We present terahertz emission of optically pumped GaAs/AlGaAs multiple quantum wells (MQWs). The action spectra exhibit emission even at excitation energies below the bandgap. Results show that the radiation could not have come from the bulk layers and is inferred to be due to shallow states under the band edge.
Observation of below-bandgap excited terahertz emission in the action spectra of GaAs/AlGaAs multiple quantum wells
2005-01-01
1777410 byte
Conference paper
Electronic Resource
English
British Library Conference Proceedings | 2005
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