We demonstrate the enhancement of harmonics in the vicinity of 32 nm while generating them in the Mo laser-produced plasma. The enhanced harmonics centered at around the 25th harmonic of 806 nm radiation were analyzed by different means (delay between heating and driving pulses, dependences of harmonic yield on the driving and heating pulse intensities and durations, different regimes of plasma formation, two-color pump of plasma, application of chirped pulses, etc). The role of strong ionic transition possessing large oscillator strength leading to the growth of the nonlinear optical response is discussed. Comparative studies using molybdenum, silver, and chromium laser-produced plasmas are presented. To validate the experimental findings, we numerically simulate harmonic generation from Mo using full-dimensional, all-electron, first-principles calculations. The calculated harmonic spectra exhibit a prominent peak around 32 nm and a suppression around 36–38 nm, successfully rep...

中文翻译：

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飞秒脉冲穿过钼等离子体的传播过程中，在32 nm光谱范围附近的谐波共振增强

我们证明了在Mo激光产生的等离子体中产生谐波时，会增强32 nm附近的谐波。以不同方式分析了以806 nm辐射的第25个谐波为中心的增强谐波（加热和驱动脉冲之间的延迟，谐波产量对驱动和加热脉冲强度和持续时间的依赖性，不同的等离子体形成方式，双色泵浦）等离子体，application脉冲的施加等）。讨论了具有大振荡器强度的强离子跃迁的作用，该非线性跃迁导致非线性光学响应的​​增长。提出了使用钼，银和铬激光产生的等离子体的比较研究。为了验证实验结果，我们使用全维，全电子，第一性原理计算。计算出的谐波光谱在32 nm附近表现出一个突出的峰，在36–38 nm附近表现出抑制，成功地重复了...