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Room temperature observation of mid-infrared inter-subband absorption activated by near-infrared illumination in multiple quantum wells

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5 Author(s)
Delacourt, D. ; Thomson-CSF/LCR, Domaine de Corbeville, Orsay, France ; Papillon, D. ; Pocholle, J.P. ; Schnell, J.P.
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The authors report the near-infrared optical activation of inter-subband 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 mu m has been observed at room temperature under a 320 W/cm2 near-infrared illumination at 0.835 mu m.

Published in:

Electronics Letters  (Volume:26 ,  Issue: 5 )