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It has been shown that a reversed biased multiple-quantum-well (MQW) PIN diode can function as a logic switching device, the self-electrooptic device (SEED).1 The general principle of this SEED operation is that the photocurrent generated by light absorbed in the diode may change the voltage across it, which in turn causes a change in the absorption of light in the diode. By connecting the diode to a proper load and tuning the light wavelength to coincide with the heavy hole hh exciton, a positive feedback is achieved leading to switching and bistable behavior.
© 1988 Optical Society of America
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