光学学报, 2009, 29 (1): 262, 网络出版: 2009-02-10
薄介质板结构中有限光束的多次反射及其重构
Multiple Reflections and Reshaping Effect of Finite-Sized Light Beams in Thin Dielectric Slab Configuration
摘要
利用有限光束在薄介质板结构中多次反射及其重构揭示有限波束透射光束反常侧向位移产生的物理机制; 证明了物理上有限光束出现反常侧向位移的限制条件与稳态相位法成立的数学条件是一致的。通过数值模拟表明, 透射光束的反常侧向位移是因为有限光束在薄介质板结构中每个经过多次反射后具有不同相移的平面波分量重构的结果。对于整个波束而言, 透射光束的反常侧向位移是薄介质板结构中多次透射或反射的波束相干叠加产生的。
Abstract
The physical mechanism of the anomalous lateral displacement of the transmitted finite-sized light beam in a thin dielectric slab configuration is investigated from the view point of the interference between multiple light beams, due to the multiple reflections. The physical restriction, which agrees the mathematical condition of stationary phase approach, is advanced. Numerical stimulation shows that the anomalous lateral displacement is produced by the reshaping of the transmitted components undergoing different phase shifts due to the multiple reflections inside the slab. From the view point of a beam as a whole, the lateral displacement can be understood by the fact that the entire transmitted beam is the result of reshaping of the multiply transmitted beams.
朱绮彪, 陈玺, 李春芳. 薄介质板结构中有限光束的多次反射及其重构[J]. 光学学报, 2009, 29(1): 262. Zhu Qibiao, Chen Xi, Li Chunfang. Multiple Reflections and Reshaping Effect of Finite-Sized Light Beams in Thin Dielectric Slab Configuration[J]. Acta Optica Sinica, 2009, 29(1): 262.