Carrier-density-dependent increase and suppression of optical gain in T-shaped quantum-wire lasers

Masahiro Yoshita, Makoto Okano, Toshiyuki Ihara, Hidefumi Akiyama, Ping Huai, Tetsuo Ogawa, Loren N. Pfeiffer, Ken W. West

研究成果: Conference article査読

3 被引用数 (Scopus)


Carrier-density dependence of the optical-gain spectra were studied for an undoped T-shaped quantum-wire (T wire) laser by optical pumping at 4 K. The gain appeared at a low excitation power of 3 mW corresponding to the carrier density of about 3 × 105 cm-1 in the T wire. As the carrier density was increased, the peak gain increased, but it reached a maximum value of about 1 × 104 cm-1 at the carrier density of 1 × 106 cm-1 and then decreased hereafter. This peculiar gain evolution dependent on the carrier density was not explained by a simple free-electron model, which suggests significant contributions of the enhanced Coulomb interactions to the optical gain in the T-wire laser.

ジャーナルPhysica Status Solidi (C) Current Topics in Solid State Physics
出版ステータスPublished - 2008 12月 1
イベント34th International Symposium on Compound Semiconductors, ISCS-2007 - Kyoto, Japan
継続期間: 2007 10月 152007 10月 18

ASJC Scopus subject areas

  • 凝縮系物理学


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