Work

Polarization-Sensitive Photodetector Based on GaAs1−xNx

Year: 2021

Type: article

Abstract: We propose and numerically simulate an optoelectronic compact circular polarimeter. It allows for electrical measurement of 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 ${\mathrm{Ga}\mathrm{As}}_{1\ensuremath{-}x}{\mathrm{N}}_{x}$, 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 ${\mathrm{Ga}}^{2+}$ paramagnetic centers in ${\mathrm{Ga}\mathrm{As}}_{1\ensuremath{-}x}{\mathrm{N}}_{x}$. The first phenomenon confers the device with sensitivity to the degree of circular polarization and the latter phenomenon allows one to discriminate the handedness of the incident light.

Source: Physical Review Applied

DOI: 10.1103/physrevapplied.15.064040