Abstract

The intensity enhancement of harmonics and change in harmonic profiles have been observed in a few plasma plumes (La, In, Mn) under variable phase modulation of Ti:sapphire laser pulses. It is seen that variation of relative harmonic intensities in the plateau region could be achieved by chirp variation of narrowband (10nm bandwidth) radiation. The effect of the self-phase modulation (SPM) of broadband (20nm bandwidth) laser radiation on the harmonic emission from nanoparticles, C60, and Ag plasma while passing through a glass slab is also studied. The observation of broadband harmonic emission and redshift in harmonic wavelengths for an unchirped laser pulse are explained in terms of SPM. The observation of blueshift of harmonic radiation with both positively and negatively chirped pulses was attributed to the different effects of SPM on the chirped pulses.

© 2009 Optical Society of America

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    [CrossRef]
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    [CrossRef]
  23. H. Xu, X. Tang, and P. Lambropoulos, “Nonperturbative theory of harmonic generation in helium under a high-intensity laser field: the role of intermediate resonance and of the ion,” Phys. Rev. A 46, R2225-R2228 (1992).
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  24. E. S. Toma, P. Antoine, A. de Bohan, and H. G. Muller, “Resonance-enhanced high-harmonic generation,” J. Phys. B 32, 5843-5852 (1999).
    [CrossRef]
  25. R. Taïeb, V. Véniard, J. Wassaf, and A. Maquet, “Roles of resonances and recollisions in strong-field atomic phenomena. II. High-order harmonic generation,” Phys. Rev. A 68, 033403 (2003).
    [CrossRef]
  26. D. B. Milošević and W. Becker, “Role of long quantum orbits in high-order harmonic generation,” Phys. Rev. A 66, 063417 (2002).
    [CrossRef]
  27. H. Puell and C. R. Vidal, “Nonlinear polarizations and excitations and their time dependence in discrete multilevel systems,” Phys. Rev. A 14, 2225-2239 (1976).
    [CrossRef]
  28. J.-C. Diels and A. T. Georges, “Coherent two-photon resonant third- and fifth-harmonic vacuum-ultraviolet generation in metal vapors,” Phys. Rev. A 19, 1589-1606 (1979).
    [CrossRef]
  29. D. B. Milošević, E. Hasović, S. Odžak, M. Busuladžić, A. Gazibegović-Busuladžić, and W. Becker, “Wavelength dependence of channel-closing enhancements in high-order above-threshold ionization and harmonic generation,” J. Mod. Opt. 55, 2653-2663 (2008).
    [CrossRef]
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    [CrossRef]
  31. D. B. Milošević, “High-energy stimulated emission from plasma ablation pumped by resonant high-order harmonic generation,” J. Phys. B 40, 3367-3376 (2007).
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  32. D. Kilbane, E. T. Kennedy, J.-P. Mosnier, P. van Kampen, and J. T. Costello, “On the 3p-subshell photoabsorption spectra of iron-group ions: the case of Mn2+,” J. Phys. B 38, L1-L8 (2005).
    [CrossRef]
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    [CrossRef]
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    [CrossRef]
  35. R. A. Ganeev, M. Suzuki, M. Baba, M. Ichihara, and H. Kuroda, “High-order harmonic generation in Ag nanoparticle-contained plasma,” J. Phys. B 41, 045603 (2008).
    [CrossRef]
  36. R. A. Ganeev, M. Suzuki, M. Baba, M. Ichihara, and H. Kuroda, “Low- and high-order nonlinear optical properties of Au, Pt, Pd, and Ru nanoparticles,” J. Appl. Phys. 103, 063102 (2008).
    [CrossRef]
  37. R. A. Ganeev, M. Suzuki, M. Baba, and H. Kuroda, “Analysis of the nonlinear self-interaction of femtosecond pulses during high-order harmonic generation in laser-produced plasma,” J. Opt. Soc. Am. B 23, 1332-1337 (2006).
    [CrossRef]
  38. I. J. Kim, G. H. Lee, S. B. Park, Y. S. Lee, T. K. Kim, C. H. Nam, T. Mocek, and K. Jakubczak, “Generation of submicrojoule high harmonics using a long gas jet in a two-color laser field,” Appl. Phys. Lett. 92, 021125 (2008).
    [CrossRef]

2009 (1)

R. A. Ganeev, L. B. Elouga Bom, J. Abdul-Hadi, M. C. H. Wong, J. P. Brichta, V. R. Bhardwaj, and T. Ozaki, “High-order harmonic generation from fullerene using the plasma harmonic method,” Phys. Rev. Lett. 102, 013903 (2009).
[CrossRef] [PubMed]

2008 (7)

D. B. Milošević, E. Hasović, S. Odžak, M. Busuladžić, A. Gazibegović-Busuladžić, and W. Becker, “Wavelength dependence of channel-closing enhancements in high-order above-threshold ionization and harmonic generation,” J. Mod. Opt. 55, 2653-2663 (2008).
[CrossRef]

R. A. Ganeev, M. Suzuki, M. Baba, M. Ichihara, and H. Kuroda, “Low- and high-order nonlinear optical properties of BaTiO3 and SrTiO3 nanoparticles,” J. Opt. Soc. Am. B 25, 325-333 (2008).
[CrossRef]

R. A. Ganeev, M. Suzuki, M. Baba, M. Ichihara, and H. Kuroda, “High-order harmonic generation in Ag nanoparticle-contained plasma,” J. Phys. B 41, 045603 (2008).
[CrossRef]

R. A. Ganeev, M. Suzuki, M. Baba, M. Ichihara, and H. Kuroda, “Low- and high-order nonlinear optical properties of Au, Pt, Pd, and Ru nanoparticles,” J. Appl. Phys. 103, 063102 (2008).
[CrossRef]

C. Winterfeldt, C. Spielmann, and G. Gerber, “Colloquium: optimal control of high-harmonic generation,” Rev. Mod. Phys. 80, 117-141 (2008).
[CrossRef]

X. Zhang, A. L. Lytle, O. Cohen, M. M. Murnane, and H. C. Kapteyn, “Quantum-path control in high-order harmonic generation at high photon energies,” New J. Phys. 10, 025021 (2008).
[CrossRef]

I. J. Kim, G. H. Lee, S. B. Park, Y. S. Lee, T. K. Kim, C. H. Nam, T. Mocek, and K. Jakubczak, “Generation of submicrojoule high harmonics using a long gas jet in a two-color laser field,” Appl. Phys. Lett. 92, 021125 (2008).
[CrossRef]

2007 (8)

R. A. Ganeev, L. B. Elouga Bom, J.-C. Kieffer, and T. Ozaki, “Demonstration of the 101st harmonic generated from laser-produced manganese plasma,” Phys. Rev. A 76, 023831 (2007).
[CrossRef]

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

R. A. Ganeev, “High-order harmonic generation in laser plasma: a review of recent achievements,” J. Phys. B 40, R213-R253 (2007).
[CrossRef]

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

R. A. Ganeev, P. A. Naik, H. Singhal, J. A. Chakera, and P. D. Gupta, “Strong enhancement and extinction of single harmonic intensity in the mid- and end-plateau regions of the high harmonics generated in low-excited laser plasmas,” Opt. Lett. 32, 65-67 (2007).
[CrossRef]

R. A. Ganeev, L. B. Elouga Bom, J.-C. Kieffer, and T. Ozaki, “Systematic investigation of resonance-induced single harmonic enhancement in the extreme ultraviolet range,” Phys. Rev. A 75, 063806 (2007).
[CrossRef]

D. B. Milošević, “High-energy stimulated emission from plasma ablation pumped by resonant high-order harmonic generation,” J. Phys. B 40, 3367-3376 (2007).
[CrossRef]

R. A. Ganeev, P. A. Naik, H. Singhal, J. A. Chakera, and P. D. Gupta, “Tuning of the high-order harmonics generated from laser plasma plumes and solid surfaces by varying the laser spectrum, chirp, and focal position,” J. Opt. Soc. Am. B 24, 1138-1141 (2007).
[CrossRef]

2006 (7)

R. A. Ganeev, H. Singhal, P. A. Naik, V. Arora, U. Chakravarty, J. A. Chakera, R. A. Khan, P. V. Redkin, M. Raghuramaiah, and P. D. Gupta, “Single harmonic enhancement by controlling the chirp of the driving laser pulse during high-order harmonic generation from GaAs plasma,” J. Opt. Soc. Am. B 23, 2535-2540 (2006).
[CrossRef]

D. B. Milošević, “Theoretical analysis of high-order harmonic generation from a coherent superposition of states,” J. Opt. Soc. Am. B 23, 308-317 (2006).
[CrossRef]

