Suppression of Random Lasing Modes in Polycrystalline ZnO Thin-Film by Using Distributed Bragg Reflector

Author

Tsang, Siu H. ; Yu, Siu F. ; Lau, Shu P. ; Yang, Hui Y. ; Li, Xiao Feng

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

Volume

21

Issue

8

fYear

2009

fDate

4/15/2009 12:00:00 AM

Firstpage

549

Lastpage

551

Abstract

Formation of vertical-cavity random laser by using a polycrystalline ZnO thin-film optically coupled to 11.5 pairs of Al₂O₃-ZnO multilayer distributed Bragg reflector (DBR) is proposed. Lasing characteristics of the laser observed from the surface of the polycrystalline ZnO thin film are studied without and with the presence of DBR. It is found that the corresponding spectral linewidth can be limited to about 4 nm at high excitation intensity under the influence of DBR.

Keywords

II-VI semiconductors; aluminium compounds; distributed Bragg reflector lasers; laser beams; semiconductor lasers; spectral line breadth; zinc compounds; Al₂O₃-ZnO; multilayer distributed Bragg reflector; polycrystalline thin-film; random lasing modes; spectral linewidth; vertical-cavity random laser; Distributed Bragg reflectors; Laser excitation; Laser modes; Nonhomogeneous media; Optical coupling; Optical films; Surface emitting lasers; Transistors; Vertical cavity surface emitting lasers; Zinc oxide; Distributed Bragg reflectors (DBRs); random laser; zinc oxide;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2009.2014647

Filename

4808190