Polarization sensitive photodectector based on GaAsN

TL;DR

This paper introduces a compact, room-temperature GaAsN-based circular polarimeter capable of electrically measuring light's polarization degree and intensity across various angles in a single measurement, integrating easily with standard electronics.

Contribution

It presents a novel GaAsN-based device that combines spin-dependent electron capture and hyperfine interactions to measure polarization and handedness without bulky components.

Findings

Numerical simulations demonstrate effective polarization sensitivity.

Device discriminates light handedness via hyperfine interaction.

Operates at room temperature across wide incidence angles.

Abstract

We propose and numerically simulate an optoelectronic compact circular polarimeter. It allows to electrically measure the degree of circular polarization and light intensity at room temperature for a wide range of incidence angles in a single shot. The device, being based on GaAsN, is easy to integrate into standard electronics and does not require bulky movable parts nor extra detectors. Its operation hinges mainly on two phenomena: the spin dependent capture of electrons and the hyperfine interaction between bound electrons and nuclei on Ga$^{2+}$ paramagnetic centers in GaAsN. The first phenomenon confers the device with sensitivity to the degree of circular polarization and the latter allows to discriminate the handedness of the incident light.