Abstract
数值研究了双色激光脉冲与一维氩原子相互作用的谐波发射功率谱.双色激光脉冲由800 nm和1600 nm的两束激光组成，脉冲持续时间为9.7 fs.计算结果表明，相对相位为π时，谐波截止频率从单色场情形的58 eV大幅度地展宽到316 eV，获得频宽为93 eV的软X射线连续辐射谱.此外，还采用短程的普薛耳－特勒势和长程的软化库仑势进行比对，数值结果表明该连续辐射谱的存在具有普适性.通过半经典的“三步”模型和时频分析小波变换方法对该连续辐射谱进行分析，发现其主要由单一的“短”量子路径生成，直接叠加频率从22
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