华中科技大学学报（自然科学版）2025，Vol.53Issue(9)：40-45,6.DOI:10.13245/j.hust.250621
双色交叉线偏振激光场驱动氧分子产生近圆偏振孤立阿秒脉冲
Generation of near-circularly polarized isolated attosecond pulses from O2 molecules driven by two-color cross-linearly-polarized laser fields
摘要
Abstract
The polarization properties of high-order harmonics from the perfectly aligned O2 molecule in few-cycle two-color cross-linearly-polarized laser fields were theoretically studied by solving the two-dimensional time-dependent Schrödinger equation(2D-TDSE),and the possibility for generating near-circularly polarized isolated attosecond pulses(CP-IAPs)was demonstrated.Furthermore,the ellipticity of the generated IAPs can be tuned by adjusting the alignment angle of the O2 molecule,the relative phase and the crossing angle of two linearly-polarized laser fields.It can be show that CP-IAPs with the shortest one achieves 272 as can be obtained by superposing supercontinuum high harmonics near the cutoff at the proper molecular alignment angles,relative phases and crossing angles of lasers.关键词
取向的氧分子/二维含时薛定谔方程/双色交叉线偏振激光场/超连续高次谐波/近圆偏振孤立阿秒脉冲Key words
aligned O2 molecules/two-dimensional time-dependent Schrödinger equation/two-color cross-linearly-polarized laser fields/supercontinuum high-order harmonics/near-circularly polarized isolated attosecond pulses分类
数理科学引用本文复制引用
龚雪,王国利,赵松峰,周效信..双色交叉线偏振激光场驱动氧分子产生近圆偏振孤立阿秒脉冲[J].华中科技大学学报（自然科学版）,2025,53(9):40-45,6.基金项目
国家自然科学基金资助项目(12164044,12364040). （12164044,12364040）
