Spin Selective Filtering of Polariton Condensate Flow

TL;DR

This paper demonstrates a method for spin-selective control of polariton condensate flow in a microcavity waveguide using a spin-dependent gating barrier, enabling precise manipulation of polariton spin currents.

Contribution

It introduces a controllable spin-dependent gating barrier for spatial filtering of polariton condensates, advancing spin-based control in polariton systems.

Findings

Successful spin-selective filtering of polariton flow.

Demonstration of spin-dependent gating using circularly polarized laser beams.

Complete control over polariton transmission by varying gate polarization.

Abstract

Spin-selective spatial filtering of propagating polariton condensates, using a controllable spin-dependent gating barrier, in a one-dimensional semiconductor microcavity ridge waveguide is reported. A nonresonant laser beam provides the source of propagating polaritons while a second circularly polarized weak beam imprints a spin dependent potential barrier, which gates the polariton flow and generates polariton spin currents. A complete spin-based control over the blocked and transmitted polaritons is obtained by varying the gate polarization.