Spatial separation of spectrum inside the tapered metamaterial optical waveguide  

作　　者：CHENG XiaoChao FU QuanHong ZHAO XiaoPeng 

机构地区：[1]Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710129, China

出　　处：《Chinese Science Bulletin》2011年第2期209-214,共6页

基　　金：supported by the National Natural Science Foundation of China(50632030 and 50872113);the National Basic Research Program of China(2004CB719805);the Defense Basic Research Program of China

摘　　要：In this work,the optical metamaterials based on silver dendritic cells are prepared by electrochemical deposition,and its transmission and focusing behaviors are investigated.The experimental results show that the optical metamaterials reveal a multiple pass-band transmission spectrum and a prominent focusing effect at the wavelength corresponding to the maximum transmission coefficient.Two optical metamaterial samples are combined into a tapered optical waveguide,and the spectra of transmitted light at the surface of the tapered optical waveguide is measured by using the fiber spectrometer along the light propagation direction.The results demonstrate that each frequency component of the wave packet is stopped at a different waveguide thickness,leading to the spatial separation of its spectrum.The spatial separation of spectrum can be effectively tuned by adjusting the inclination of the tapered optical waveguide,which can be used for storing photons and slow-light research.In this work, the optical metamaterials based on silver dendritic cells are prepared by electrochemical deposition, and its transmission and focusing behaviors are investigated. The experimental results show that the optical metamaterials reveal a multiple pass-band transmission spectrum and a prominent focusing effect at the wavelength corresponding to the maximum transmission coefficient. Two optical metamaterial samples are combined into a tapered optical waveguide, and the spectra of transmitted light at the surface of the tapered optical waveguide is measured by using the fiber spectrometer along the light propagation direction. The results demonstrate that each frequency component of the wave packet is stopped at a different waveguide thickness, leading to the spatial separation of its spectrum. The spatial separation of spectrum can be effectively tuned by adjusting the inclination of the tapered optical waveguide, which can be used for storing photons and slow-light research.

关 键 词：介质光波导 锥形波导 谱空间 分离 光纤光谱仪 频谱 传输系数 电化学沉积 

分 类 号：O177.5[理学—数学] TN252[理学—基础数学]