ionization gating,” Opt. Express 15(25), 17120–17128 (2007).
[CrossRef] [PubMed]

M. Holler, A. Zaïr, F. Schapper, T. Auguste, E. Cormier, A. Wyatt, A. Monmayrant, I. A. Walmsley, L. Gallmann, P. Salières, and U. Keller, “Ionization effects on spectral signatures of quantum-path interference in high-harmonic generation,” Opt. Express 17(7), 5716–5722 (2009).
[CrossRef] [PubMed]

Phys. Rev.

G. L. Kamta and A. D. Bandrauk, “Orbital symmetry and interference effects in molecular high-order harmonic generation,” Phys. Rev. 80(4), 041403 (2009).
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X. M. Tong and S. I. Chu, “Probing the spectral and temporal structures of high-order harmonic generation in intense laser pulses,” Phys. Rev. 61(2), 021802 (2000).
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C. C. Chirilă and M. Lein, “High-order above-threshold ionization in stretched molecules,” Phys. Rev. 74(5), 051401 (2006).
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A-T. Le, X. M. Tong, and C. D. Lin, “Evidence of two-center interference in high-order harmonic generation from CO2,” Phys. Rev. 73(4), 041402 (2006).

Phys. Rev. A

P. Liu, P. Yu, Z. Zeng, H. Xiong, X. Ge, R. Li, and Z. Xu, “Laser intensity dependence of high-order harmonic generation from aligned CO2 molecules,” Phys. Rev. A 78(1), 015802 (2008).
[CrossRef]

P. Wei, P. Liu, J. Chen, Z. Zeng, X. Guo, X. Ge, R. Li, and Z. Xu, “Laser-field-related recombination interference in high-order harmonic generation form CO2 molecules,” Phys. Rev. A 79(5), 053814 (2009).
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G. L. Kamta and A. D. Bandrauk, “Three-dimensional time-profile analysis of high-order harmonic generation in molecules: nuclear interferences in H2+,” Phys. Rev. A 71(5), 053407 (2005).
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C. Figueira de Morisson Faria, “High-order harmonic generation in diatomic molecules: a quantum-orbit analysis of the interference patterns,” Phys. Rev. A 76(4), 043407 (2007).
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M. Lein, N. Hay, R. Velotta, J. P. Marangos, and P. L. Knight, “Interference effects in high-order harmonic generation with molecules,” Phys. Rev. A 66(2), 023805 (2002).
[CrossRef]

H. Stapelfeldt, H. Sakai, E. Constant, and P. B. Corkum, “Formation and measurement of molecular quantum picostructures,” Phys. Rev. A 55(5), R3319–R3322 (1997).
[CrossRef]

S. Kazamias and Ph. Balcou, “Intrinsic chip of attosecond pulses: single-atom model versus experiment,” Phys. Rev. A 69(6), 063416 (2004).
[CrossRef]

W. Yang, X. Song, R. Li, and Z. Xu, “Generation of intense extreme supercontinuum radiation via resonant propagation effects,” Phys. Rev. A 78(2), 023836 (2008).
[CrossRef]

X. Song, Z. Zeng, Y. Fu, B. Cai, R. Li, Y. Cheng, and Z. Xu, “Quantum path control in few-optical-cycle regime,” Phys. Rev. A 76, 043830 (2007).
[CrossRef]

P. Moreno, L. Plaja, and L. Roso, “Ultrahigh harmonic generation from diatomic molecular ions in highly excited vibrational states,” Phys. Rev. A 55(3), R1593–R1596 (1997).
[CrossRef]

R. Kopold, W. Becker, and M. Kleber, “Model calculations of high-harmonic generation in molecular ions,” Phys. Rev. A 58(5), 4022–4038 (1998).
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G. L. Kamta and A. D. Bandrauk, “High-order harmonic generation from two-center molecules: time-profile analysis of nuclear contributions,” Phys. Rev. A 70(1), 011404 (2004).
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Phys. Rev. Lett.

M. Lein, N. Hay, R. Velotta, J. P. Marangos, and P. L. Knight, “Role of the intramolecular phase in high-harmonic generation,” Phys. Rev. Lett. 88(18), 183903 (2002).
[CrossRef] [PubMed]

Z. Zeng, Y. Cheng, X. Song, R. Li, and Z. Xu, “Generation of an extreme ultraviolet supercontinuum in a two-color laser field,” Phys. Rev. Lett. 98(20), 203901 (2007).
[CrossRef] [PubMed]

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Figures (3)

Fig. 1
Fig. 1

(color online). (a) (d) (g) The HHG spectra generated in H 2 + ; the corresponding emitted energy of the electrons returning to the ion as a function of time: (b) (e) (h) the quantum time-frequency analysis results; and (c) (f) (i) the classical calculation results. (a) (b) (c) the internuclear distance is R=6 a.u. and the laser intensity is I=5.0×1014 W/cm2; (d) (e) (f) R=18 a.u. and I=5.0×1014 W/cm2; (g) (h) (i) R=18 a.u. and I=4.5×1014 W/cm2.

Fig. 2
Fig. 2

(color online). (a) The HHG spectrum driven by the 1.5-cycle pulse, the corresponding emitted energy of the electrons returning to the ion as a function of time: (b) the classical trajectory calculation results, (c) the quantum time-frequency analysis results, and (d) the electron excursion time as a function of the harmonic order.

Fig. 3
Fig. 3

(color online).The temporal profiles of attosecond pulses generated by blocking the low energy photons below (a) 77th harmonic, (b) 73rd harmonic, and (c) 63rd harmonic of the HHG spectrum in Fig. 2(a).

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