✦ LIBER ✦
Measurements of far-infrared intersubband absorption linewidths in GaAs/AlGaAs quantum wells as a function of temperature and charge density
✍ Scribed by J.B Williams; K Craig; M.S Sherwin; K Campman; A.C Gossard
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 111 KB
- Volume
- 2
- Category
- Article
- ISSN
- 1386-9477
No coin nor oath required. For personal study only.
✦ Synopsis
Intersubband transitions in doped quantum wells are of fundamental scientific interest, as well as technological interest for potential devices. One of the important characteristics of the transitions is their linewidth. We present the results of linear absorption spectroscopy on a coupled double asymmetric QW structure. Using a backgated sample, we can independently vary the charge density and DC field at the well. The absorption lines appear to be homogeneously broadened. The lines appear to become lifetime broadened for temperatures above 70 K.