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Author Liying Liu ♦ Lei Shang ♦ Lei Xu
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2008
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations ♦ Applied physics
Abstract Two basic types of resonances exist in microcavities. One is whispering gallery mode (WGM) resonance which occurs particularly in circular and elliptical-shaped micro-disks. The other type of resonance is multiple-bouncing periodic orbit. Bow-tie bouncing modes found in a quadruple-shaped cavity and some types of scar modes in chaotic systems are typical examples. Emission directionality from a microcavity is an important property because achieving highly collimated emission (comparable to that of a bulk laser system) from microcavity lasers is essential to obtain high brightness micro-light sources for coupling with other optical systems. Asymmetric resonant cavities (ABCs) have been designed and fabricated to achieve laser emissions with directionality, however, the beam divergences of all those reported ABCs were found to be of ten degrees at least. In this work, we report an observation of directional laser emission with extremely narrow divergence (about 2deg) from a peanut-shaped microcavity. This narrow divergence is very promising for the microcavity to be used as micro-lasers with high brightness. We also demonstrated that the real resonance in a peanut-shaped microcavity is a very special hybrid resonance which combines a whispering gallery orbit and a two-bouncing orbit.
Description Author affiliation: Dept. of Opt. Sci. & Eng., Fudan Univ., Shanghai (Liying Liu; Lei Shang; Lei Xu)
ISBN 9781424426256
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2008-06-22
Publisher Place Greece
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 211.89 kB
Page Count 1
Starting Page 217
Ending Page 217

Source: IEEE Xplore Digital Library