Subpicosecond excitonic electroabsorption in room-temperature quantum wells

Knox, W. H.; Miller, D. A. B.; Damen, T. C.; Chemla, D. S.; Shank, C. V.; Gossard, A. C.
March 1986
Applied Physics Letters;3/31/1986, Vol. 48 Issue 13, p864
Academic Journal
We investigate the dynamics of excitonic optical absorption in room-temperature GaAs quantum wells during the application of a rapidly changing electric field in the plane of the quantum well layers. We obtain electroabsorptive modulation with a response time constant of 330 fs, which is the fastest ever reported in a semiconductor.


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