Selective excitation of Fabry-Perot or whispering-gallery mode-type lasing in GaN microrods

Lasing from long semiconductor nanorods is dictated by Fabry-Perot (FP) resonances whereas that from large-diameter microrods is determined by whispering gallery modes (WGMs). Lengths and diameters intermediate between the two systems represent an important size regime for photonics and electronics,...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics letters 2014-11, Vol.105 (20)
Main Authors: Baek, Hyeonjun, Hyun, Jerome K., Chung, Kunook, Oh, Hongseok, Yi, Gyu-Chul
Format: Article
Language:English
Subjects:
Applied physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
EXCITATION
GALLIUM NITRIDES
LASERS
Lasing
Nanorods
NANOSTRUCTURES
Photonics
POLARIZATION
RESONANCE
SEMICONDUCTOR MATERIALS
SIMULATION
Statistical analysis
Time domain analysis
Whispering gallery modes
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Lasing from long semiconductor nanorods is dictated by Fabry-Perot (FP) resonances whereas that from large-diameter microrods is determined by whispering gallery modes (WGMs). Lengths and diameters intermediate between the two systems represent an important size regime for photonics and electronics, but have not been studied in detail. Here, we report on the detection of FP and WGM lasing emissions from a single GaN microrod, and demonstrate the ability to switch between the two lasing mechanisms by translating the excitation beam along the microrod. The competition between FP and WGM-type lasing was studied by finite-difference time-domain simulation and statistical analysis by measuring microrods of various diameters. Finally, control over the relative lasing intensities originating from either FPs or WGMs was demonstrated by tuning the polarization of the emission.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4902373