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Optica Publishing Group
  • International Quantum Electronics Conference
  • OSA Technical Digest (Optica Publishing Group, 1984),
  • paper PDC6

Blue Shift of the Exciton Resonance due to Exciton-Exciton Interactions in a Multiple-Quantum-Well Structure

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Abstract

Multiple-quantum-well structures (MQWS) are attracting much interest for their potential use as efficient active devices in optoelectronics and nonlinear optical signal processing. Based on their strong excitonic optical nonlinearity, operation of MQWS as optical bistable elements and logical gates has been demonstrated both at low and room temperatures. To obtain information about the intrinsic response time of such devices, we have investigated the dynamics of exciton screening of a MQWS with subpicosecond resolution, at T = 15 K and T = 220 K. We have observed an unexpected shift of the exciton resonance to higher energy as a result of exciton-exciton interactions.

© 1984 Optical Society of America

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