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20 February 1998 Room-temperature excitonic optical properties in ZnSe-ZnS/GaAs multiple quantum wells
De Zen Shen, Hongyu Li, Jiying Zhang, Xiwu Fan
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Proceedings Volume 3175, Third International Conference on Thin Film Physics and Applications; (1998) https://doi.org/10.1117/12.300723
Event: Third International Conference on Thin Film Physics and Applications, 1997, Shanghai, China
Abstract
Excitonic optical bistability with nanosecond switching time in ZnSe-ZnS multiple quantum wells (MQWs) with a Fabry-Perot (FP) cavity is investigated at room temperature. The research result indicates that the threshold and contrast ratio for the optical bistability in ZnSe-ZnS MQWs with a FP cavity are about 0.2 MW/cm2 and 6:1, respectively. On the basis of the room temperature excitonic absorption spectra obtained here, we attribute the major nonlinear mechanism for the optical bistability to the excitonic saturating absorption due to phase space filling of excitonic states and excitonic band broadening.
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De Zen Shen, Hongyu Li, Jiying Zhang, and Xiwu Fan "Room-temperature excitonic optical properties in ZnSe-ZnS/GaAs multiple quantum wells", Proc. SPIE 3175, Third International Conference on Thin Film Physics and Applications, (20 February 1998); https://doi.org/10.1117/12.300723
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KEYWORDS
Quantum wells
Bistability
Optical properties
Absorption
Fabry–Perot interferometers
Nonlinear optics
Switching
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