All-optical and ultrafast control of high-order exciton-polariton orbital modes

TL;DR

This paper demonstrates room-temperature, all-optical, ultrafast control of high-order exciton-polariton orbital modes in perovskite microcavities, enabling potential advancements in high-bandwidth optical communication.

Contribution

It introduces a method to generate and control high-order OAM modes in exciton-polariton systems at room temperature using all-optical techniques.

Findings

Achieved stable high-order (up to 33) OAM modes in perovskite microcavities.

Controlled OAM tuning from 8 to 12 using an additional laser pulse.

Demonstrated ultrafast, all-optical manipulation of exciton-polariton orbital modes.

Abstract

Exciton-polaritons flows within closed quantum circuits can spontaneously form phase-locked modes that carry orbital angular momentum (OAM). With its infinite set of angular momentum quantum numbers, high-order OAM represents a transformative solution to the bandwidth bottleneck in multiplexed optical communication. However, its practical application is hindered by the limited choice of materials which in general requires cryogenic temperatures and the reliance on mechanical switching. In this work, we achieve stable and high-order (up to order of 33) OAM modes by constructing a closed quantum circuit using the halide perovskite microcavities at room temperature. By controlling the spatial and temporal symmetry of the closed quantum circuits using another laser pulse, we achieve significant tuning OAM of EP flows from 8 to 12. Our work demonstrate all-optical and ultrafast control of high-order OAM using exciton-polariton condensates in perovskite microcavities that would have important applications in high-throughput optical communications.