强激光场中模型氢原子的势函数对产生高次谐波强度的影响

摘要

By constructing one-dimensional model potential function with variable parameters, we investigate the high order harmonic generation (HHG) of one-dimensional model hydrogen atoms and real hydrogen atom with same ground state energy in 1 cycle and 16 cycles of intense laser fields. Our results show that in the over-barrier ionization region, the intensities of HHG for one-dimensional model atoms with different potential parameters are closely related with the depth of the potential well, but independent of the Coulomb singularity of the potential.%在保证一维模型氢原子基态能量不变的前提下,通过构造一个可调参数的势函数,研究了在单个周期和多个周期激光作用下,取不同参数势函数一维模型氢原子产生的高次谐波谱规律.结果表明,在过垒电离区域,一维模型氢原子的高次谐波强度与势函数势阱的深度有关,与势函数是否存在库仑奇点没有直接关系.