Critical Phenomena in Periodic Stratified Media Due to Time-Varying Dielectric Permittivity functions
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Critical Phenomena in Periodic Stratified Media Due to Time-Varying Dielectric Permittivity functions
- 发表刊物：
- Journal of the Optical Society of America B
- 摘要：
- The critical phenomena in a one-dimensional periodic stratified media with time-varying dielectric permittivity functions are theoretically investigated for both TM and TE waves by solving the time-dependent electric displacement equation and magnetic field equation, respectively. It is found that there exists a critical value of the varying amplitude when the dielectric permittivity function is changing with time. When the varying amplitude is below or at the critical value, the periodic structure can reflect an incident plane wave into a periodic femtosecond pulse train with respect to time. On the other hand, when the varying amplitude is much above the critical value, the reflectivity is descending more rapidly with time, which means that at one moment the incident light is transmitted thoroughly and the periodic structure is becoming transparency. The effect of the layer number on the reflectivity is also presented. Especially at the critical value, the pulse train generated is periodic with almost 100% peaks and zero troughs for both TM and TE waves when the layer number is up to 11. These interesting conclusions would find potential realistic applications in the future.
- 合写作者：
- Jiu Hui Wu, Li Shen
- 卷号：
- Vol. 28, No. 5
- 页面范围：
- 1328–1334
- 是否译文：
- 否
- 发表时间：
- 2011-04-09