Electromagnetic Radiation Detectors with Lattice-Matched Epitaxial Anti-Reflection Structures

An electromagnetic radiation detectors includes anti-reflective epitaxial structures incorporated into an epitaxial stack of the electromagnetic radiation detector. An anti-reflective structures as described herein are grown between (and thereby connect) two lattice-matched epitaxial layers that have different refractive indices. The anti-reflective structure reduces Fresnel reflections that would otherwise occur if the two epitaxial layers were directly connected.