项目名称: 红外周期量级超强激光场中分子产生高次谐波研究
项目编号: No.11274326
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 数理科学和化学
项目作者: 刘鹏
作者单位: 中国科学院上海光学精密机械研究所
项目金额: 78万元
中文摘要: 基于超快强激光场中取向分子产生高次谐波的分子轨道层析成像技术,可以以前所未有的空间分辨率研究分子结构和动力学,成为研究热点领域,但受到多电子效应和干涉效应等影响,尚处于研究发展阶段。本项目拟利用新型红外周期量级强激光场的长波长、少周期特点,研究超短强激光场作用下分子产生高次谐波的微观特性和新机理,探索分子轨道结构和高次谐波的本质联系,揭示分子在超强超短激光场作用下的微观结构动力学,为发展和突破分子轨道成像技术提供新思路。
中文关键词: 高次谐波;周期量级脉冲;红外强激光场;分子轨道;相干控制
英文摘要: Tomographic imaging of molecular orbitals can probe the molecular structure and dynamics in unprecedented high spatial and temporal resolutions, but its application is limited mainly by the complicated multi-electron effect and two-center interference in high harmonic generation (HHG) from aligned molecules in ultra-short intense laser fields. This proposal aims to understand the microscopic mechanisms of HHG in intense infrared few-cycle laser fields. The longer wavelength and shorter temporal duration enable the investigations of HHG from aligned molecules to reveal the intrinsic relation between the HHG spectra and molecular electronic structures. The finding is expected to improve the accuracy of tomographic imaging technique for molecular orbitals.
英文关键词: High harmonic generation;Few-cycle pulses;Infrared intense laser field;Molecular orbital;Coherent control