Polaritonic devices

Introduction

Exciton-polaritons (polaritons) are superpositions of photons in a Fabry-Pérot microcavity and confined excitons in 2-dimensional quantum wells. They are very light (100,000 times lighter than electrons) and very fast (>100 GHz) thanks to their photonic component, but they can also strongly interact with each other due to their excitonic part. Polaritons can form macroscopic quantum states like atomic Bose-Einstein condensates, and using organic materials they can condense at room temperature. In certain conditions, polariton condensates can spontaneously acquire macroscopic spins of up or down. In this project we aim to exploit them to make ultrafast optoelectronic switches and true random number generators on a chip that can be integrated into the next generation of CPUs and telecommunications.

Aims

Our aim is to build ultra-highspeed (50 GHz) room-temperature opto-electronic chips based on our recent demonstration of spontaneously magnetised polariton condensates [1,2]. We are aiming to fabricate electrically contacted organic-based polariton microcavities in close collaboration with Prof. Turnbull and Prof. Samuel’s group, and study the condensation and specifically their spin properties.

Interested to work on this project?

Send your CV and cover letter to Dr Ohadi.