Coulomb-correlated electron-hole plasma and gain in a quantum-wire laser of high uniformity
Coulomb-correlated electron-hole plasma and gain in a quantum-wire laser of high uniformity
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DOI：
10.1103/physrevb.67.041302
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发表时间：
2002-06
影响因子：
3.7
通讯作者：
H. Akiyama;L. Pfeiffer;M. Yoshita;A. Pinczuk;P. Littlewood;K. West;M. Matthews;J. Wynn
中科院分区：
文献类型：
--
作者：
H. Akiyama;L. Pfeiffer;M. Yoshita;A. Pinczuk;P. Littlewood;K. West;M. Matthews;J. Wynn
在一维（1D）基态下工作的多量子线激光器已经在非常高的均匀性结构中实现，该结构显示出具有前所未有的窄宽度和低激光阈值的自由激子发射。在光泵浦下，自发发射从尖锐的自由激子峰演变为红移宽带。激光光子能量低于自由激子约 5 meV。观察到的偏移排除了激光中的自由激子，我们的结果表明，一维电子-空穴系统中的库仑相互作用会改变自发发射，并在激光增益中发挥重要作用。
A multi-quantum-wire laser operating in the one-dimensional (1D) ground state has been achieved in a very high uniformity structure that shows free-exciton emission with unprecedented narrow width and low lasing threshold. Under optical pumping, the spontaneous emission evolves from a sharp free exciton peak to a redshifted broad band. The lasing photon energy occurs about 5 meV below the free exciton. The observed shift excludes free excitons in lasing and our results show that Coulomb interactions in the 1D electron-hole system shift the spontaneous emission and play significant roles in laser gain.