具有dog功能特性的电荷存储型光电传感器

IEEE Sensors, 2005. Pub Date : 2005-10-31 DOI:10.1109/ICSENS.2005.1597839

Y. Matsui, Y. Miyoshi

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引用次数: 1

摘要

研制成功了具有DOG(高斯差分)函数特征的光电传感器，并将其应用于人工视觉皮层。利用InAs/GaAs短周期超晶格(SSL)电荷存储层的GaAs/GaAlAs多量子阱(MQW)结构获得了显著的负光感应电流(PIC)和负差分(ND)特性。这些特性取决于电荷存储层的晶体质量，与InGaAs合金相比，使用InAs/GaAs SSL大大增强了这些特性。此外，我们还设计了一个光电传感电路来模拟人类视觉皮层对狭缝光的方向、运动方向和长度的选择性机制

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Charge-storage-type optoelectronic sensor with DOG-function characteristics

The optoelectronic sensors with DOG (difference of Gaussian)-function characteristics have been developed successfully for the application to the artificial visual cortex. The remarkable negative photoinduced current (PIC) and negative differential (ND) characteristics according to the forward bias voltage have been obtained for GaAs/GaAlAs multi-quantum well (MQW) structures with a charge-storage layer of InAs/GaAs short period superlattice (SSL). The characteristics are dependent on the crystal quality of the charge-storage layer and extremely enhanced by using the InAs/GaAs SSL compared with InGaAs alloy. In addition, we have designed an optoelectronic sensing circuit to mimic the mechanism of the selectivity to orientation, motion-direction and length of slit light in a human visual cortex

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IEEE Sensors, 2005.

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