Journal article
Persistence of trions and quenching of excitons in optically induced two-dimensional electron gases in mixed-type GaAs/AlAs quantum wells
Journal of the Optical Society of America. B, Optical physics, Vol.31(12), pp.3138-3143
12/01/2014
DOI: 10.1364/JOSAB.31.003138
Abstract
We report experimental studies of absorption spectra of two-dimensional electron gases (2DEGs) in a GaAs/AlAs mixed-type quantum well (MTQW) structure. The 2DEGs are induced and the corresponding Landau level filling factor is controlled through optical excitations of the narrow well in theMTQW.In an external magnetic field normal to the quantum well plane, the absorption spectra of the 2DEGs are characterized by both exciton and trion resonances. As the filling factor approaches 1, exciton resonances are quenched, while a strong trion resonance persists. These properties make 2DEGs in MTQWs a promising ensemble spin system for pursuing electromagnetically induced transparency and related applications in semiconductors.
Details
- Title: Subtitle
- Persistence of trions and quenching of excitons in optically induced two-dimensional electron gases in mixed-type GaAs/AlAs quantum wells
- Creators
- Thomas K Baldwin - University of OregonCarey Phelps - University of OregonHailin Wang - University of OregonJohn P Prineas - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of the Optical Society of America. B, Optical physics, Vol.31(12), pp.3138-3143
- DOI
- 10.1364/JOSAB.31.003138
- ISSN
- 0740-3224
- eISSN
- 1520-8540
- Grant note
- DOI: 10.13039/100000086, name: Directorate for Mathematical and Physical Sciences (MPS), award: DMR-1104718
- Language
- English
- Date published
- 12/01/2014
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199795902771
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