Observation of optically pumped intersubband emission from quantum wells
- 1 October 1990
- proceedings article
- Published by SPIE-Intl Soc Optical Eng
- p. 74-81
- https://doi.org/10.1117/12.20731
Abstract
We report the first observation of optically pumped spontaneous emission from intersubband transitions by electrons in an n-type GaAs/A1GaAs coupled-quantum-well structure. Electrons were pumped from the first to fourth conduction subbands with a CW CO2 laser operating at a photon energy of 133 meV. The transition from the fourth to the third subbands occurred at an energy of 17 meV and had a full width at half-maximum of 3 meV.Keywords
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