Optical gain spectra due to a one-dimensional electron-hole plasma in quantum-wire lasers

被引:0
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作者
Hayamizu, Y [1 ]
Yoshita, M [1 ]
Itoh, H [1 ]
Akiyama, H [1 ]
Pfeiffer, LN [1 ]
West, KW [1 ]
机构
[1] Univ Tokyo, CREST, JST, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan
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O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We report the first measurement of evolutional optical gain spectra for various electron-hole densities in T-shaped quantum-wire lasers with high structural uniformity at 5 K. At the high excitation power, a broad absorption peak and a sharp gain peak are observed instead of discrete excitonic absorption peaks. It indicates that an electron-hole plasma yield the gain of quantum-wire lasers. Additionally, spectral shape of the gain peak is symmetric, and shows no similarity with one-dimensional (1D) density of states. It suggests influence of strong Coulomb correlations in a quantum wire.
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页码:1575 / 1576
页数:2
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