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We theoretically investigate the effects of additional pulse wavelength at different frequencies on attosecond pulse generation from the hydrogen atom exposed to multicycle two-color laser field, by numerically solving the one-dimensional time-dependent Schrödinger equation. The results show that when the wavelength of the additional pulse is set to be 1600 nm, the cutoff position of the harmonic spectra is extended dramatically compared with the scenario in the case of 533 nm pulse in visible waveband, accordingly the bandwidth of supercontinuum is widened, finally 78 attosecond pulse is obtained by wavelet transform. In this paper, we explain the effects of additional pulse wavelength in different wavebands on high order harmonic generation for the first time according to the optical oscillation frequency of the synthesized field. Also, such a result is conducible to choosing the appropriate additional pulse frequency in order to obtain the isolated attosecond pulse.
[1] He R 2006 M. S. Thesis (Changsha: National University of Defense Technology) (in Chinese) [何荣 2006 硕士学位论文(长沙:国防科技大学)]
[2] Bartels R A, Paul A, Green H, Kapteyn H C, Mumane M M, Backus S, Christov I P, Liu Y, Attwood D, Jacobsen C 2002 Science 297 376
[3] Goulielmakis E, Schultze M, Hofstetter M, Yakovlev V S, Gagnon J, Uiberacker M, Aquila A L, Gullikson E M, Attwood D T, Kienberger R, Krausz F, Kleineberg U 2008 Science 320 1614
[4] Sansone G, Benedetti E, Calegari F, Vozzi C, Avaldi L, Flammini R, Poletto L, Villoresi P, Altucci C, Velotta R, Stagira S, Silvestri S D, Nisoli M 2006 Science 314 443
[5] Pfeifer T, Gallmann L, Abel M J, Neumark D M, Leon S R 2006 Opt. Lett. 975 977
[6] Lan P F, Takahashi E J, Midorikawa K 2010 Phys. Rev. A 82 053413
[7] Liu S, Chen G, Chen J G, Zhu Q R 2009 Acta Phys. Sin. 58 1574 (in Chinese) [刘硕, 陈高, 陈基根, 朱颀人 2009 58 1574]
[8] Eberly J H, Su Q, Javanainen J 1989 Phys. Rev. Lett. 62 881
[9] Bellini M, Corsi C, Gambino M C 2001 Phys. Rev. A 64 023411
[10] Balcou P, L' Huillier A, Escande D 1996 Phys. Rev. A 53 3456
[11] Corkum P B 1993 Phys. Rev. Lett. 71 1994
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[1] He R 2006 M. S. Thesis (Changsha: National University of Defense Technology) (in Chinese) [何荣 2006 硕士学位论文(长沙:国防科技大学)]
[2] Bartels R A, Paul A, Green H, Kapteyn H C, Mumane M M, Backus S, Christov I P, Liu Y, Attwood D, Jacobsen C 2002 Science 297 376
[3] Goulielmakis E, Schultze M, Hofstetter M, Yakovlev V S, Gagnon J, Uiberacker M, Aquila A L, Gullikson E M, Attwood D T, Kienberger R, Krausz F, Kleineberg U 2008 Science 320 1614
[4] Sansone G, Benedetti E, Calegari F, Vozzi C, Avaldi L, Flammini R, Poletto L, Villoresi P, Altucci C, Velotta R, Stagira S, Silvestri S D, Nisoli M 2006 Science 314 443
[5] Pfeifer T, Gallmann L, Abel M J, Neumark D M, Leon S R 2006 Opt. Lett. 975 977
[6] Lan P F, Takahashi E J, Midorikawa K 2010 Phys. Rev. A 82 053413
[7] Liu S, Chen G, Chen J G, Zhu Q R 2009 Acta Phys. Sin. 58 1574 (in Chinese) [刘硕, 陈高, 陈基根, 朱颀人 2009 58 1574]
[8] Eberly J H, Su Q, Javanainen J 1989 Phys. Rev. Lett. 62 881
[9] Bellini M, Corsi C, Gambino M C 2001 Phys. Rev. A 64 023411
[10] Balcou P, L' Huillier A, Escande D 1996 Phys. Rev. A 53 3456
[11] Corkum P B 1993 Phys. Rev. Lett. 71 1994
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