薄膜法布里-珀罗滤光片中的超棱镜效应  

Superprism Effect in Thin Film Fabry-Pérot Filter

作　　者：陈海星[1] 顾培夫[1] 吕维阁[1] 金波[1] 李海峰[1] 刘旭[1] 

机构地区：[1]浙江大学现代光学仪器国家重点实验室,杭州310027

出　　处：《光学学报》2006年第1期157-160,共4页Acta Optica Sinica

摘　　要：基于薄膜法布里珀罗滤光片在其峰值波长处具有较大群延迟的特性,设计并从实验上验证了光束倾斜入射时这种结构中存在的超棱镜效应。根据光学薄膜理论中的特征矩阵法,数值模拟计算了器件的群延迟和空间色散曲线,镀制并对器件进行了测试。测试结果表明器件在透射峰值波长处因超棱镜效应引起的空间色散最大位移值达到65μm,与理论计算结果非常吻合;相对于传统的光栅和棱镜器件而言器件具有更高的空间角度色散,实际测试在784.5 nm至786.5 nm波长范围内器件的角色散达到30°/nm。The superprism effect was demonstrated experimentally in a thin film Fabry-Pérot filter based on its large group delay at the wavelength of peak transmittance. The group velocilty delay and the shift caused by the spatial dispersion were numerically simulated by characteristic matrix method used widely in optical thin film theory. The device was fabricated and tested and the results showed that the maximum shift of spatial dispersion due to the superprism effect reached 65 μm at the wavelength of peak transmittance, which consisted well with the design. Compared with the conventional grating element and prism, the device had smaller size and higher spatial angular dispersion, nearly 30°/nm in the range from 784.5 nm to 786.5 nm according to the measurement.

关 键 词：薄膜光学 超棱镜效应 光子晶体 

分 类 号：O484.4[理学—固体物理]