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- W4387444037 abstract "For optoelectronic devices that convert optical signal to electrical signal, they can have a fast photoresponse speed to function as a photodetector, or possess the ability to perceive, memorize and process images to act as a neuromorphic vision sensor (NVS). However, the simultaneous implementation of photodetector and NVS on a single device faces a great challenge, due to the contradiction of photoresponse speed. In this work, to simultaneous achieve this complex function in a single device, trench-bridged GaN/Ga2 O3 /GaN back-to-back double heterojunction array device is fabricated. Interestingly, the device shows fast photoresponse and persistent photoconductivity behavior at low and high voltages, respectively, through the modulation of oxygen vacancy ionization and de-ionization processes in Ga2 O3 . Consequently, the role of the optoelectronic device can be altered between photodetector and NVS by simply adjusting the bias voltage. As a photodetector, the device is able to realize fast optical imaging and optical communication functions. On the other hand, the device exhibits outstanding image sensing, image memory, and neuromorphic visual pre-processing as a NVS. The utilization of NVS for image pre-processing leads to a noticeable enhancement in both the recognition accuracy and efficiency. The results presented in this work not only offer a new avenue to obtain complex functionality on a single optoelectronic device, but also provide the opportunities to implement advanced robotic vision systems and neuromorphic computing. This article is protected by copyright. All rights reserved." @default.
- W4387444037 created "2023-10-10" @default.
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- W4387444037 date "2023-10-09" @default.
- W4387444037 modified "2023-10-11" @default.
- W4387444037 title "Dual‐mode Conversion of Photodetector And Neuromorphic Vision Sensor via Bias Voltage Regulation on A Single Device" @default.
- W4387444037 doi "https://doi.org/10.1002/adma.202308090" @default.
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