学術雑誌論文 Double threshold behavior in a resonance-controlled ZnO random laser

Niyuki, Ryo  ,  Fujiwara, Hideki  ,  Nakamura, Toshihiro  ,  Ishikawa, Yoshie  ,  Koshizaki, Naoto  ,  Tsuji, Takeshi  ,  Sasaki, Keiji

2 ( 3 )  , p.36101 , 2017-03 , American Institute of Physics (AIP)
ISSN:2378-0967
内容記述
We observed unusual lasing characteristics, such as double thresholds and blue-shift of lasing peak, in a resonance-controlled ZnO random laser. From the analysis of lasing threshold carrier density, we found that the lasing at 1st and 2nd thresholds possibly arises from different mechanisms; the lasing at 1st threshold involves exciton recombination, whereas the lasing at 2nd threshold is caused by electron-hole plasma recombination, which is the typical origin of conventional random lasers. These phenomena are very similar to the transition from polariton lasing to photon lasing observed in a well-defined cavity laser.
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http://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/65347/1/1.4974334.pdf

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