Measurement of far-infrared intersubband spontaneous emission from optically pumped quantum wells
- 23 November 1998
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 73 (21) , 3043-3045
- https://doi.org/10.1063/1.122666
Abstract
We present the results of an experiment to measure far-infrared intersubband spontaneous emission from optically pumped quantum wells. A four-level laser design scheme was implemented using a coupled triple quantum well structure for optical pumping from E1 to E4 with a CO2 laser. The phonon scattering rates were designed to optimize the far-infrared emission efficiency and population inversion between E3−E2∼30 meV. The spontaneous emission spectrum was successfully resolved to reveal an emission peak at 30.8 meV with a linewidth of 7 meV.Keywords
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