R. A. Ganeev, M. Suzuki, M. Baba, and H. Kuroda, “Analysis of the nonlinear self-interaction of femtosecond pulses during high-order harmonic generation in laser-produced plasma,” J. Opt. Soc. Am. B 23, 1332-1337 (2006).
[CrossRef]

R. A. Ganeev, M. Suzuki, T. Ozaki, M. Baba, and H. Kuroda, “Strong resonance enhancement of a single harmonic generated in extreme ultraviolet range,” Opt. Lett. 31, 1699-1701 (2006).
[CrossRef] [PubMed]

R. A. Ganeev, H. Singhal, P. A. Naik, V. Arora, U. Chakravarty, J. A. Chakera, R. A. Khan, I. A. Kulagin, P. V. Redkin, M. Raghuramaiah, and P. D. Gupta, “Harmonic generation from indium-rich plasmas,” Phys. Rev. A 74, 063824 (2006).
[CrossRef]

C. A. Froud, E. T. F. Rogers, D. C. Hanna, W. S. Brocklesby, M. Praeger, A. M. de Paula, J. J. Baumberg, and J. G. Frey, “Soft-x-ray wavelength shift induced by ionization effects in a capillary,” Opt. Lett. 31, 374-376 (2006).
[CrossRef] [PubMed]

H. T. Kim, V. Tosa, and C. H. Nam, “Synchronized generation of bright high-order harmonics using self-guided and chirped femtosecond laser pulses,” J. Phys. B 39, S265-S274 (2006).
[CrossRef]

2005 (3)

V. Tosa, H. T. Kim, I. J. Kim, and C. H. Nam, “High-order harmonic generation by chirped and self-guided femtosecond laser pulses. II. Time-frequency analysis,” Phys. Rev. A 71, 063808 (2005).
[CrossRef]

D. Kilbane, E. T. Kennedy, J.-P. Mosnier, P. van Kampen, and J. T. Costello, “On the 3p-subshell photoabsorption spectra of iron-group ions: the case of Mn2+,” J. Phys. B 38, L1-L8 (2005).
[CrossRef]

I. J. Kim, C. M. Kim, H. T. Kim, G. H. Lee, Y. S. Lee, J. Y. Park, D. J. Cho, and C. H. Nam, “Highly efficient high-harmonic generation in an orthogonally polarized two-color laser field,” Phys. Rev. Lett. 94, 243901 (2005).
[CrossRef]

2004 (1)

2003 (2)

J. B. West, J. E. Hansen, B. Kristensen, F. Folkmann, and H. Kjeldsen, “Revised interpretation of the photoionization of Cr+ in the 3p excitation region,” J. Phys. B 36, L327-L334 (2003).
[CrossRef]

R. Taïeb, V. Véniard, J. Wassaf, and A. Maquet, “Roles of resonances and recollisions in strong-field atomic phenomena. II. High-order harmonic generation,” Phys. Rev. A 68, 033403 (2003).
[CrossRef]

2002 (2)

D. B. Milošević and W. Becker, “Role of long quantum orbits in high-order harmonic generation,” Phys. Rev. A 66, 063417 (2002).
[CrossRef]

B. Shan, A. Cavalieri, and Z. Chang, “Tunable high harmonic generation with an optical parametric amplifier,” Appl. Phys. B: Photophys. Laser Chem. 74, S23-S26 (2002).
[CrossRef]

2001 (1)

P. Salières, B. Carré, L. Le Déroff, F. Grasbon, G. G. Paulus, H. Walther, R. Kopold, W. Becker, D. B. Milošević, A. Sanpera, and M. Lewenstein, “Feynman's path-integral approach for intense laser-atom interactions,” Science 292, 902-905 (2001).
[CrossRef] [PubMed]

2000 (1)

A. von dem Borne, R. L. Johnson, B. Sonntag, M. Talkenberg, A. Verweyen, P. Wernet, J. Schulz, K. Tiedtke, Ch. Gerth, B. Obst, P. Zimmermann, and J. E. Hansen, “Suppression of the low-spin multiplet components in the 3p photoelectron spectra of atomic and solid 3d metals,” Phys. Rev. A 62, 052703 (2000).
[CrossRef]

1999 (1)

E. S. Toma, P. Antoine, A. de Bohan, and H. G. Muller, “Resonance-enhanced high-harmonic generation,” J. Phys. B 32, 5843-5852 (1999).
[CrossRef]

1998 (1)

Z. Chang, A. Rundquist, H. Wang, I. Christov, H. C. Kapteyn, and M. M. Murnane, “Temporal phase control of soft-x-ray harmonic emission,” Phys. Rev. A 58, R30-R38 (1998).
[CrossRef]

1992 (1)

H. Xu, X. Tang, and P. Lambropoulos, “Nonperturbative theory of harmonic generation in helium under a high-intensity laser field: the role of intermediate resonance and of the ion,” Phys. Rev. A 46, R2225-R2228 (1992).
[CrossRef] [PubMed]

1979 (1)

J.-C. Diels and A. T. Georges, “Coherent two-photon resonant third- and fifth-harmonic vacuum-ultraviolet generation in metal vapors,” Phys. Rev. A 19, 1589-1606 (1979).
[CrossRef]

1976 (1)

H. Puell and C. R. Vidal, “Nonlinear polarizations and excitations and their time dependence in discrete multilevel systems,” Phys. Rev. A 14, 2225-2239 (1976).
[CrossRef]

Abdul-Hadi, J.

R. A. Ganeev, L. B. Elouga Bom, J. Abdul-Hadi, M. C. H. Wong, J. P. Brichta, V. R. Bhardwaj, and T. Ozaki, “High-order harmonic generation from fullerene using the plasma harmonic method,” Phys. Rev. Lett. 102, 013903 (2009).
[CrossRef] [PubMed]

Albert, O.

Antoine, P.

E. S. Toma, P. Antoine, A. de Bohan, and H. G. Muller, “Resonance-enhanced high-harmonic generation,” J. Phys. B 32, 5843-5852 (1999).
[CrossRef]

Arora, V.

R. A. Ganeev, H. Singhal, P. A. Naik, V. Arora, U. Chakravarty, J. A. Chakera, R. A. Khan, P. V. Redkin, M. Raghuramaiah, and P. D. Gupta, “Single harmonic enhancement by controlling the chirp of the driving laser pulse during high-order harmonic generation from GaAs plasma,” J. Opt. Soc. Am. B 23, 2535-2540 (2006).
[CrossRef]

R. A. Ganeev, H. Singhal, P. A. Naik, V. Arora, U. Chakravarty, J. A. Chakera, R. A. Khan, I. A. Kulagin, P. V. Redkin, M. Raghuramaiah, and P. D. Gupta, “Harmonic generation from indium-rich plasmas,” Phys. Rev. A 74, 063824 (2006).
[CrossRef]

Augé, F.

Baba, M.

Balcou, P.

Baumberg, J. J.

Becker, W.

D. B. Milošević, E. Hasović, S. Odžak, M. Busuladžić, A. Gazibegović-Busuladžić, and W. Becker, “Wavelength dependence of channel-closing enhancements in high-order above-threshold ionization and harmonic generation,” J. Mod. Opt. 55, 2653-2663 (2008).
[CrossRef]

D. B. Milošević and W. Becker, “Role of long quantum orbits in high-order harmonic generation,” Phys. Rev. A 66, 063417 (2002).
[CrossRef]

P. Salières, B. Carré, L. Le Déroff, F. Grasbon, G. G. Paulus, H. Walther, R. Kopold, W. Becker, D. B. Milošević, A. Sanpera, and M. Lewenstein, “Feynman's path-integral approach for intense laser-atom interactions,” Science 292, 902-905 (2001).
[CrossRef] [PubMed]

Bellei, C.

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

Bhardwaj, V. R.

R. A. Ganeev, L. B. Elouga Bom, J. Abdul-Hadi, M. C. H. Wong, J. P. Brichta, V. R. Bhardwaj, and T. Ozaki, “High-order harmonic generation from fullerene using the plasma harmonic method,” Phys. Rev. Lett. 102, 013903 (2009).
[CrossRef] [PubMed]

Brichta, J. P.

R. A. Ganeev, L. B. Elouga Bom, J. Abdul-Hadi, M. C. H. Wong, J. P. Brichta, V. R. Bhardwaj, and T. Ozaki, “High-order harmonic generation from fullerene using the plasma harmonic method,” Phys. Rev. Lett. 102, 013903 (2009).
[CrossRef] [PubMed]

Brocklesby, W. S.

Busuladžic, M.

D. B. Milošević, E. Hasović, S. Odžak, M. Busuladžić, A. Gazibegović-Busuladžić, and W. Becker, “Wavelength dependence of channel-closing enhancements in high-order above-threshold ionization and harmonic generation,” J. Mod. Opt. 55, 2653-2663 (2008).
[CrossRef]

Carré, B.

