FAR-INFRARED SATURATION SPECTROSCOPY OF A SINGLE SQUARE-WELL

被引：31

作者：

CRAIG, K

FELIX, CL

HEYMAN, JN

MARKELZ, AG

SHERWIN, MS

CAMPMAN, KL

HOPKINS, PF

GOSSARD, AC

机构：

[1] UCSB,DEPT ENGN,SANTA BARBARA,CA 93106

[2] CTR FREE ELECTRON LASER STUDIES,SANTA BARBARA,CA 93106

来源：

SEMICONDUCTOR SCIENCE AND TECHNOLOGY | 1994年 / 9卷 / 05期

关键词：

D O I：

10.1088/0268-1242/9/5S/061

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We have performed saturation spectroscopy measurements of the lowest intersubband transition in a single 400 angstrom GaAs/Al0.3Ga0.7As modulation-doped square quantum well. We couple intense tunable far-infrared radiation from the Santa Barbara free electron laser into our sample using an edge-coupling technique and measure absorption as a function of frequency and intensity. Saturation and frequency shifts in the absorption line are clearly observed. We attribute the frequency shifts to reductions in the many-body depolarization shift. From our preliminary measurements, we estimate the intersubband relaxation time to be 600 ps to within a factor of three.

引用

页码：627 / 629

页数：3

共 6 条

[1] ELECTRONIC-PROPERTIES OF TWO-DIMENSIONAL SYSTEMS [J].