T-shaped GaAs quantum-wire lasers and the exciton Mott transition
T-shaped GaAs quantum-wire lasers and the exciton Mott transition
复制标题
T 形砷化镓量子线激光器和激子莫特跃迁
DOI:
10.1088/0953-8984/19/29/295217
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发表时间:
2007
期刊:
影响因子:
--
通讯作者:
K. West
中科院分区:
文献类型:
--
作者:
M. Yoshita;Shuman Liu;M. Okano;Y. Hayamizu;H. Akiyama;L. Pfeiffer;K. West
T-shaped GaAs quantum-wire (T-wire) lasers fabricated by the cleaved-edge overgrowth method with molecular beam epitaxy on the interface improved by a growth-interrupt high-temperature anneal are measured to study the laser device physics and fundamental many-body physics in clean one-dimensional (1D) systems. A current-injection T-wire laser that has 20 periods of T-wires in the active region and a 0.5 mm long cavity with high-reflection coatings shows a low threshold current of 0.27 mA at 30 K. The origin of the laser gain above the lasing threshold is studied with the high-quality T-wire lasers by means of optical pumping. The lasing energy is about 5 meV below the photoluminescence (PL) peak of free excitons, and is on the electron–hole (e–h) plasma PL band at a high e–h carrier density. The observed energy shift excludes the laser gain due to free excitons, and it suggests a contribution from the e–h plasma instead. A systematic micro-PL study reveals that the PL evolves with the e–h density from a sharp exciton peak, via a biexciton peak, to an e–h-plasma PL band. The data demonstrate an important role of biexcitons in the exciton Mott transition. Comparison with microscopic theories points out some problems in the picture of the exciton Mott transition.
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影响因子:
4
作者:
H. Akiyama;L. Pfeiffer;M. Yoshita;A. Pinczuk;K. West
通讯作者:
H. Akiyama;L. Pfeiffer;M. Yoshita;A. Pinczuk;K. West
影响因子:
4
作者:
M. Yoshita;H. Akiyama;L. Pfeiffer;K. West
通讯作者:
M. Yoshita;H. Akiyama;L. Pfeiffer;K. West
DOI:
--
发表时间:
2003
期刊:
J.Cryst.Growth. 251
影响因子:
--
作者:
M.Yoshita;J.W.Oh;H.Akiyama;L.N.Pfeiffer;K.W.West
通讯作者:
K.W.West
影响因子:
4
作者:
Y. Hayamizu;M. Yoshita;S. Watanabe;H. Akiyama;L. Pfeiffer;K. West
通讯作者:
Y. Hayamizu;M. Yoshita;S. Watanabe;H. Akiyama;L. Pfeiffer;K. West
影响因子:
4
作者:
ARAKAWA, Y;SAKAKI, H
通讯作者:
SAKAKI, H