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Applied Physics A

Optical gate realization with thin CdS films

B. Ullrich, Ch. Bouchenaki, S. Roth

Published Dec 1, 1991• 16 citations
Publisher
DOI
10.1007/bf00331543

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Recently, we have discovered that the excitation of thin CdS films with the 514.5 nm line causes an all-optical bistable luminescent emission in the near infrared part of the spectrum. A first insight in mechanism and origin of all-optical bistability in luminescence of semiconductors is presented. We show that the initial and final states of the bistable luminescence are determined by the thermal properties of the luminescence intensity of the thin CdS film. However, during the bistable switch of the luminescence thermal effects and electronic ones take place. Thus, all-optical bistability in luminescence is a thermally induced electronic bistability.