摘要
利用短时指数传播子的对称分割和快速傅立叶变换等方法 ,对含时薛定谔方程进行了数值求解 ,研究了双色(基频 :780 nm,二倍频 :390 nm)激光场对 H+ 2 离子和 (DμD) + 离子解离的相干控制以及基频激光的波长对相干控制作用的影响 .数值结果显示 ,光解离几率灵敏地随双色光之间的相对相位的变化而变化 ,光解离碎片的动量分布也与相对相位的大小有关 ;H+ 2 离子和 (DμD) + 离子在双色激光场中的光解离情况有很大不同 .
Numerical solution to the time-dependent Schrdinger equation is calculated by using the symmetrical splitting of short-time exponential propagator and fast Fourier transformation (FFT) technique. Taking the relative phase between two laser radiation fields as a controllable parameter, the coherent control of photodissociation of ions H + 2 and (DμD) + subjected to the two-color (fundamental radiation:780 nm, the second harmonic:390 nm) laser fields is calculated. Influences of the fundamental laser wavelength on the coherent control are studied. Numerical results demonstrate that the photodissociation probability is sensitive to relative phase of the two-color laser, and the momentum distribution of fragments are also different with different relative phase at the end of pulse .The photo-dissociation in two-color laser is different between H + 2 and (DμD) +.
出处
《上海大学学报（自然科学版）》
CAS
CSCD
2001年第2期154-158,共5页
Journal of Shanghai University:Natural Science Edition
