Near-UV Background in Photonic Based pi'n/pin Amorphous SiC Sensors

摘要

In this paper, we present a wavelength selector based on a monolithic multilayer pi'n/pin a-SiC:H optical filter that requires appropriate near-ultraviolet steady states optical switches to select the desired wavelengths in the visible-near infrared (VIS-NIR) ranges. Results show that the background intensity works as a selector in the infrared/visible regions, shifting the sensor sensitivity. Low intensities select the NIR range while high intensities select the visible part. Here, the optical gain is very high in the red range, decreases in the green range, and stays near one in the blue region decreasing strongly in the near-ultraviolet range. The transfer characteristics effects due to changes in steady state light intensity and wavelength backgrounds are presented. The relationship between the optical inputs and the output signal is established when a multiplexed signal is analysed. An optoelectronic model gives insight into the physics of the selector.