Optically and electrically controlled polariton spin transistor

TL;DR

This paper introduces two innovative optically and electrically controlled polariton spin transistors, utilizing one-dimensional polariton channels and a 2D trap to manipulate polarization for spintronic applications.

Contribution

It presents novel schemes for a polariton-based spin transistor, combining optical and electrical control mechanisms in a new device architecture.

Findings

Polariton channels can mimic ferromagnetic contacts.

Polarization rotation can be controlled optically via a condensate.

Electrical control is achieved through exciton polarization splitting.

Abstract

We propose two schemes of a novel spin-optronic device, optical analog of Datta and Das spin transistor for the electrons. The role of ferromagnetic contacts is played by one-dimensional polariton channels with strong TE-TM splitting. A symmetric 2D trap plays a role of the non-magnetic active region. The rotation of the polarization of the pulse in this region can be achieved either due to its interaction with a spatially confined polariton condensate created resonantly by a circular polarized laser, either due to the splitting between the two linear polarizations of the excitons, controlled electrically by use of metallic gate.