项目名称: 光波导中古斯-汉欣(Goos-Hanchen)位移的研究
项目编号: No.10874121
项目类型: 面上项目
立项/批准年度: 2009
项目学科: 金属学与金属工艺
项目作者: 曹庄琪
作者单位: 上海交通大学
项目金额: 40万元
中文摘要: 由于古斯-汉欣(Goos-Hanchen)位移涉及到全内反射、全反射相移、以及反射时延、粒子穿越隧道的时间和波色-爱因斯坦凝聚等物理学的基本问题,因而在物理学的各个分支都受到了广泛的重视。近年来,我们对GH效应及其相关的物理效应进行了深入的理论和实验研究,理论方面取得了以下成果: (1)导出了粒子穿越任意势场的反射时间公式; (2)证明了所谓的量子反射实际上是子波的反射; (3)揭示了超对称WKB近似对所有形状不变势(SIP)能得到精确结果的物理原因; 实验方面开展了以下几项工作: (1)提出GH位移光束穿透界面介质深度的直接体现,并导出了共振激发结构中古斯-汉欣位移增强必须满足的解析公式; (2)通过波长调谐在金属包覆波导表面实现了1.5mm的超大GH位移; (3)利用GH位移开展了滤波、电光系数测量和生物传感的工作; (4)利用超高阶导模的色散而不是材料色散的机制开展了宽带慢波的实验; (5)发现了光波导中强场的光捕获效应。
中文关键词: 古斯-汉欣位移;金属包覆波导;滤波;宽带慢波; 光捕获效应
英文摘要: The Goos-Hanchen effect which refers to the lateral shift of a totally reflected beam from the position predicted by geometrical optics has attracted much attention due to its close relationship with various foundamental physics, such as, total internal reflection, phase shift in total reflection, time delay of reflection, tunneling time and Bose- Einstein Condensates. Recently, a profound study of Goos-Hanchen effect and related physics has been conducted in our group, several achievements have been obtained. Theoretical results include: (1)Generalized reflection time for one-dimensional structures; (2)Quantum reflection is nothing but the reflection of subwaves; (3)Why SWKB approximation is exact for all SIPs. Experimental results include: (1)It is found that the lateral beam shift closely depends on the intrinsic and radiative damping of the resonance mode; (2)1.5mm light beam shift arising from 14pm variation of wavelength; (3)Filtering, measurement of the electro-optic coefficient and biosensing based on Goos-Hanchen effect; (4)Wideband slow light assisted by ultrahigh-order modes; (5)Millisecond-scale switching time of magnetic fluids due to the optical trapping effect in waveguide structure.
英文关键词: Goos-Hanchen shift; Metal-cladding optical waveguide; Filtering; Wideband slow light; Optical trapping effect