Eur. Phys. J. B 37, 417-419 (2004)
https://doi.org/10.1140/epjb/e2004-00075-3

Design for 2D anisotropic photonic crystal with large absolute band gaps by using a genetic algorithm

¹ Center for Optical and Electromagnetic Research, State Key Laboratory for Modern Optical Instrumentation, Zhejiang University, Yu-Quan, Hangzhou 310027, P.R. China
² Department of Electromagnetic Theory, Royal Institute of Technology, 10044 Stockholm, Sweden

Corresponding author: ^a yz@coer.zju.edu.cn

Received: 30 May 2003
Revised: 1 November 2003
Published online: 9 April 2004

Abstract

A 2-state genetic algorithm (GA) approach is used to design a two-dimensional (2D) anisotropic photonic crystal of square lattice with a maximal absolute band gap. The unit cell is devided equally into many small squares, and each filling pattern of squares with two dielectric materials corresponds to a binary number. As a numerical example, the GA gives a 2D Te structure with a relative width of the absolute band gap of about . After a further optimization, a new structure is obtained with a relative width of the absolute band gap of about .