Compact and broadband waveguide taper based on partial bandgap photonic crystals  

作　　者：侯金 郜定山 吴华明 周治平 

机构地区：[1]Wuhan National Laboratory for Optoelectronics,College of Optoelectronic Science and Engineering,Huazhong University of Science and Technology [2]State Key Laboratory on Advanced Optical Communication Systems and Networks, Peking University [3]School of Electrical and Computer Engineering,Georgia Institute of Technology, Atlanta

出　　处：《Chinese Optics Letters》2009年第4期309-311,共3页中国光学快报（英文版）

基　　金：supported by the National Basic Research Program of China (No. 2006CB708310);the National Natural Science Foundation of China (No.60706013);the Creative Foundation of Wuhan National Laboratory for Optoelectronics (No. P080003).

摘　　要：Partial bandgap characteristics of parallelogram lattice photonic crystals are proposed to suppress the radiation modes in a compact dielectric waveguide taper so as to obtain high transmittance in a large wavelength range. Band structure of the photonic crystals shows that there exists a partial bandgap, The photonie crystals with partial bandgap are then used as the cladding of a waveguide taper to reduce the radiation loss efficiently. In comparison with the conventional dielectric taper and the complete bandgap photonic crystal taper, the partial bandgap photonic crystal taper has a high transmittance of above 85% with a wide band of 170 nm.Partial bandgap characteristics of parallelogram lattice photonic crystals are proposed to suppress the radiation modes in a compact dielectric waveguide taper so as to obtain high transmittance in a large wavelength range. Band structure of the photonic crystals shows that there exists a partial bandgap, The photonie crystals with partial bandgap are then used as the cladding of a waveguide taper to reduce the radiation loss efficiently. In comparison with the conventional dielectric taper and the complete bandgap photonic crystal taper, the partial bandgap photonic crystal taper has a high transmittance of above 85% with a wide band of 170 nm.

关 键 词：Crystal atomic structure Energy gap PHOTONICS Silicon on insulator technology WAVEGUIDES 

分 类 号：TN253[电子电信—物理电子学]