块体材料和纳米薄膜表面纳米局域电子态谐波的非摄动产生

3区 物理与天体物理 Q1 Materials Science
J. Seres, E. Seres, E. Céspedes, L. Martínez-de-Olcoz, M. Zabala, T. Schumm
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引用次数: 1

摘要

近年来,固体晶体中高次谐波的产生受到了广泛的关注。利用波长为0.8µm的驱动激光器和28fs的超短脉冲,我们给出了实验结果,并结合理论考虑,表明当激光强度处于非摄动状态时,谐波的实际来源是材料表面的纳米级局域和瞬态电子态。将谐波产生的键模型调整到非摄动状态,并包括该过程的量子特征,提供了一种局域激发方法,该方法正确描述了谐波信号的测量偏振依赖性,反映了被测材料的微观表面结构和对称性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Nonperturbative Generation of Harmonics by Nanometer-Scale Localized Electronic States on the Surface of Bulk Materials and Nano-Films
The generation of high-order harmonics in solid crystals has received considerable attention recently. Using a driver laser with 0.8 µm wavelength and 28 fs ultrashort pulses, we present experimental results, accompanied with theoretical considerations, suggesting that the actual sources of the harmonics are nanometer-sized localized and transient electronic states on the surface of the materials when the laser intensity is in the non-perturbative regime. Adaptation of the bond model of the harmonic generation into the non-perturbative regime and including the quantum features of the process provide a localized excitation approach that correctly describes the measured polarization dependence of the harmonic signal, reflecting the microscopic surface structure and symmetries of the examined materials.
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来源期刊
Progress in Optics
Progress in Optics 物理-光学
CiteScore
4.50
自引率
0.00%
发文量
8
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