Research on silicon avalanche photodetector with wideband response
Based on the current application requirements for wideband response photodetectors,we designed a novel silicon avalanche photodetector(Si APD)with high response in a broad spectral range of 250-1 100 nm and it could achieve efficient detection of ultraviolet,visible and near-infrared light without splicing.The enhancement of silicon on ultraviolet and infrared bands was separately analyzed.This was followed by simulation on the device structure de-signs using different methods such as back incidence,to improve short wavelength absorption while maintaining a high infrared absorption.The Si APD shows a peak wavelength at around 940 nm and a high photoresponse at 250 nm and 1 100 nm which exceeds 15%of the peak responsivity.This type of device is suitable for multispectral applications and future high-precision detection.