Dresden 2020 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 71: Focus Session: Tailored Nonlinear Photonics II

HL 71.6: Talk

Thursday, March 19, 2020, 16:45–17:00, POT 51

Acoustically induced bistability switching and memory effect in confined exciton-polariton condensates — •Alexander Kuznetsov, Klaus Biermann, and Paulo Santos — Paul-Drude-Institut für Festkörperelektronik, Berlin, Germany

Bistability is a remarkable and useful property of nonlinear exciton-polariton (EP) quasiparticles. In this work, we demonstrate the switching of trapped EPs between bistable states by 0.4 GHz acoustic strain pulses. A microsecond-long strain pulse, piezoelectrically generated on-demand, triggers the bosonic stimulation (Bose-Einstein-like condensation) from an initial state below the condensation threshold to the final state above the threshold, i.e., the bistability switching. The system remains in this final state for as long as the optical pump is supplied (recorded time up to 15 minutes). Thus, the reported effect is a novel concept for an on-chip optical memory with electro-acoustic triggering based on confined EP condensates.