Direct observation of depolarization shift of the intersubband resonance |
| |
Authors: | Graf Sigg Kohler Bachtold |
| |
Institution: | Paul Scherrer Institut, Labor fur Mikro- und Nanotechnologie, CH-5232 Villigen-PSI, Switzerland. |
| |
Abstract: | We have studied the intersubband resonance of GaAs/AlGaAs multi-quantum-well systems by comparing photon drag and absorption spectra obtained by in-plane photocurrent and photoconduction measurements. The peak absorption at room temperature is found to be blueshifted from the photon drag resonance by as much as 33 cm(-1). We argue that this difference gives directly the depolarization shift, since the resonant photon drag current is driven by the Doppler effect, which is a k-vector dependent single particle process. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|