P. Salières, B. Carré, L. Le Déroff, F. Grasbon, G. G. Paulus, H. Walther, R. Kopold, W. Becker, D. B. Milošević, A. Sanpera, and M. Lewenstein, “Feynman's path-integral approach for intense laser-atom interactions,” Science 292, 902-905 (2001).
[CrossRef] [PubMed]

Carroll, D. C.

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

Cavalieri, A.

B. Shan, A. Cavalieri, and Z. Chang, “Tunable high harmonic generation with an optical parametric amplifier,” Appl. Phys. B: Photophys. Laser Chem. 74, S23-S26 (2002).
[CrossRef]

Chakera, J. A.

Chakravarty, U.

R. A. Ganeev, H. Singhal, P. A. Naik, V. Arora, U. Chakravarty, J. A. Chakera, R. A. Khan, I. A. Kulagin, P. V. Redkin, M. Raghuramaiah, and P. D. Gupta, “Harmonic generation from indium-rich plasmas,” Phys. Rev. A 74, 063824 (2006).
[CrossRef]

R. A. Ganeev, H. Singhal, P. A. Naik, V. Arora, U. Chakravarty, J. A. Chakera, R. A. Khan, P. V. Redkin, M. Raghuramaiah, and P. D. Gupta, “Single harmonic enhancement by controlling the chirp of the driving laser pulse during high-order harmonic generation from GaAs plasma,” J. Opt. Soc. Am. B 23, 2535-2540 (2006).
[CrossRef]

Chambaret, J. P.

Chang, Z.

B. Shan, A. Cavalieri, and Z. Chang, “Tunable high harmonic generation with an optical parametric amplifier,” Appl. Phys. B: Photophys. Laser Chem. 74, S23-S26 (2002).
[CrossRef]

Z. Chang, A. Rundquist, H. Wang, I. Christov, H. C. Kapteyn, and M. M. Murnane, “Temporal phase control of soft-x-ray harmonic emission,” Phys. Rev. A 58, R30-R38 (1998).
[CrossRef]

Cho, D. J.

I. J. Kim, C. M. Kim, H. T. Kim, G. H. Lee, Y. S. Lee, J. Y. Park, D. J. Cho, and C. H. Nam, “Highly efficient high-harmonic generation in an orthogonally polarized two-color laser field,” Phys. Rev. Lett. 94, 243901 (2005).
[CrossRef]

Christov, I.

Z. Chang, A. Rundquist, H. Wang, I. Christov, H. C. Kapteyn, and M. M. Murnane, “Temporal phase control of soft-x-ray harmonic emission,” Phys. Rev. A 58, R30-R38 (1998).
[CrossRef]

Clarke, R. J.

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

Cohen, O.

X. Zhang, A. L. Lytle, O. Cohen, M. M. Murnane, and H. C. Kapteyn, “Quantum-path control in high-order harmonic generation at high photon energies,” New J. Phys. 10, 025021 (2008).
[CrossRef]

Corkum, P. B.

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

Costello, J. T.

D. Kilbane, E. T. Kennedy, J.-P. Mosnier, P. van Kampen, and J. T. Costello, “On the 3p-subshell photoabsorption spectra of iron-group ions: the case of Mn2+,” J. Phys. B 38, L1-L8 (2005).
[CrossRef]

de Bohan, A.

E. S. Toma, P. Antoine, A. de Bohan, and H. G. Muller, “Resonance-enhanced high-harmonic generation,” J. Phys. B 32, 5843-5852 (1999).
[CrossRef]

de Paula, A. M.

Diels, J.-C.

J.-C. Diels and A. T. Georges, “Coherent two-photon resonant third- and fifth-harmonic vacuum-ultraviolet generation in metal vapors,” Phys. Rev. A 19, 1589-1606 (1979).
[CrossRef]

Douillet, D.

Dromey, B.

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

Elouga Bom, L. B.

R. A. Ganeev, L. B. Elouga Bom, J. Abdul-Hadi, M. C. H. Wong, J. P. Brichta, V. R. Bhardwaj, and T. Ozaki, “High-order harmonic generation from fullerene using the plasma harmonic method,” Phys. Rev. Lett. 102, 013903 (2009).
[CrossRef] [PubMed]

R. A. Ganeev, L. B. Elouga Bom, J.-C. Kieffer, and T. Ozaki, “Demonstration of the 101st harmonic generated from laser-produced manganese plasma,” Phys. Rev. A 76, 023831 (2007).
[CrossRef]

R. A. Ganeev, L. B. Elouga Bom, J.-C. Kieffer, and T. Ozaki, “Systematic investigation of resonance-induced single harmonic enhancement in the extreme ultraviolet range,” Phys. Rev. A 75, 063806 (2007).
[CrossRef]

Folkmann, F.

J. B. West, J. E. Hansen, B. Kristensen, F. Folkmann, and H. Kjeldsen, “Revised interpretation of the photoionization of Cr+ in the 3p excitation region,” J. Phys. B 36, L327-L334 (2003).
[CrossRef]

Frey, J. G.

Froud, C. A.

Ganeev, R. A.

R. A. Ganeev, L. B. Elouga Bom, J. Abdul-Hadi, M. C. H. Wong, J. P. Brichta, V. R. Bhardwaj, and T. Ozaki, “High-order harmonic generation from fullerene using the plasma harmonic method,” Phys. Rev. Lett. 102, 013903 (2009).
[CrossRef] [PubMed]

R. A. Ganeev, M. Suzuki, M. Baba, M. Ichihara, and H. Kuroda, “Low- and high-order nonlinear optical properties of Au, Pt, Pd, and Ru nanoparticles,” J. Appl. Phys. 103, 063102 (2008).
[CrossRef]

R. A. Ganeev, M. Suzuki, M. Baba, M. Ichihara, and H. Kuroda, “High-order harmonic generation in Ag nanoparticle-contained plasma,” J. Phys. B 41, 045603 (2008).
[CrossRef]

R. A. Ganeev, M. Suzuki, M. Baba, M. Ichihara, and H. Kuroda, “Low- and high-order nonlinear optical properties of BaTiO3 and SrTiO3 nanoparticles,” J. Opt. Soc. Am. B 25, 325-333 (2008).
[CrossRef]

R. A. Ganeev, P. A. Naik, H. Singhal, J. A. Chakera, and P. D. Gupta, “Tuning of the high-order harmonics generated from laser plasma plumes and solid surfaces by varying the laser spectrum, chirp, and focal position,” J. Opt. Soc. Am. B 24, 1138-1141 (2007).
[CrossRef]

R. A. Ganeev, L. B. Elouga Bom, J.-C. Kieffer, and T. Ozaki, “Demonstration of the 101st harmonic generated from laser-produced manganese plasma,” Phys. Rev. A 76, 023831 (2007).
[CrossRef]

R. A. Ganeev, L. B. Elouga Bom, J.-C. Kieffer, and T. Ozaki, “Systematic investigation of resonance-induced single harmonic enhancement in the extreme ultraviolet range,” Phys. Rev. A 75, 063806 (2007).
[CrossRef]

R. A. Ganeev, “High-order harmonic generation in laser plasma: a review of recent achievements,” J. Phys. B 40, R213-R253 (2007).
[CrossRef]

R. A. Ganeev, P. A. Naik, H. Singhal, J. A. Chakera, and P. D. Gupta, “Strong enhancement and extinction of single harmonic intensity in the mid- and end-plateau regions of the high harmonics generated in low-excited laser plasmas,” Opt. Lett. 32, 65-67 (2007).
[CrossRef]

R. A. Ganeev, M. Suzuki, T. Ozaki, M. Baba, and H. Kuroda, “Strong resonance enhancement of a single harmonic generated in extreme ultraviolet range,” Opt. Lett. 31, 1699-1701 (2006).
[CrossRef] [PubMed]

R. A. Ganeev, H. Singhal, P. A. Naik, V. Arora, U. Chakravarty, J. A. Chakera, R. A. Khan, I. A. Kulagin, P. V. Redkin, M. Raghuramaiah, and P. D. Gupta, “Harmonic generation from indium-rich plasmas,” Phys. Rev. A 74, 063824 (2006).
[CrossRef]

R. A. Ganeev, H. Singhal, P. A. Naik, V. Arora, U. Chakravarty, J. A. Chakera, R. A. Khan, P. V. Redkin, M. Raghuramaiah, and P. D. Gupta, “Single harmonic enhancement by controlling the chirp of the driving laser pulse during high-order harmonic generation from GaAs plasma,” J. Opt. Soc. Am. B 23, 2535-2540 (2006).
[CrossRef]

R. A. Ganeev, M. Suzuki, M. Baba, and H. Kuroda, “Analysis of the nonlinear self-interaction of femtosecond pulses during high-order harmonic generation in laser-produced plasma,” J. Opt. Soc. Am. B 23, 1332-1337 (2006).
[CrossRef]

Gazibegovic-Busuladžic, A.

