Compact beam splitters based on self-imaging phenomena in one-dimensional photonic crystal waveguides  

作　　者：陈兵 黄琳 李永东 刘纯亮 刘贵忠 

机构地区：[1]Key Laboratory of Physical Electronics and Devices of the Ministry of Education,Xi'an Jiaotong University [2]Institute of Information and Communication Engineering,Xi'an Jiaotong University

出　　处：《Chinese Optics Letters》2012年第11期28-31,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61007027);the Fundamental Research Funds for Central Universities,China

摘　　要：A fundamental 1× 2 beam splitter based on the self-imaging phenomena in multi-mode one-dimensional （1D） photonic crystal （PC） waveguides is presented, and its transmission characteristics are investigated using the finite-difference time-domain method. Calculated results indicate that a high transmittance （〉95%） can be observed within a wide frequency band for the 1×2 beam splitter without complicated structural optimizations. In this letter, a simple and compact 1×4 beam splitter is constructed by combining the fundamental 1×2 beam splitter with the flexible bends of 1D PC waveguides. Such beam splitters can be applied to highly dense photonic integrated circuits.A fundamental 1× 2 beam splitter based on the self-imaging phenomena in multi-mode one-dimensional （1D） photonic crystal （PC） waveguides is presented, and its transmission characteristics are investigated using the finite-difference time-domain method. Calculated results indicate that a high transmittance （〉95%） can be observed within a wide frequency band for the 1×2 beam splitter without complicated structural optimizations. In this letter, a simple and compact 1×4 beam splitter is constructed by combining the fundamental 1×2 beam splitter with the flexible bends of 1D PC waveguides. Such beam splitters can be applied to highly dense photonic integrated circuits.

关 键 词：Finite difference time domain method Frequency bands Laser optics Optical instruments Optical waveguides Photonic crystals Structural optimization Time domain analysis WAVEGUIDES 

分 类 号：TN814.6[电子电信—信息与通信工程]