物理学报2011，Vol.60Issue(5)：366-371,6.
原子在双色组合场中产生高次谐波的转换效率与激光波长的关系
The relationship between conversion efficiency of high-order harmonic generation from atom and wavelength in two-color combined fields
摘要
Abstract
By solving the time-dependent Schr(o)dinger 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.关键词
双色组合场/分裂算符/高次谐波/转换效率Key words
two-color combined fields/ split-operator/ high-order harmonic/ conversion efficiency引用本文复制引用
曹卫军,成春芝,周效信..原子在双色组合场中产生高次谐波的转换效率与激光波长的关系[J].物理学报,2011,60(5):366-371,6.基金项目
国家自然科学基金(批准号:11044007,11064013),高等学校博士学科点专项科研基金(批准号:20096203110001),西北师范大学创新项目(批准号:NWNU-KJCXGC-03-62)资助的课题. （批准号:11044007,11064013）
