Mechanism of directional emission from a peanut-shaped microcavity

Fang-Jie Shu, Chang-Ling Zou, Fang-Wen Sun, and Yun-Feng Xiao

Phys. Rev. A 83, 053835 – Published 26 May 2011

Abstract

Collimated directional emission is essentially required for an asymmetric resonant cavity. In this paper, we theoretically investigate a type of peanut-shaped microcavity which can support highly directional emission with a beam divergence as small as 2.5°. The mechanism of the collimated emission of this type of peanut-shaped microcavity is explained with a short-term ray trajectory. Moreover, the explanations are also confirmed by a numerical wave simulation. This extremely narrow divergence of the emission holds great potential in highly collimated lasing from on-chip microcavities.

Received 28 January 2011

DOI:https://doi.org/10.1103/PhysRevA.83.053835

Authors & Affiliations

Fang-Jie Shu^1,2,*, Chang-Ling Zou³, Fang-Wen Sun³, and Yun-Feng Xiao^2,†

¹Department of Physics, Shangqiu Normal University, Shangqiu 476000, People's Republic of China
²State Key Lab for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, People's Republic of China
³Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China

^*shufangjie@gmail.com
^†[www.phy.pku.edu.cn/∼yfxiao/index.html]; yfxiao@pku.edu.cn

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Vol. 83, Iss. 5 — May 2011

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