Variable-Sensitivity Photodetector of pn-np Structure for Optical Neural Networks
- 1 January 1994
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 33 (1B) , L113
- https://doi.org/10.1143/jjap.33.l113
Abstract
A new structure of the variable-sensitivity photodetector (VSPD) is proposed. It is based on an interdigital pn-np structure. Analog and bipolar photosensitivities varied by the control voltage are described, and the photocurrent is compared with those of the metal-semiconductor-metal (MSM)-type VSPD. Introduction of the pn-np structure is effective for obtaining high photodetection efficiency, and also for modifying the variable-sensitivity characteristics. These advantages make it attractive for optical implementation of neural networks.Keywords
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