Room temperature observation of mid-infrared inter-subband absorption activated by near-infrared illumination in multiple quantum wells
- 1 March 1990
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 26 (5) , 277-279
- https://doi.org/10.1049/el:19900184
Abstract
We report the near-infrared optical activation of intersubband transitions in a 250 period GaAs/Ga0.75Al0.25As multiple quantum well structure free from intentional doping (undoped). A 0.5% resonant absorption peak around 10.2 μm has been observed at room temperature under a 320 W/cm2 near-infrared illumination at 0.835 μn.Keywords
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