D. B. Milošević, E. Hasović, S. Odžak, M. Busuladžić, A. Gazibegović-Busuladžić, and W. Becker, “Wavelength dependence of channel-closing enhancements in high-order above-threshold ionization and harmonic generation,” J. Mod. Opt. 55, 2653-2663 (2008).
[CrossRef]

Georges, A. T.

J.-C. Diels and A. T. Georges, “Coherent two-photon resonant third- and fifth-harmonic vacuum-ultraviolet generation in metal vapors,” Phys. Rev. A 19, 1589-1606 (1979).
[CrossRef]

Gerber, G.

C. Winterfeldt, C. Spielmann, and G. Gerber, “Colloquium: optimal control of high-harmonic generation,” Rev. Mod. Phys. 80, 117-141 (2008).
[CrossRef]

Gerth, Ch.

A. von dem Borne, R. L. Johnson, B. Sonntag, M. Talkenberg, A. Verweyen, P. Wernet, J. Schulz, K. Tiedtke, Ch. Gerth, B. Obst, P. Zimmermann, and J. E. Hansen, “Suppression of the low-spin multiplet components in the 3p photoelectron spectra of atomic and solid 3d metals,” Phys. Rev. A 62, 052703 (2000).
[CrossRef]

Grasbon, F.

P. Salières, B. Carré, L. Le Déroff, F. Grasbon, G. G. Paulus, H. Walther, R. Kopold, W. Becker, D. B. Milošević, A. Sanpera, and M. Lewenstein, “Feynman's path-integral approach for intense laser-atom interactions,” Science 292, 902-905 (2001).
[CrossRef] [PubMed]

Green, J. S.

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

Gupta, P. D.

Hanna, D. C.

Hansen, J. E.

J. B. West, J. E. Hansen, B. Kristensen, F. Folkmann, and H. Kjeldsen, “Revised interpretation of the photoionization of Cr+ in the 3p excitation region,” J. Phys. B 36, L327-L334 (2003).
[CrossRef]

A. von dem Borne, R. L. Johnson, B. Sonntag, M. Talkenberg, A. Verweyen, P. Wernet, J. Schulz, K. Tiedtke, Ch. Gerth, B. Obst, P. Zimmermann, and J. E. Hansen, “Suppression of the low-spin multiplet components in the 3p photoelectron spectra of atomic and solid 3d metals,” Phys. Rev. A 62, 052703 (2000).
[CrossRef]

Hasovic, E.

D. B. Milošević, E. Hasović, S. Odžak, M. Busuladžić, A. Gazibegović-Busuladžić, and W. Becker, “Wavelength dependence of channel-closing enhancements in high-order above-threshold ionization and harmonic generation,” J. Mod. Opt. 55, 2653-2663 (2008).
[CrossRef]

Hulin, D.

Ichihara, M.

R. A. Ganeev, M. Suzuki, M. Baba, M. Ichihara, and H. Kuroda, “Low- and high-order nonlinear optical properties of BaTiO3 and SrTiO3 nanoparticles,” J. Opt. Soc. Am. B 25, 325-333 (2008).
[CrossRef]

R. A. Ganeev, M. Suzuki, M. Baba, M. Ichihara, and H. Kuroda, “Low- and high-order nonlinear optical properties of Au, Pt, Pd, and Ru nanoparticles,” J. Appl. Phys. 103, 063102 (2008).
[CrossRef]

R. A. Ganeev, M. Suzuki, M. Baba, M. Ichihara, and H. Kuroda, “High-order harmonic generation in Ag nanoparticle-contained plasma,” J. Phys. B 41, 045603 (2008).
[CrossRef]

Jakubczak, K.

I. J. Kim, G. H. Lee, S. B. Park, Y. S. Lee, T. K. Kim, C. H. Nam, T. Mocek, and K. Jakubczak, “Generation of submicrojoule high harmonics using a long gas jet in a two-color laser field,” Appl. Phys. Lett. 92, 021125 (2008).
[CrossRef]

Johnson, R. L.

A. von dem Borne, R. L. Johnson, B. Sonntag, M. Talkenberg, A. Verweyen, P. Wernet, J. Schulz, K. Tiedtke, Ch. Gerth, B. Obst, P. Zimmermann, and J. E. Hansen, “Suppression of the low-spin multiplet components in the 3p photoelectron spectra of atomic and solid 3d metals,” Phys. Rev. A 62, 052703 (2000).
[CrossRef]

Kapteyn, H. C.

X. Zhang, A. L. Lytle, O. Cohen, M. M. Murnane, and H. C. Kapteyn, “Quantum-path control in high-order harmonic generation at high photon energies,” New J. Phys. 10, 025021 (2008).
[CrossRef]

Z. Chang, A. Rundquist, H. Wang, I. Christov, H. C. Kapteyn, and M. M. Murnane, “Temporal phase control of soft-x-ray harmonic emission,” Phys. Rev. A 58, R30-R38 (1998).
[CrossRef]

Kar, S.

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

Kazamias, S.

Kennedy, E. T.

D. Kilbane, E. T. Kennedy, J.-P. Mosnier, P. van Kampen, and J. T. Costello, “On the 3p-subshell photoabsorption spectra of iron-group ions: the case of Mn2+,” J. Phys. B 38, L1-L8 (2005).
[CrossRef]

Khan, R. A.

R. A. Ganeev, H. Singhal, P. A. Naik, V. Arora, U. Chakravarty, J. A. Chakera, R. A. Khan, I. A. Kulagin, P. V. Redkin, M. Raghuramaiah, and P. D. Gupta, “Harmonic generation from indium-rich plasmas,” Phys. Rev. A 74, 063824 (2006).
[CrossRef]

R. A. Ganeev, H. Singhal, P. A. Naik, V. Arora, U. Chakravarty, J. A. Chakera, R. A. Khan, P. V. Redkin, M. Raghuramaiah, and P. D. Gupta, “Single harmonic enhancement by controlling the chirp of the driving laser pulse during high-order harmonic generation from GaAs plasma,” J. Opt. Soc. Am. B 23, 2535-2540 (2006).
[CrossRef]

Kieffer, J.-C.

R. A. Ganeev, L. B. Elouga Bom, J.-C. Kieffer, and T. Ozaki, “Demonstration of the 101st harmonic generated from laser-produced manganese plasma,” Phys. Rev. A 76, 023831 (2007).
[CrossRef]

R. A. Ganeev, L. B. Elouga Bom, J.-C. Kieffer, and T. Ozaki, “Systematic investigation of resonance-induced single harmonic enhancement in the extreme ultraviolet range,” Phys. Rev. A 75, 063806 (2007).
[CrossRef]

Kilbane, D.

D. Kilbane, E. T. Kennedy, J.-P. Mosnier, P. van Kampen, and J. T. Costello, “On the 3p-subshell photoabsorption spectra of iron-group ions: the case of Mn2+,” J. Phys. B 38, L1-L8 (2005).
[CrossRef]

Kim, C. M.

I. J. Kim, C. M. Kim, H. T. Kim, G. H. Lee, Y. S. Lee, J. Y. Park, D. J. Cho, and C. H. Nam, “Highly efficient high-harmonic generation in an orthogonally polarized two-color laser field,” Phys. Rev. Lett. 94, 243901 (2005).
[CrossRef]

Kim, H. T.

H. T. Kim, V. Tosa, and C. H. Nam, “Synchronized generation of bright high-order harmonics using self-guided and chirped femtosecond laser pulses,” J. Phys. B 39, S265-S274 (2006).
[CrossRef]

V. Tosa, H. T. Kim, I. J. Kim, and C. H. Nam, “High-order harmonic generation by chirped and self-guided femtosecond laser pulses. II. Time-frequency analysis,” Phys. Rev. A 71, 063808 (2005).
[CrossRef]

I. J. Kim, C. M. Kim, H. T. Kim, G. H. Lee, Y. S. Lee, J. Y. Park, D. J. Cho, and C. H. Nam, “Highly efficient high-harmonic generation in an orthogonally polarized two-color laser field,” Phys. Rev. Lett. 94, 243901 (2005).
[CrossRef]

Kim, I. J.

