Year: 2024
Type: article
Abstract: We propose a concept of a superconducting (SC) photodiode—a device that transforms the energy and ‘spin’ of an external electromagnetic (EM) field into the rectified steady-state supercurrent and develop a microscopic theory describing its properties. For this, we consider a two-dimensional thin film cooled down below the temperature of SC transition with the injected dc supercurrent and exposed to an external EM field with a frequency smaller than the SC gap. As a result, we predict the emergence of a photoexcited quasiparticle current, and, as a consequence, oppositely oriented stationary flow of Cooper pairs. The strength and direction of this photoinduced supercurrent depend on (i) such material properties as the effective impurity scattering time and the nonequilibrium quasiparticles’ energy relaxation time and (ii) such EM field properties as its frequency and polarization.
Source: 2D Materials
Authors: A V Parafilo, M Sun, K Sonowal, V M Kovalev, I G Savenko
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Award: G1369937091
OpenAlex ID: W4404581720