Polarization dependent non-Hermitian atomic grating controlled by dipole blockade effect

TL;DR

This paper presents a theoretical scheme for a polarization-dependent non-Hermitian atomic grating in ultra-cold rubidium-87 atoms, controllable via Rydberg interactions and optical modulation, enabling asymmetric optical scattering applications.

Contribution

It introduces a novel polarization-dependent non-Hermitian atomic grating controlled by Rydberg blockade, with tunable diffraction modes and no crosstalk, advancing asymmetric optical device development.

Findings

Multiple polarization-dependent diffraction modes generated.

Diffraction modes switchable via optical pulse trains.

Modes tunable by non-Hermitian optical modulation.

Abstract

We propose a theoretical scheme for a non-Hermitian atomic grating within an ultra-cold rubidium-87 ($^{87}Rb$) atomic ensemble. The grating's diffraction properties depend on the polarization states of incident photons and are controlled non-locally through Rydberg interactions. Multiple types of polarization-dependent diffraction modes are generated, benefiting from no crosstalk atomic transition channels based on transition selection rules. Those polarization-dependent diffraction modes can be switched using dynamic optical pulse trains, exploiting the Rydberg blockade effect, and are tunable by non-Hermitian optical modulation. Our work will advance the application of asymmetric optical scattering by utilizing the polarization degree of freedom within continuous media and benefit the application of versatile non-Hermitian/asymmetric optical devices.