I. J. Kim, G. H. Lee, S. B. Park, Y. S. Lee, T. K. Kim, C. H. Nam, T. Mocek, and K. Jakubczak, “Generation of submicrojoule high harmonics using a long gas jet in a two-color laser field,” Appl. Phys. Lett. 92, 021125 (2008).
[CrossRef]

I. J. Kim, C. M. Kim, H. T. Kim, G. H. Lee, Y. S. Lee, J. Y. Park, D. J. Cho, and C. H. Nam, “Highly efficient high-harmonic generation in an orthogonally polarized two-color laser field,” Phys. Rev. Lett. 94, 243901 (2005).
[CrossRef]

V. Tosa, H. T. Kim, I. J. Kim, and C. H. Nam, “High-order harmonic generation by chirped and self-guided femtosecond laser pulses. II. Time-frequency analysis,” Phys. Rev. A 71, 063808 (2005).
[CrossRef]

Kim, T. K.

I. J. Kim, G. H. Lee, S. B. Park, Y. S. Lee, T. K. Kim, C. H. Nam, T. Mocek, and K. Jakubczak, “Generation of submicrojoule high harmonics using a long gas jet in a two-color laser field,” Appl. Phys. Lett. 92, 021125 (2008).
[CrossRef]

Kjeldsen, H.

J. B. West, J. E. Hansen, B. Kristensen, F. Folkmann, and H. Kjeldsen, “Revised interpretation of the photoionization of Cr+ in the 3p excitation region,” J. Phys. B 36, L327-L334 (2003).
[CrossRef]

Kneip, S.

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

Kopold, R.

P. Salières, B. Carré, L. Le Déroff, F. Grasbon, G. G. Paulus, H. Walther, R. Kopold, W. Becker, D. B. Milošević, A. Sanpera, and M. Lewenstein, “Feynman's path-integral approach for intense laser-atom interactions,” Science 292, 902-905 (2001).
[CrossRef] [PubMed]

Krausz, F.

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

Kristensen, B.

J. B. West, J. E. Hansen, B. Kristensen, F. Folkmann, and H. Kjeldsen, “Revised interpretation of the photoionization of Cr+ in the 3p excitation region,” J. Phys. B 36, L327-L334 (2003).
[CrossRef]

Krushelnick, K.

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

Kulagin, I. A.

R. A. Ganeev, H. Singhal, P. A. Naik, V. Arora, U. Chakravarty, J. A. Chakera, R. A. Khan, I. A. Kulagin, P. V. Redkin, M. Raghuramaiah, and P. D. Gupta, “Harmonic generation from indium-rich plasmas,” Phys. Rev. A 74, 063824 (2006).
[CrossRef]

Kuroda, H.

Lambropoulos, P.

H. Xu, X. Tang, and P. Lambropoulos, “Nonperturbative theory of harmonic generation in helium under a high-intensity laser field: the role of intermediate resonance and of the ion,” Phys. Rev. A 46, R2225-R2228 (1992).
[CrossRef] [PubMed]

Le Déroff, L.

P. Salières, B. Carré, L. Le Déroff, F. Grasbon, G. G. Paulus, H. Walther, R. Kopold, W. Becker, D. B. Milošević, A. Sanpera, and M. Lewenstein, “Feynman's path-integral approach for intense laser-atom interactions,” Science 292, 902-905 (2001).
[CrossRef] [PubMed]

Lee, G. H.

I. J. Kim, G. H. Lee, S. B. Park, Y. S. Lee, T. K. Kim, C. H. Nam, T. Mocek, and K. Jakubczak, “Generation of submicrojoule high harmonics using a long gas jet in a two-color laser field,” Appl. Phys. Lett. 92, 021125 (2008).
[CrossRef]

I. J. Kim, C. M. Kim, H. T. Kim, G. H. Lee, Y. S. Lee, J. Y. Park, D. J. Cho, and C. H. Nam, “Highly efficient high-harmonic generation in an orthogonally polarized two-color laser field,” Phys. Rev. Lett. 94, 243901 (2005).
[CrossRef]

Lee, Y. S.

I. J. Kim, G. H. Lee, S. B. Park, Y. S. Lee, T. K. Kim, C. H. Nam, T. Mocek, and K. Jakubczak, “Generation of submicrojoule high harmonics using a long gas jet in a two-color laser field,” Appl. Phys. Lett. 92, 021125 (2008).
[CrossRef]

I. J. Kim, C. M. Kim, H. T. Kim, G. H. Lee, Y. S. Lee, J. Y. Park, D. J. Cho, and C. H. Nam, “Highly efficient high-harmonic generation in an orthogonally polarized two-color laser field,” Phys. Rev. Lett. 94, 243901 (2005).
[CrossRef]

Lewenstein, M.

P. Salières, B. Carré, L. Le Déroff, F. Grasbon, G. G. Paulus, H. Walther, R. Kopold, W. Becker, D. B. Milošević, A. Sanpera, and M. Lewenstein, “Feynman's path-integral approach for intense laser-atom interactions,” Science 292, 902-905 (2001).
[CrossRef] [PubMed]

Lytle, A. L.

X. Zhang, A. L. Lytle, O. Cohen, M. M. Murnane, and H. C. Kapteyn, “Quantum-path control in high-order harmonic generation at high photon energies,” New J. Phys. 10, 025021 (2008).
[CrossRef]

Maquet, A.

R. Taïeb, V. Véniard, J. Wassaf, and A. Maquet, “Roles of resonances and recollisions in strong-field atomic phenomena. II. High-order harmonic generation,” Phys. Rev. A 68, 033403 (2003).
[CrossRef]

Markey, K.

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

McKenna, P.

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

Miloševic, D. B.

D. B. Milošević, E. Hasović, S. Odžak, M. Busuladžić, A. Gazibegović-Busuladžić, and W. Becker, “Wavelength dependence of channel-closing enhancements in high-order above-threshold ionization and harmonic generation,” J. Mod. Opt. 55, 2653-2663 (2008).
[CrossRef]

D. B. Milošević, “High-energy stimulated emission from plasma ablation pumped by resonant high-order harmonic generation,” J. Phys. B 40, 3367-3376 (2007).
[CrossRef]

D. B. Milošević, “Theoretical analysis of high-order harmonic generation from a coherent superposition of states,” J. Opt. Soc. Am. B 23, 308-317 (2006).
[CrossRef]

D. B. Milošević and W. Becker, “Role of long quantum orbits in high-order harmonic generation,” Phys. Rev. A 66, 063417 (2002).
[CrossRef]

P. Salières, B. Carré, L. Le Déroff, F. Grasbon, G. G. Paulus, H. Walther, R. Kopold, W. Becker, D. B. Milošević, A. Sanpera, and M. Lewenstein, “Feynman's path-integral approach for intense laser-atom interactions,” Science 292, 902-905 (2001).
[CrossRef] [PubMed]

Mocek, T.

I. J. Kim, G. H. Lee, S. B. Park, Y. S. Lee, T. K. Kim, C. H. Nam, T. Mocek, and K. Jakubczak, “Generation of submicrojoule high harmonics using a long gas jet in a two-color laser field,” Appl. Phys. Lett. 92, 021125 (2008).
[CrossRef]

Mosnier, J.-P.

D. Kilbane, E. T. Kennedy, J.-P. Mosnier, P. van Kampen, and J. T. Costello, “On the 3p-subshell photoabsorption spectra of iron-group ions: the case of Mn2+,” J. Phys. B 38, L1-L8 (2005).
[CrossRef]

Muller, H. G.

E. S. Toma, P. Antoine, A. de Bohan, and H. G. Muller, “Resonance-enhanced high-harmonic generation,” J. Phys. B 32, 5843-5852 (1999).
[CrossRef]

Mullot, G.

Murnane, M. M.

X. Zhang, A. L. Lytle, O. Cohen, M. M. Murnane, and H. C. Kapteyn, “Quantum-path control in high-order harmonic generation at high photon energies,” New J. Phys. 10, 025021 (2008).
[CrossRef]

Z. Chang, A. Rundquist, H. Wang, I. Christov, H. C. Kapteyn, and M. M. Murnane, “Temporal phase control of soft-x-ray harmonic emission,” Phys. Rev. A 58, R30-R38 (1998).
[CrossRef]

Nagel, S. R.

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

Naik, P. A.

Najmudin, Z.

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

Nam, C. H.

