Dependence of lasing threshold on Q factor in a deformed microcavity laser

Ji Won Lee; Hyeon Hye Yu; Chang Hwan Yi; Chil Min Kim

doi:10.1364/OL.39.002676

Dependence of lasing threshold on Q factor in a deformed microcavity laser

Ji Won Lee, Hyeon Hye Yu, Chang Hwan Yi, Chil Min Kim

Department of Physics and Chemistry

Sogang University

Research output: Contribution to journal › Article › peer-review

Abstract

The relationship between lasing threshold and quality (Q) factor is investigated. When a deformed microcavity laser composed of a circular arc and an isosceles trapezoid is excited by current injection, various modes lase in ten emission directions. The lasing modes are classified into four groups, and the lasing threshold of each mode group is obtained according to emission spectra. The Q factor of each mode group is obtained from the resonance by comparing the far-field patterns of resonances with those of mode groups. Through the study, we find that the lasing threshold strongly depends on the Q factor.

Original language	English
Pages (from-to)	2676-2679
Number of pages	4
Journal	Optics Letters
Volume	39
Issue number	9
DOIs	https://doi.org/10.1364/OL.39.002676
State	Published - 1 May 2014

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10.1364/OL.39.002676

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title = "Dependence of lasing threshold on Q factor in a deformed microcavity laser",

abstract = "The relationship between lasing threshold and quality (Q) factor is investigated. When a deformed microcavity laser composed of a circular arc and an isosceles trapezoid is excited by current injection, various modes lase in ten emission directions. The lasing modes are classified into four groups, and the lasing threshold of each mode group is obtained according to emission spectra. The Q factor of each mode group is obtained from the resonance by comparing the far-field patterns of resonances with those of mode groups. Through the study, we find that the lasing threshold strongly depends on the Q factor.",

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AB - The relationship between lasing threshold and quality (Q) factor is investigated. When a deformed microcavity laser composed of a circular arc and an isosceles trapezoid is excited by current injection, various modes lase in ten emission directions. The lasing modes are classified into four groups, and the lasing threshold of each mode group is obtained according to emission spectra. The Q factor of each mode group is obtained from the resonance by comparing the far-field patterns of resonances with those of mode groups. Through the study, we find that the lasing threshold strongly depends on the Q factor.

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JO - Optics Letters

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Dependence of lasing threshold on Q factor in a deformed microcavity laser

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