𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Optical studies of localized excitons in symmetric coupled quantum wells

✍ Scribed by R.J. Stone; J.G. Michels; D. Kinder; C.C. Chang; R.J. Nicholas; A.M. Fox; J.S. Roberts

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
110 KB
Volume
21
Category
Article
ISSN
0749-6036

No coin nor oath required. For personal study only.

✦ Synopsis

We present evidence for coupling between spatially separated excitonic states in a GaAs symmetric coupled quantum well. A split excitonic peak is observed in the photoluminescence spectrum of our sample and is identified as due to islands of monolayer fluctuation in the well width. We use the technique of far-infrared modulated photoluminescence to show that a resonant coupling exists between the excitonic states when the incident far-infrared photon energy is approximately equal to the splitting as measured in the photoluminescence spectrum. The most likely mechanism for this coupling is the dipole-dipole interaction.

πŸ“œ SIMILAR VOLUMES

Nonlinear Photoluminescence Kinetics of
Nonlinear Photoluminescence Kinetics of Indirect Excitons in Coupled Quantum Wells
✍ Butov, L.V. ;Imamoglu, A. ;Shashkin, A.A. ;Dolgopolov, V.T. ;Mintsev, A.V. ;Fekl πŸ“‚ Article πŸ“… 2000 πŸ› John Wiley and Sons 🌐 English βš– 188 KB πŸ‘ 2 views

We report the strongly nonlinear dependence of indirect exciton photoluminescence (PL) kinetics on excitation density. In the indirect regime characterized by a slow exciton recombination, at high excitation densities, low magnetic fields, low temperatures, and for samples with small in-plane disord