I. J. Kim, G. H. Lee, S. B. Park, Y. S. Lee, T. K. Kim, C. H. Nam, T. Mocek, and K. Jakubczak, “Generation of submicrojoule high harmonics using a long gas jet in a two-color laser field,” Appl. Phys. Lett. 92, 021125 (2008).
[CrossRef]

H. T. Kim, V. Tosa, and C. H. Nam, “Synchronized generation of bright high-order harmonics using self-guided and chirped femtosecond laser pulses,” J. Phys. B 39, S265-S274 (2006).
[CrossRef]

V. Tosa, H. T. Kim, I. J. Kim, and C. H. Nam, “High-order harmonic generation by chirped and self-guided femtosecond laser pulses. II. Time-frequency analysis,” Phys. Rev. A 71, 063808 (2005).
[CrossRef]

I. J. Kim, C. M. Kim, H. T. Kim, G. H. Lee, Y. S. Lee, J. Y. Park, D. J. Cho, and C. H. Nam, “Highly efficient high-harmonic generation in an orthogonally polarized two-color laser field,” Phys. Rev. Lett. 94, 243901 (2005).
[CrossRef]

Neely, D.

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

Norreys, P. A.

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

Obst, B.

A. von dem Borne, R. L. Johnson, B. Sonntag, M. Talkenberg, A. Verweyen, P. Wernet, J. Schulz, K. Tiedtke, Ch. Gerth, B. Obst, P. Zimmermann, and J. E. Hansen, “Suppression of the low-spin multiplet components in the 3p photoelectron spectra of atomic and solid 3d metals,” Phys. Rev. A 62, 052703 (2000).
[CrossRef]

Odžak, S.

D. B. Milošević, E. Hasović, S. Odžak, M. Busuladžić, A. Gazibegović-Busuladžić, and W. Becker, “Wavelength dependence of channel-closing enhancements in high-order above-threshold ionization and harmonic generation,” J. Mod. Opt. 55, 2653-2663 (2008).
[CrossRef]

Ozaki, T.

R. A. Ganeev, L. B. Elouga Bom, J. Abdul-Hadi, M. C. H. Wong, J. P. Brichta, V. R. Bhardwaj, and T. Ozaki, “High-order harmonic generation from fullerene using the plasma harmonic method,” Phys. Rev. Lett. 102, 013903 (2009).
[CrossRef] [PubMed]

R. A. Ganeev, L. B. Elouga Bom, J.-C. Kieffer, and T. Ozaki, “Demonstration of the 101st harmonic generated from laser-produced manganese plasma,” Phys. Rev. A 76, 023831 (2007).
[CrossRef]

R. A. Ganeev, L. B. Elouga Bom, J.-C. Kieffer, and T. Ozaki, “Systematic investigation of resonance-induced single harmonic enhancement in the extreme ultraviolet range,” Phys. Rev. A 75, 063806 (2007).
[CrossRef]

R. A. Ganeev, M. Suzuki, T. Ozaki, M. Baba, and H. Kuroda, “Strong resonance enhancement of a single harmonic generated in extreme ultraviolet range,” Opt. Lett. 31, 1699-1701 (2006).
[CrossRef] [PubMed]

Park, J. Y.

I. J. Kim, C. M. Kim, H. T. Kim, G. H. Lee, Y. S. Lee, J. Y. Park, D. J. Cho, and C. H. Nam, “Highly efficient high-harmonic generation in an orthogonally polarized two-color laser field,” Phys. Rev. Lett. 94, 243901 (2005).
[CrossRef]

Park, S. B.

I. J. Kim, G. H. Lee, S. B. Park, Y. S. Lee, T. K. Kim, C. H. Nam, T. Mocek, and K. Jakubczak, “Generation of submicrojoule high harmonics using a long gas jet in a two-color laser field,” Appl. Phys. Lett. 92, 021125 (2008).
[CrossRef]

Paulus, G. G.

P. Salières, B. Carré, L. Le Déroff, F. Grasbon, G. G. Paulus, H. Walther, R. Kopold, W. Becker, D. B. Milošević, A. Sanpera, and M. Lewenstein, “Feynman's path-integral approach for intense laser-atom interactions,” Science 292, 902-905 (2001).
[CrossRef] [PubMed]

Praeger, M.

Puell, H.

H. Puell and C. R. Vidal, “Nonlinear polarizations and excitations and their time dependence in discrete multilevel systems,” Phys. Rev. A 14, 2225-2239 (1976).
[CrossRef]

Raghuramaiah, M.

R. A. Ganeev, H. Singhal, P. A. Naik, V. Arora, U. Chakravarty, J. A. Chakera, R. A. Khan, I. A. Kulagin, P. V. Redkin, M. Raghuramaiah, and P. D. Gupta, “Harmonic generation from indium-rich plasmas,” Phys. Rev. A 74, 063824 (2006).
[CrossRef]

R. A. Ganeev, H. Singhal, P. A. Naik, V. Arora, U. Chakravarty, J. A. Chakera, R. A. Khan, P. V. Redkin, M. Raghuramaiah, and P. D. Gupta, “Single harmonic enhancement by controlling the chirp of the driving laser pulse during high-order harmonic generation from GaAs plasma,” J. Opt. Soc. Am. B 23, 2535-2540 (2006).
[CrossRef]

Ramanathan, V.

Redkin, P. V.

R. A. Ganeev, H. Singhal, P. A. Naik, V. Arora, U. Chakravarty, J. A. Chakera, R. A. Khan, P. V. Redkin, M. Raghuramaiah, and P. D. Gupta, “Single harmonic enhancement by controlling the chirp of the driving laser pulse during high-order harmonic generation from GaAs plasma,” J. Opt. Soc. Am. B 23, 2535-2540 (2006).
[CrossRef]

R. A. Ganeev, H. Singhal, P. A. Naik, V. Arora, U. Chakravarty, J. A. Chakera, R. A. Khan, I. A. Kulagin, P. V. Redkin, M. Raghuramaiah, and P. D. Gupta, “Harmonic generation from indium-rich plasmas,” Phys. Rev. A 74, 063824 (2006).
[CrossRef]

Reitze, D. H.

Rogers, E. T. F.

Rundquist, A.

Z. Chang, A. Rundquist, H. Wang, I. Christov, H. C. Kapteyn, and M. M. Murnane, “Temporal phase control of soft-x-ray harmonic emission,” Phys. Rev. A 58, R30-R38 (1998).
[CrossRef]

Salières, P.

P. Salières, B. Carré, L. Le Déroff, F. Grasbon, G. G. Paulus, H. Walther, R. Kopold, W. Becker, D. B. Milošević, A. Sanpera, and M. Lewenstein, “Feynman's path-integral approach for intense laser-atom interactions,” Science 292, 902-905 (2001).
[CrossRef] [PubMed]

Sanpera, A.

P. Salières, B. Carré, L. Le Déroff, F. Grasbon, G. G. Paulus, H. Walther, R. Kopold, W. Becker, D. B. Milošević, A. Sanpera, and M. Lewenstein, “Feynman's path-integral approach for intense laser-atom interactions,” Science 292, 902-905 (2001).
[CrossRef] [PubMed]

Schulz, J.

A. von dem Borne, R. L. Johnson, B. Sonntag, M. Talkenberg, A. Verweyen, P. Wernet, J. Schulz, K. Tiedtke, Ch. Gerth, B. Obst, P. Zimmermann, and J. E. Hansen, “Suppression of the low-spin multiplet components in the 3p photoelectron spectra of atomic and solid 3d metals,” Phys. Rev. A 62, 052703 (2000).
[CrossRef]

Shan, B.

B. Shan, A. Cavalieri, and Z. Chang, “Tunable high harmonic generation with an optical parametric amplifier,” Appl. Phys. B: Photophys. Laser Chem. 74, S23-S26 (2002).
[CrossRef]

Simpson, P. T.

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

Singhal, H.

Sonntag, B.

A. von dem Borne, R. L. Johnson, B. Sonntag, M. Talkenberg, A. Verweyen, P. Wernet, J. Schulz, K. Tiedtke, Ch. Gerth, B. Obst, P. Zimmermann, and J. E. Hansen, “Suppression of the low-spin multiplet components in the 3p photoelectron spectra of atomic and solid 3d metals,” Phys. Rev. A 62, 052703 (2000).
[CrossRef]

Spielmann, C.

C. Winterfeldt, C. Spielmann, and G. Gerber, “Colloquium: optimal control of high-harmonic generation,” Rev. Mod. Phys. 80, 117-141 (2008).
[CrossRef]

Suzuki, M.

Taïeb, R.

R. Taïeb, V. Véniard, J. Wassaf, and A. Maquet, “Roles of resonances and recollisions in strong-field atomic phenomena. II. High-order harmonic generation,” Phys. Rev. A 68, 033403 (2003).
[CrossRef]

Talkenberg, M.

A. von dem Borne, R. L. Johnson, B. Sonntag, M. Talkenberg, A. Verweyen, P. Wernet, J. Schulz, K. Tiedtke, Ch. Gerth, B. Obst, P. Zimmermann, and J. E. Hansen, “Suppression of the low-spin multiplet components in the 3p photoelectron spectra of atomic and solid 3d metals,” Phys. Rev. A 62, 052703 (2000).
[CrossRef]

Tang, X.

