Cylindrical Microcavity Laser Based on the Evanescent-Wave-Coupled Gain

Hee-Jong Moon, Young-Tak Chough, and Kyungwon An
Phys. Rev. Lett. 85, 3161 – Published 9 October 2000
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Abstract

A microcavity laser based on the gain only in the evanescent field region of whispering gallery modes has been demonstrated. A cylindrical microcavity of 125μm diam was surrounded by rhodamine 6G dye molecules in an ethanol solution of lower refractive index such that whispering gallery modes of the microcavity underwent laser oscillation when the dye molecules in the evanescent field region outside the cavity were excited by a second harmonic of a Nd:YAG laser. For particular pumping spots, single-mode laser oscillation of a transverse magnetic mode was observed at about 600 nm with associated cavity Q of 3×107.

  • Received 14 March 2000

DOI:https://doi.org/10.1103/PhysRevLett.85.3161

©2000 American Physical Society

Authors & Affiliations

Hee-Jong Moon, Young-Tak Chough, and Kyungwon An

  • Center for Macroscopic Quantum-Field Lasers, Korea Advanced Institute of Science and Technology, Taejon 305-701, Korea

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Vol. 85, Iss. 15 — 9 October 2000

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