High-gain excitonic lasing from a single InAs monolayer in bulk GaAs
作者:
A. R. Gon˜i,
M. Stroh,
C. Thomsen,
F. Heinrichsdorff,
V. Tu¨rck,
A. Krost,
D. Bimberg,
期刊:
Applied Physics Letters
(AIP Available online 1998)
卷期:
Volume 72,
issue 12
页码: 1433-1435
ISSN:0003-6951
年代: 1998
DOI:10.1063/1.120586
出版商: AIP
数据来源: AIP
摘要:
We report the observation of highly efficient laser emission from a single InAs layer with an effective thickness of 1.5 monolayers (ML) embedded in bulklike GaAs. Lasing action is obtained at the wavelength of the InAs thin-layer luminescence (870 nm) by cw optical pumping with a threshold power density of0.9(3) kW/cm2at 10 K. Gain measurements yield a very high material gain of1.0(5)×104 cm−1for the InAs layer when pumped with∼10 kW/cm2at low temperatures. The 0 dimensional character of the emission as determined from cathodoluminescence and the absence of band-gap renormalization with increasing pump level speak for an excitonic mechanism of population inversion. ©1998 American Institute of Physics.
点击下载:
PDF
(73KB)
返 回