Ring-shaped two-dimensional photonic crystal structures showing large higher-order stop-bands

Author

Zarei, Sanaz ; Shahabadi, Mahmoud ; Zarei, Ali

Author_Institution

Photonics Res. Lab., Univ. of Tehran, Tehran, Iran

fYear

2010

Firstpage

1

Lastpage

3

Abstract

Large absolute higher-order stop-bands are realized in two-dimensional photonic crystals of a square lattice with ring-shaped features using a real-valued genetic algorithm. The idea of the photonic crystals with ring-shaped features comes from the phenomenon of formation of the Arago spot in the middle of circular patterns in the process of optical lithography. As a result of the optimization, two structures showing large absolute higher-order stop-bands are obtained. The maximum absolute bandwidth of the higher-order band-gaps for the obtained structures is 0.1646(2πc/a), which is larger than the so far reported values for higher-order bands.

Keywords

genetic algorithms; optical fabrication; photolithography; photonic crystals; 2D photonic crystal structures; Arago spot; higher-order stop-bands; optical lithography; real-valued genetic algorithms; square lattice; Algorithm design and analysis; Bandwidth; Frequency; Genetic algorithms; Genetic engineering; Optical computing; Optical device fabrication; Photonic band gap; Photonic crystals; Shape; genetic algorithm; higher-order stop-bands; photonic band-gap materials; photonic crystals;

fLanguage

English

Publisher

ieee

Conference_Titel

Transparent Optical Networks (ICTON), 2010 12th International Conference on

Conference_Location

Munich

Print_ISBN

978-1-4244-7799-9

Electronic_ISBN

978-1-4244-7797-5

Type

conf

DOI

10.1109/ICTON.2010.5549312

Filename

5549312