Abstract
We are constructing a theory of electromagnetic field-induced transport in two-dimensional (2D) superconducting thin films and monolayers at low and finite temperatures. This theory demonstrates that the frequency and polarization of an external electromagnetic field can control the current of Cooper pairs, enabling the generation of both longitudinal and transverse (Hall) currents of Cooper pairs. Light absorption of a uniform electromagnetic field with a frequency larger than the superconducting gap is forbidden in pure superconductors. Finite absorption can occur only if electron scattering by impurities is taken into account.
We are constructing a theory of the nonlinear response of isotropic 2D superconductors in the presence of a built-in constant supercurrent at various frequencies and temperatures. This research aligns with recent studies on the superconducting diode effect. We also propose the optical diode (photodiode), which (i) allows for optical control of the signal propagation in the system and (ii) is magnetic field-free, as opposed to the superconducting diode, where the magnetic field is necessary.
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