Al<inline-formula><tex-math>$_{\bf 0.52}$</tex-math></inline-formula>In<inline-formula><tex-math>$_{\bf 0.48}$</tex-math></inline-formula>P SAM-APD as a Blue-Green Detector

Abstract

We demonstrate an ${\rm Al}_{0.52}{\rm In}_{0.48}{\rm P}$ homo-junction Separate Absorption Multiplication Avalanche Photodiode as a detector with narrow spectral response in the blue-green part of the optical spectrum. Due to its wide band-gap, this device has a dark current density of ${\rm cm}^{-2}$ at 99.9% of the breakdown voltage at room temperature. This device has a peak responsivity at 483 nm of 0.15 A/W when punched-through and is capable of an avalanche gain higher than 100.