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By solving the time-dependent Schrödinger equation under velocity gauge with split-operator method, we studied the high harmonics of one-dimensional helium atom exposed to one-color laser field and two-color fields composed of IR field and UV field. And the relationship between conversion efficiency of high-order harmonic generation near the cut-off position and wavelength of the laser (800—2000 nm) was also analyzed. It was found that high-order harmonic conversion efficiency driven by two-color laser field near the cut-off position changes with wavelength as η(λ)∝λ-x,where the x value depends on the intensity of laser field, and the appropriate selection of intensity of combined laser field can improve high harmonic conversion efficiency near the cut-off position.
[1] Brabec T, Krausz F 2000 Rev. Mod. Phys. 72 545
[2] Corkum P 2000 Nature 403 845
[3] Ferenc Krausz , Misha Ivanov 2009 Rev. Mod. Phys. 81 163
[4] Antoine P , L’Huillier A , Lewenstein M 1996 Phys. Rev. Lett. 77 1234
[5] Zou P, Li R X, Zeng Z N, Xiong H, Liu P, Leng Y X, Fan P Z, Xu Z Z 2010 Chin.Phys. B 19 019501
[6] Ye X L, Zhou X X, Zhao S F, Li P C 2009 Acta Phys. Sin. 58 1579 (in Chinese)[叶小亮、 周效信、 赵松峰、 李鹏程 2009 物理学报 58 1579]
[7] Zeng Z N, Li R X, Xie X H, Xu Z Z 2004 Acta Phys. Sin. 53 2316 (in Chinese)[曾志男、 李儒新、 谢新华、 徐至展 2004 物理学报 53 2316]
[8] Hong W Y, Yang Z Y, Lan P F, Zhang Q B, Li Q G, Lu P X 2009 Acta Phys. Sin. 58 4914(in Chinese)[洪伟毅、 杨振宇、 兰鹏飞、 张庆斌、 李钱光、 陆培祥 2009 物理学报 58 4914]
[9] Zheng J, Sheng Z M, Zhang J 2005 Acta Phys. Sin. 54 2638 (in Chinese)[郑 君、 盛政明、 张 杰 2005 物理学报 54 2638]
[10] Paul P M, Toma E S, Breger P 2001 Science 292 1689
[11] Hentschel M, Kienberger R 2001 Nature 414 509
[12] Corkum P B 1993 Phys. Rev. Lett. 71 1994
[13] Li P C, Zhou X X, Wang G L, Zhao Z X 2009 Phys. Rev. A 80 053825
[14] Tate J, Auguste T, Muller H G, Salières P, Agostini P,DiMauro L F 2007 Phys. Rev. Lett. 98 013901
[15] Schiessl K, Ishikawa K L, Persson E, Burgdörfer J 2007 Phys. Rev. Lett. 99 253903
[16] Frolov M V, Manakov N L, Starace A F 2008 Phys. Rev. Lett. 100 173001
[17] Chen J, Zeng B, Liu X, Cheng Y , Xu Z Z 2009 New Journal of Physics 11 113021
[18] Cheng C Z, Zhou X X, Li P C 2011 Acta Phys. Sin. 60 033203 (in Chinese) [成春芝、 周效信、 李鹏程 2011 物理学报 60 033203]
[19] Li P C, Zhou X X, Dong C Z, Zhao S F 2004 Acta Phys. Sin. 53 750 (in Chinese)[李鹏程、 周效信、 董晨钟、 赵松峰 2004 物理学报 53 750]
[20] Zhang C L, Qi Y Y, Liu X S, Ding P Z 2009 Acta Phys. Sin. 56 774 (in Chinese) [张春丽、 祁月盈、 刘学深、 丁培柱 2007 物理学报 56 774]
[21] Falco-Filho E L, Gkortsas V M, Gordon A, Körtner F X 2009 Optics Express 17 11217
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[1] Brabec T, Krausz F 2000 Rev. Mod. Phys. 72 545
[2] Corkum P 2000 Nature 403 845
[3] Ferenc Krausz , Misha Ivanov 2009 Rev. Mod. Phys. 81 163
[4] Antoine P , L’Huillier A , Lewenstein M 1996 Phys. Rev. Lett. 77 1234
[5] Zou P, Li R X, Zeng Z N, Xiong H, Liu P, Leng Y X, Fan P Z, Xu Z Z 2010 Chin.Phys. B 19 019501
[6] Ye X L, Zhou X X, Zhao S F, Li P C 2009 Acta Phys. Sin. 58 1579 (in Chinese)[叶小亮、 周效信、 赵松峰、 李鹏程 2009 物理学报 58 1579]
[7] Zeng Z N, Li R X, Xie X H, Xu Z Z 2004 Acta Phys. Sin. 53 2316 (in Chinese)[曾志男、 李儒新、 谢新华、 徐至展 2004 物理学报 53 2316]
[8] Hong W Y, Yang Z Y, Lan P F, Zhang Q B, Li Q G, Lu P X 2009 Acta Phys. Sin. 58 4914(in Chinese)[洪伟毅、 杨振宇、 兰鹏飞、 张庆斌、 李钱光、 陆培祥 2009 物理学报 58 4914]
[9] Zheng J, Sheng Z M, Zhang J 2005 Acta Phys. Sin. 54 2638 (in Chinese)[郑 君、 盛政明、 张 杰 2005 物理学报 54 2638]
[10] Paul P M, Toma E S, Breger P 2001 Science 292 1689
[11] Hentschel M, Kienberger R 2001 Nature 414 509
[12] Corkum P B 1993 Phys. Rev. Lett. 71 1994
[13] Li P C, Zhou X X, Wang G L, Zhao Z X 2009 Phys. Rev. A 80 053825
[14] Tate J, Auguste T, Muller H G, Salières P, Agostini P,DiMauro L F 2007 Phys. Rev. Lett. 98 013901
[15] Schiessl K, Ishikawa K L, Persson E, Burgdörfer J 2007 Phys. Rev. Lett. 99 253903
[16] Frolov M V, Manakov N L, Starace A F 2008 Phys. Rev. Lett. 100 173001
[17] Chen J, Zeng B, Liu X, Cheng Y , Xu Z Z 2009 New Journal of Physics 11 113021
[18] Cheng C Z, Zhou X X, Li P C 2011 Acta Phys. Sin. 60 033203 (in Chinese) [成春芝、 周效信、 李鹏程 2011 物理学报 60 033203]
[19] Li P C, Zhou X X, Dong C Z, Zhao S F 2004 Acta Phys. Sin. 53 750 (in Chinese)[李鹏程、 周效信、 董晨钟、 赵松峰 2004 物理学报 53 750]
[20] Zhang C L, Qi Y Y, Liu X S, Ding P Z 2009 Acta Phys. Sin. 56 774 (in Chinese) [张春丽、 祁月盈、 刘学深、 丁培柱 2007 物理学报 56 774]
[21] Falco-Filho E L, Gkortsas V M, Gordon A, Körtner F X 2009 Optics Express 17 11217
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