Octagonal Quasi-Photonic Crystal Single-Defect Microcavity With Whispering Gallery Mode and Condensed Device Size

Author

Lee, Po-Tsung ; Lu, T.-W. ; Tsai, Feng-Mao

Author_Institution

Dept. of Photonics, Nat. Chiao Tung Univ., Hsinchu

Volume

19

Issue

9

fYear

2007

fDate

5/1/2007 12:00:00 AM

Firstpage

710

Lastpage

712

Abstract

We propose a new single-defect microcavity which supports well-confined whispering gallery mode in octagonal quasi-photonic crystals (OQPC) by shifting the eight nearest air holes around the cavity. Lasing action is observed and compared with the calculated results obtained using the finite-difference time-domain method. We also investigate the threshold dependence on the number of lattice periods of this OQPC microcavity and compare it with triangular lattice photonic crystal (PC) microcavity with similar cavity size. The OQPC microcavity exhibits only a 36% increase of threshold when the number of lattice periods decreases from eight to four, which is more advantageous than the triangular lattice PC microcavity for the shrinkage of device size

Keywords

finite difference time-domain analysis; microcavity lasers; photonic crystals; semiconductor lasers; whispering gallery modes; condensed device size; finite-difference time-domain method; lasing action; lattice periods; octagonal quasiphotonic crystal; photonic crystal microcavity; quasiphotonic crystal microcavity; semiconductor lasers; single-defect microcavity; triangular lattice microcavity; whispering gallery mode; Anisotropic magnetoresistance; Educational institutions; Finite difference methods; Frequency; Laser fusion; Lattices; Microcavities; Photonic crystals; Time domain analysis; Whispering gallery modes; Microcavity; quasi-photonic crystal (QPC); semiconductor lasers;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2007.895054

Filename

4181729