Laser oscillations of whispering gallery modes in thiophene/phenylene co-oligomer microrings
Laser oscillations of whispering gallery modes in thiophene/phenylene co-oligomer microrings
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DOI：
10.1063/1.2755925
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发表时间：
2007-07-09
影响因子：
4
通讯作者：
Hotta, Shu
中科院分区：
文献类型：
--
作者：
Fujiwara, Seiji;Bando, Kazuki;Hotta, Shu
Laser oscillation of whispering gallery modes was observed in microring structures of semiconducting thiophene/phenylene co-oligomer (TPCO) crystals at room temperature. Microring structures were formed by dry etching from thin film crystals of TPCO. The thresholds for the laser oscillation of a microring and a thin film crystal are 200 and 1400 mu J/cm(2) for picosecond excitation, respectively. Therefore, the threshold for the microring was reduced to 1/7 of that for the thin film crystal. The dramatic reduction of threshold clearly demonstrates the importance of microcavity in making efficient organic semiconductor lasers. (C) 2007 American Institute of Physics.