H. Xu, X. Tang, and P. Lambropoulos, “Nonperturbative theory of harmonic generation in helium under a high-intensity laser field: the role of intermediate resonance and of the ion,” Phys. Rev. A 46, R2225-R2228 (1992).
[CrossRef] [PubMed]

Tiedtke, K.

A. von dem Borne, R. L. Johnson, B. Sonntag, M. Talkenberg, A. Verweyen, P. Wernet, J. Schulz, K. Tiedtke, Ch. Gerth, B. Obst, P. Zimmermann, and J. E. Hansen, “Suppression of the low-spin multiplet components in the 3p photoelectron spectra of atomic and solid 3d metals,” Phys. Rev. A 62, 052703 (2000).
[CrossRef]

Toma, E. S.

E. S. Toma, P. Antoine, A. de Bohan, and H. G. Muller, “Resonance-enhanced high-harmonic generation,” J. Phys. B 32, 5843-5852 (1999).
[CrossRef]

Tosa, V.

H. T. Kim, V. Tosa, and C. H. Nam, “Synchronized generation of bright high-order harmonics using self-guided and chirped femtosecond laser pulses,” J. Phys. B 39, S265-S274 (2006).
[CrossRef]

V. Tosa, H. T. Kim, I. J. Kim, and C. H. Nam, “High-order harmonic generation by chirped and self-guided femtosecond laser pulses. II. Time-frequency analysis,” Phys. Rev. A 71, 063808 (2005).
[CrossRef]

van Kampen, P.

D. Kilbane, E. T. Kennedy, J.-P. Mosnier, P. van Kampen, and J. T. Costello, “On the 3p-subshell photoabsorption spectra of iron-group ions: the case of Mn2+,” J. Phys. B 38, L1-L8 (2005).
[CrossRef]

Véniard, V.

R. Taïeb, V. Véniard, J. Wassaf, and A. Maquet, “Roles of resonances and recollisions in strong-field atomic phenomena. II. High-order harmonic generation,” Phys. Rev. A 68, 033403 (2003).
[CrossRef]

Verweyen, A.

A. von dem Borne, R. L. Johnson, B. Sonntag, M. Talkenberg, A. Verweyen, P. Wernet, J. Schulz, K. Tiedtke, Ch. Gerth, B. Obst, P. Zimmermann, and J. E. Hansen, “Suppression of the low-spin multiplet components in the 3p photoelectron spectra of atomic and solid 3d metals,” Phys. Rev. A 62, 052703 (2000).
[CrossRef]

Vidal, C. R.

H. Puell and C. R. Vidal, “Nonlinear polarizations and excitations and their time dependence in discrete multilevel systems,” Phys. Rev. A 14, 2225-2239 (1976).
[CrossRef]

von dem Borne, A.

A. von dem Borne, R. L. Johnson, B. Sonntag, M. Talkenberg, A. Verweyen, P. Wernet, J. Schulz, K. Tiedtke, Ch. Gerth, B. Obst, P. Zimmermann, and J. E. Hansen, “Suppression of the low-spin multiplet components in the 3p photoelectron spectra of atomic and solid 3d metals,” Phys. Rev. A 62, 052703 (2000).
[CrossRef]

Walther, H.

P. Salières, B. Carré, L. Le Déroff, F. Grasbon, G. G. Paulus, H. Walther, R. Kopold, W. Becker, D. B. Milošević, A. Sanpera, and M. Lewenstein, “Feynman's path-integral approach for intense laser-atom interactions,” Science 292, 902-905 (2001).
[CrossRef] [PubMed]

Wang, H.

Z. Chang, A. Rundquist, H. Wang, I. Christov, H. C. Kapteyn, and M. M. Murnane, “Temporal phase control of soft-x-ray harmonic emission,” Phys. Rev. A 58, R30-R38 (1998).
[CrossRef]

Wassaf, J.

R. Taïeb, V. Véniard, J. Wassaf, and A. Maquet, “Roles of resonances and recollisions in strong-field atomic phenomena. II. High-order harmonic generation,” Phys. Rev. A 68, 033403 (2003).
[CrossRef]

Weihe, F.

Wernet, P.

A. von dem Borne, R. L. Johnson, B. Sonntag, M. Talkenberg, A. Verweyen, P. Wernet, J. Schulz, K. Tiedtke, Ch. Gerth, B. Obst, P. Zimmermann, and J. E. Hansen, “Suppression of the low-spin multiplet components in the 3p photoelectron spectra of atomic and solid 3d metals,” Phys. Rev. A 62, 052703 (2000).
[CrossRef]

West, J. B.

J. B. West, J. E. Hansen, B. Kristensen, F. Folkmann, and H. Kjeldsen, “Revised interpretation of the photoionization of Cr+ in the 3p excitation region,” J. Phys. B 36, L327-L334 (2003).
[CrossRef]

Willingale, L.

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

Winterfeldt, C.

C. Winterfeldt, C. Spielmann, and G. Gerber, “Colloquium: optimal control of high-harmonic generation,” Rev. Mod. Phys. 80, 117-141 (2008).
[CrossRef]

Wong, M. C. H.

R. A. Ganeev, L. B. Elouga Bom, J. Abdul-Hadi, M. C. H. Wong, J. P. Brichta, V. R. Bhardwaj, and T. Ozaki, “High-order harmonic generation from fullerene using the plasma harmonic method,” Phys. Rev. Lett. 102, 013903 (2009).
[CrossRef] [PubMed]

Xu, H.

H. Xu, X. Tang, and P. Lambropoulos, “Nonperturbative theory of harmonic generation in helium under a high-intensity laser field: the role of intermediate resonance and of the ion,” Phys. Rev. A 46, R2225-R2228 (1992).
[CrossRef] [PubMed]

Zepf, M.

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

Zhang, X.

X. Zhang, A. L. Lytle, O. Cohen, M. M. Murnane, and H. C. Kapteyn, “Quantum-path control in high-order harmonic generation at high photon energies,” New J. Phys. 10, 025021 (2008).
[CrossRef]

Zimmermann, P.

A. von dem Borne, R. L. Johnson, B. Sonntag, M. Talkenberg, A. Verweyen, P. Wernet, J. Schulz, K. Tiedtke, Ch. Gerth, B. Obst, P. Zimmermann, and J. E. Hansen, “Suppression of the low-spin multiplet components in the 3p photoelectron spectra of atomic and solid 3d metals,” Phys. Rev. A 62, 052703 (2000).
[CrossRef]

Appl. Phys. B: Photophys. Laser Chem. (1)

B. Shan, A. Cavalieri, and Z. Chang, “Tunable high harmonic generation with an optical parametric amplifier,” Appl. Phys. B: Photophys. Laser Chem. 74, S23-S26 (2002).
[CrossRef]

Appl. Phys. Lett. (1)

I. J. Kim, G. H. Lee, S. B. Park, Y. S. Lee, T. K. Kim, C. H. Nam, T. Mocek, and K. Jakubczak, “Generation of submicrojoule high harmonics using a long gas jet in a two-color laser field,” Appl. Phys. Lett. 92, 021125 (2008).
[CrossRef]

J. Appl. Phys. (1)

R. A. Ganeev, M. Suzuki, M. Baba, M. Ichihara, and H. Kuroda, “Low- and high-order nonlinear optical properties of Au, Pt, Pd, and Ru nanoparticles,” J. Appl. Phys. 103, 063102 (2008).
[CrossRef]

J. Mod. Opt. (1)

D. B. Milošević, E. Hasović, S. Odžak, M. Busuladžić, A. Gazibegović-Busuladžić, and W. Becker, “Wavelength dependence of channel-closing enhancements in high-order above-threshold ionization and harmonic generation,” J. Mod. Opt. 55, 2653-2663 (2008).
[CrossRef]

J. Opt. Soc. Am. B (5)

J. Phys. B (7)

H. T. Kim, V. Tosa, and C. H. Nam, “Synchronized generation of bright high-order harmonics using self-guided and chirped femtosecond laser pulses,” J. Phys. B 39, S265-S274 (2006).
[CrossRef]

R. A. Ganeev, “High-order harmonic generation in laser plasma: a review of recent achievements,” J. Phys. B 40, R213-R253 (2007).
[CrossRef]

R. A. Ganeev, M. Suzuki, M. Baba, M. Ichihara, and H. Kuroda, “High-order harmonic generation in Ag nanoparticle-contained plasma,” J. Phys. B 41, 045603 (2008).
[CrossRef]

J. B. West, J. E. Hansen, B. Kristensen, F. Folkmann, and H. Kjeldsen, “Revised interpretation of the photoionization of Cr+ in the 3p excitation region,” J. Phys. B 36, L327-L334 (2003).
[CrossRef]

