Control and ultrafast dynamics of a two-fluid polariton switch

TL;DR

This paper demonstrates control over a two-fluid polariton system's hysteresis and switching thresholds using a second fluid, and achieves ultrafast population control with external laser pulses in under a few picoseconds.

Contribution

It introduces a method to control polariton fluid interactions and ultrafast switching dynamics using dual laser pumping, advancing polariton-based optoelectronic device capabilities.

Findings

Hysteresis cycles and ON/OFF thresholds are controllable via a second polariton fluid.

Ultrafast switching of polariton states is achievable in less than a few picoseconds.

External laser pulses can precisely control polariton populations.

Abstract

We investigate the cross-interactions in a two-component polariton quantum fluid coherently driven by two independent pumping lasers tuned at different energies and momenta. We show that both the hysteresis cycles and the ON/OFF threshold of one polariton signal can be entirely controlled by a second polariton fluid. Furthermore, we study the ultrafast switching dynamics of a driven polariton state, demonstrating the ability to control the polariton population with an external laser pulse, in less than a few picoseconds.