Circularly polarized lasing over wide wavelength range in spin-controlled (110) vertical-cavity surface-emitting laser
| Autor: | Shinji Koh, Satoshi Iba, Hitoshi Kawaguchi, Kazuhiro Ikeda |
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| Rok vydání: | 2012 |
| Předmět: |
Physics
Photoluminescence business.industry Physics::Optics General Chemistry Condensed Matter Physics Laser Polarization (waves) law.invention Vertical-cavity surface-emitting laser Wavelength Optics law Materials Chemistry Optoelectronics business Lasing threshold Circular polarization Quantum well |
| Zdroj: | Solid State Communications. 152:1518-1521 |
| ISSN: | 0038-1098 |
| Popis: | We investigated the emission wavelength dependence of the lasing polarization in a (1 1 0)-oriented vertical-cavity surface-emitting laser (VCSEL) with GaAs/AlGaAs quantum wells under optical spin injection at room temperature. Lasing was observed in the one circularly polarized mode over a wide wavelength range from 838 to 857 nm, in which a degree of circular polarization higher than 0.8 was maintained. The optical gain spectrum that contributed to the circularly polarized lasing is discussed based on the optical selection rules and the measured polarization-resolved photoluminescence spectra of the active layers. |
| Databáze: | OpenAIRE |
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