量子电子学报2017，Vol.34Issue(2)：212-219,8.DOI:10.3969/j.issn.1007-5461.2017.02.012
优化有效势模型与拟谱法在碱金属原子高次谐波产生研究中的应用
Application of optimized effective potential model and pseudospectral method in high-order-harmonic generation of alkaline metal atoms
摘要
Abstract
By combining the numerical-parameterized optimized effective potential (NPOEP) model and pseudospectral method,the high-harmonics generation(HHG) process of alkaline metal atoms in intense laser field is investigated.The evolution matrix is modified based on the features of NPOEP model.The orthogonality of time-dependent wave function with closed-shell orbit in evolution process is ensured.The mid-infrared laser field with a wavelength of 3038 nm and intensity of about 1013 W/cm2 is chosen as the driving field,and the high-order-harmonic spectra of lithium,sodium and potassium atoms are calculated.Contributions of bound state transition harmonics of Rydberg state sodium atom on harmonic generation are investigated.Results show that the resonance of Rydberg and ground state can make the low-order harmonic intensity increase by one order of magnitude.It is verified that the method is reliable in describing the process of electron recapture during time evolution.关键词
非线性光学/高次谐波/有效势/碱金属原子/中红外激光/里德伯态钠原子Key words
nonlinear optics/high-harmonics/effective potential/alkaline metal atoms/mid-infrared laser/Rydberg state sodium atom分类
数理科学引用本文复制引用
张硕,乔豪学..优化有效势模型与拟谱法在碱金属原子高次谐波产生研究中的应用[J].量子电子学报,2017,34(2):212-219,8.基金项目
Supported by National Natural Science Foundation of China(国家自然科学基金,11274246) （国家自然科学基金,11274246）
