Measurement of far-infrared intersubband spontaneous emission from optically pumped quantum wells

被引:15
|
作者
Lyubomirsky, I [1 ]
Hu, Q
Melloch, MR
机构
[1] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA
[2] MIT, Elect Res Lab, Cambridge, MA 02139 USA
[3] Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA
关键词
D O I
10.1063/1.122666
中图分类号
O59 [应用物理学];
学科分类号
摘要
We present the results of an experiment to measure far-infrared intersubband spontaneous emission from optically pumped quantum wells. A four-level laser design scheme was implemented using a coupled triple quantum well structure for optical pumping from E-1 to E-4 with a CO2 laser. The phonon scattering rates were designed to optimize the far- infrared emission efficiency and population inversion between E-3-E(2)similar to 30 meV. The spontaneous emission spectrum was successfully resolved to reveal an emission peak at 30.8 meV with a linewidth of 7 meV. (C) 1998 American Institute of Physics. [S0003-6951(98)01847-6].
引用
收藏
页码:3043 / 3045
页数:3
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