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Wireless UV sensor based on photocapacitive effect in GaN
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Journal Article
Wireless UV sensor based on photocapacitive effect in GaN
2009
Overview
The LC oscillator with the interdigitated aluminium-on-GaN/sapphire photocapacitor has been demonstrated. Upon illumination with a 375 nm UV LED, an oscillator frequency downshift owing to the photocapacitive effect attains a 5.2 MHz (3.5 % of the dark frequency value 149 MHz) with sensitivity up to 170 kHz/(μW/cm2). The oscillator can be employed as a visible-blind UV sensor with a remote wireless pickup of the RF output signal.
Publisher
John Wiley & Sons, Inc
Subject
