声波存在下的光学渡越辐射
Optical transition radiation in presence of acoustic waves
摘要：
研究了在有限厚平板中激发的超声超晶格中相对论电子的渡越辐射。在准经典近似下，导出了电磁场的矢势公式和辐射强度的谱角分布公式。声波在辐射强度的光谱和角分布中产生新的共振峰。可以通过选择声波的参数来调谐峰的高度。
英文摘要：
Transition radiation from relativistic electrons is investigated in an ultrasonic superlattice excited in a finite thickness plate. In the quasi-classical approximation formulae are derived for the vector potential of the electromagnetic field and for the spectral-angular distribution of the radiation intensity. The acoustic waves generate new resonance peaks in the spectral and angular distribution of the radiation intensity. The heights of the peaks can be tuned by choosing the parameters of the acoustic wave.
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