Optical differentiator based on rapid collapse of Wannier-Stark localization due to space charge

Hosoda, M.; Tominaga, K.
December 1994
Applied Physics Letters;12/5/1994, Vol. 65 Issue 23, p2913
Academic Journal
Demonstrates an optical differentiator operation using a gallium arsenide/aluminum arsenide short-period superlattice. Effect of electric field screening by photogenerated space charges on Wannier-Stark localization; Display of photocurrent spectra for strong optical excitation; Impact of electric field screening on optical absorption.


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