Time-resolved carrier drag effect in quantum wells and wires

✍ Scribed by Y Nagamune; M Watanabe; M Seyama; K Kinoshita; Y Inagaki; A Takahashi; T Noda; H Sakaki

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 660 KB
• Volume: 2
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/s1386-9477(98)00172-6

✦ Synopsis

We demonstrate time-resolved measurements of carrier drag effect in modulation-doped n-type GaAs/AlGaAs quantum wells and edge wires by using a micro-photoluminescence measurement setup and a novel ultrafast and high repetition shutter camera. As well as we demonstrate time-resolved two-dimensional images of carrier drag effect, we found that the relaxation time of exciton-electron scattering and exciton-lattice scattering are very long in comparison with previous studies and theories. In addition, the relaxation times in the edge-wires is longer than those in the wells, probably resulting in high exciton mobility in the edge wires.