D. B. Milošević, “High-energy stimulated emission from plasma ablation pumped by resonant high-order harmonic generation,” J. Phys. B 40, 3367-3376 (2007).
[CrossRef]

D. Kilbane, E. T. Kennedy, J.-P. Mosnier, P. van Kampen, and J. T. Costello, “On the 3p-subshell photoabsorption spectra of iron-group ions: the case of Mn2+,” J. Phys. B 38, L1-L8 (2005).
[CrossRef]

E. S. Toma, P. Antoine, A. de Bohan, and H. G. Muller, “Resonance-enhanced high-harmonic generation,” J. Phys. B 32, 5843-5852 (1999).
[CrossRef]

Nat. Phys. (1)

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

New J. Phys. (1)

X. Zhang, A. L. Lytle, O. Cohen, M. M. Murnane, and H. C. Kapteyn, “Quantum-path control in high-order harmonic generation at high photon energies,” New J. Phys. 10, 025021 (2008).
[CrossRef]

Opt. Lett. (4)

Phys. Rev. A (11)

Z. Chang, A. Rundquist, H. Wang, I. Christov, H. C. Kapteyn, and M. M. Murnane, “Temporal phase control of soft-x-ray harmonic emission,” Phys. Rev. A 58, R30-R38 (1998).
[CrossRef]

R. A. Ganeev, L. B. Elouga Bom, J.-C. Kieffer, and T. Ozaki, “Systematic investigation of resonance-induced single harmonic enhancement in the extreme ultraviolet range,” Phys. Rev. A 75, 063806 (2007).
[CrossRef]

V. Tosa, H. T. Kim, I. J. Kim, and C. H. Nam, “High-order harmonic generation by chirped and self-guided femtosecond laser pulses. II. Time-frequency analysis,” Phys. Rev. A 71, 063808 (2005).
[CrossRef]

R. A. Ganeev, H. Singhal, P. A. Naik, V. Arora, U. Chakravarty, J. A. Chakera, R. A. Khan, I. A. Kulagin, P. V. Redkin, M. Raghuramaiah, and P. D. Gupta, “Harmonic generation from indium-rich plasmas,” Phys. Rev. A 74, 063824 (2006).
[CrossRef]

R. A. Ganeev, L. B. Elouga Bom, J.-C. Kieffer, and T. Ozaki, “Demonstration of the 101st harmonic generated from laser-produced manganese plasma,” Phys. Rev. A 76, 023831 (2007).
[CrossRef]

R. Taïeb, V. Véniard, J. Wassaf, and A. Maquet, “Roles of resonances and recollisions in strong-field atomic phenomena. II. High-order harmonic generation,” Phys. Rev. A 68, 033403 (2003).
[CrossRef]

D. B. Milošević and W. Becker, “Role of long quantum orbits in high-order harmonic generation,” Phys. Rev. A 66, 063417 (2002).
[CrossRef]

H. Puell and C. R. Vidal, “Nonlinear polarizations and excitations and their time dependence in discrete multilevel systems,” Phys. Rev. A 14, 2225-2239 (1976).
[CrossRef]

J.-C. Diels and A. T. Georges, “Coherent two-photon resonant third- and fifth-harmonic vacuum-ultraviolet generation in metal vapors,” Phys. Rev. A 19, 1589-1606 (1979).
[CrossRef]

A. von dem Borne, R. L. Johnson, B. Sonntag, M. Talkenberg, A. Verweyen, P. Wernet, J. Schulz, K. Tiedtke, Ch. Gerth, B. Obst, P. Zimmermann, and J. E. Hansen, “Suppression of the low-spin multiplet components in the 3p photoelectron spectra of atomic and solid 3d metals,” Phys. Rev. A 62, 052703 (2000).
[CrossRef]

H. Xu, X. Tang, and P. Lambropoulos, “Nonperturbative theory of harmonic generation in helium under a high-intensity laser field: the role of intermediate resonance and of the ion,” Phys. Rev. A 46, R2225-R2228 (1992).
[CrossRef] [PubMed]

Phys. Rev. Lett. (3)

R. A. Ganeev, L. B. Elouga Bom, J. Abdul-Hadi, M. C. H. Wong, J. P. Brichta, V. R. Bhardwaj, and T. Ozaki, “High-order harmonic generation from fullerene using the plasma harmonic method,” Phys. Rev. Lett. 102, 013903 (2009).
[CrossRef] [PubMed]

I. J. Kim, C. M. Kim, H. T. Kim, G. H. Lee, Y. S. Lee, J. Y. Park, D. J. Cho, and C. H. Nam, “Highly efficient high-harmonic generation in an orthogonally polarized two-color laser field,” Phys. Rev. Lett. 94, 243901 (2005).
[CrossRef]

B. Dromey, S. Kar, C. Bellei, D. C. Carroll, R. J. Clarke, J. S. Green, S. Kneip, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, and M. Zepf, “Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces,” Phys. Rev. Lett. 99, 085001 (2007).
[CrossRef] [PubMed]

Rev. Mod. Phys. (1)

C. Winterfeldt, C. Spielmann, and G. Gerber, “Colloquium: optimal control of high-harmonic generation,” Rev. Mod. Phys. 80, 117-141 (2008).
[CrossRef]

Science (1)

P. Salières, B. Carré, L. Le Déroff, F. Grasbon, G. G. Paulus, H. Walther, R. Kopold, W. Becker, D. B. Milošević, A. Sanpera, and M. Lewenstein, “Feynman's path-integral approach for intense laser-atom interactions,” Science 292, 902-905 (2001).
[CrossRef] [PubMed]

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Figures (9)

Fig. 1
Fig. 1

Harmonic spectra generated in In plasma at (a) circular and (b)–(d) linear polarization of fundamental radiation and different chirps and durations of laser pulse. (a), (b) Chirp-free 120 fs pulses ( I pp = 1 × 10 10 W cm 2 , I mp = 1 × 10 15 W cm 2 , Δ t = 60 ns ); (c) negatively chirped 175 fs pulses ( I mp = 7 × 10 14 W cm 2 ) ; (d) negatively chirped 220 fs pulses ( I mp = 5 × 10 14 W cm 2 ) . The numbers on the curves indicate the harmonic orders. Inset, experimental setup for the HHG studies in laser plumes. MP, main pulse; PP, prepulse; DL, delay line; C, grating compressor; FL, focusing lenses; T, target; XUVS, XUV spectrometer; G, gold-coated grating; MCP, microchannel plate; CCD, charge-coupled device.

Fig. 2
Fig. 2

Harmonic spectra observed in the case of La plasma using (a) chirp-free 120 fs pulses ( I pp = 2 × 10 10 W cm 2 , I mp = 9 × 10 14 W cm 2 , Δ t = 50 ns ); (b) positively chirped 190 fs pulses ( I mp = 5 × 10 10 W cm 2 ) ; and (c) negatively chirped 170 fs pulses ( I mp = 6 × 10 14 W cm 2 ) . Inset, plasma spectrum of La plume at enhanced prepulse intensity.

Fig. 3
Fig. 3

Harmonic spectra obtained from Mn plasma.

Fig. 4
Fig. 4

Spectra of harmonics from silver plasma generated using unmodulated laser pulse (thin curve) and PM (thick curve) laser pulse. Inset shows the spectra of (1) input pulse and (2) PM pulse.

Fig. 5
Fig. 5

Effect of chirp on the harmonics generated in Ag plasma using the PM pulses. Thick and thin curves show the harmonic spectra from the PM pulse generated using chirp-free and negatively chirped laser pulses, respectively. Inset shows the expanded view of 17th harmonic spectrum for negatively chirped and chirp-free pulses.

Fig. 6
Fig. 6

Effect of PM on the HHG from C 60 plasma generated using (a) phase-modulated laser pulses and (b) unmodulated laser pulses. In former case the harmonics are shifted toward red.

Fig. 7
Fig. 7

Spectrally broadened harmonics (a) from the soot mixed with 2% C 60 and (b) from the C 60 plasma. Harmonic broadening is achieved through SPM inside the plasma plume at I mp > 4 × 10 15 W cm 2 . The bandwidth of 11th harmonic is increased from 1 nm [at lower intensities, Fig. 6b] to 3.6 nm .

Fig. 8
Fig. 8

HHG from silver nanoparticles (a) mixed with soft glue and dried in vacuum to make foam-like structure; (b) mixed with superglue and dried; (c) dissolved in PVA and dried on the glass substrate.

Fig. 9
Fig. 9

Harmonic spectrum obtained from Ag nanoparticle plasma using the two-color field.

Equations (1)

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ω = ω 0 k 0 z n 2 d I d t ,

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