Al$_{\bf 0.52}$In$_{\bf 0.48}$P SAM-APD as a Blue-Green Detector

We demonstrate an Al
_0.52
In
_0.48
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 <; 8 nA 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.