【作者】 曹庄琪；

【Author】 Zhuangqi Cao Guided-Wave Photonics Group, Department of Physics, Shanghai Jiao Tong University

【机构】 上海交通大学物理系导波光子学实验室；

【摘要】 本文解释了由古斯-汉欣位移引出的违反相对论的因果律佯谬问题;导出了共振激发下古斯-汉欣位移增强必须满足的条件;在此基础上,用波长为860nm的半导体激光在实验上获得了迄今为止最大的0.9mm的正向位移和0.2mm的负向位移;同时,利用双面金属包覆波导中超高阶导模的特殊性质和增强的古斯-汉欣位移实现了高灵敏的位移和溶液浓度的传感以及观察空间色散的超棱镜效应。更多还原

【Abstract】 Explanation of the causality paradox on the negative group delay time which is caused by the Goos-Hnchen effect in the frustrated Gires-Tournois interferometer is presented in this paper. We also derived a simple theoretical formula to describe the enhancement of the Goos-Hnchen shift during the resonant excitation. Based on this theory, a positive shift of 0. 9mm and a negative shift of 0. 2mm are observed with a laser of the wavelength of 860n m, which to our knowledge are the largest experimental results ever reported. Furthermore, the superprism effect and high sensitivity sensors of the displacement and the solution concentration are demonstrated based on the characteristics of the ultrahigh-order modes in symmetrical metal-cladding optical waveguides.更多还原