研制了室温CdxZn1-xTe/ZnTe多量子阱法布里-珀罗(F-P)腔光双稳器件,并在该器件上观察到皮秒量级的室温激子光双稳。研究结果表明,CdxZn1-xTe/ZnTe多量子阱光双稳器件的光双稳阈值和对比度分别为363 kW/cm2和4:1。根据CdxZn1-xTe/ZnTe多量子阱的吸收谱和激子非线性理论,归结CdxZn1-xTe/ZnTe多量子阱光双稳的主要非线性机理为激子的饱和吸收。

A Cd x Zn 1-x Te/ZnTe multiple quantum well (MQW) optical bistable device has been fabricated, and its optical bistability is investigated at room temperature. The result indicates that the threshold and contrast ratio for the optical bistability in Cd x Zn 1-x Te/ZnTe MQW optical bistable device are about 363 kW/cm 2 and 4:1, respectively. On the basis of the excitonic nonlinear theories, excitonic absorption spectrum in the Cd x Zn 1-x Te/ZnTe MQW, we attribute the major nonlinear mechanism for the optical bistability to the saturating effect of excitonic absorption.