强激光场中高次谐波标度律的数值验证  

Numerical verification on the scaling law of high-order harmonic generation in the intense laser field

作　　者：叶会亮 王海跃 刘志勇[1] 苏未安[1] YE Huiliang;WANG Haiyue;LIU Zhiyong;SU Wei＇an(School of Science,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学理学院,江西赣州341000

出　　处：《江西理工大学学报》2018年第5期103-106,共4页Journal of Jiangxi University of Science and Technology

基　　金：国家自然科学基金资助项目(11647149;11464016);江西省教育厅科学技术研究项目(GJJ160659);江西理工大学科研基金项目(NSFJ2015-K16)

摘　　要：使用数值求解含时薛定谔方程的方法计算了不同原子在各种波长和强度的激光照射下的高次谐波谱.发现原子束缚能量与激光波长、强度对谐波谱结构会有不同方面的影响.提出并用数值方法验证了标度律.当不同的原子束缚能量之间相差K倍,只要将激光频率变大K倍,激光强度变大K3倍,谐波谱的结构会保持一致.这说明了标度变换下光电子在激光场中的动力学特征保持不变.标度律为高次谐波的一些可能的应用提供了参考工具.The numerical solution for solving the time-dependent Schrodinger equation is used to calculate the higher harmonic spectrum of different atoms under various lasers of different wavelengths and intensities. We find that the harmonic spectrum is affected in different aspects by atomic binding energy and laser wavelength as well as intensity. A scaling law is presented and verified by numerical simulation. For one atom with binding energy which is K times as large as another one, when laser frequency is improved by K times and laser intensity is enlarged by K-3 times, the harmonic spectrum remains unchanged. The results indicate that photoelectronic dynamics in laser field are the same under scaling transformation. Scaling law can be helpful as a reference tool for some possible applications of high-order harmonics.

关 键 词：高次谐波 强激光场 含时薛定谔方程 标度律 

分 类 号：O437[机械工程—光学工程]