Reduced Lasing Threshold in Thiophene/Phenylene Co-Oligomer Crystalline Microdisks

Circular microdisks 2, 4, and 8 μm in diameter were made of thiophene/phenylene co-oligomer (TPCO) crystalline thin films. Vapor deposition at 120 °C forms high-quality TPCO crystalline films. Lasing threshold is reduced by both the improvement of crystalline quality and decrease of the diameter of...

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Bibliographic Details
Published in:Applied physics express 2010-01, Vol.3 (1), p.012702-012702-3
Main Authors: Ido, Yasuki, Masumoto, Yasuaki, Sasaki, Fumio, Mori, Masahiko, Haraichi, Satoshi, Hotta, Shu
Format: Article
Language:English
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Summary:Circular microdisks 2, 4, and 8 μm in diameter were made of thiophene/phenylene co-oligomer (TPCO) crystalline thin films. Vapor deposition at 120 °C forms high-quality TPCO crystalline films. Lasing threshold is reduced by both the improvement of crystalline quality and decrease of the diameter of microdisks. Threshold reduction caused by the decrease of the diameter reflects the decrease of number of whispering gallery modes and increase of the cavity mode separation according to cavity quantum electrodynamics.
ISSN:1882-0778
1882-0786
DOI:10.1143/APEX.3.012702