Operation speed of polariton condensate switches gated by excitons

Abstract

We present a time-resolved photoluminescence (PL) study in real- and momentum-space of a polariton condensate switch in a quasi-1D semiconductor microcavity. The polariton flow across the ridge is gated by excitons inducing a barrier potential due to repulsive interactions. A study of the device operation dependence on the power of the pulsed gate beam obtains a satisfactory compromise for the ON/OFF-signal ratio and -switching time of the order of 0.3 and $\sim 50$ ps, respectively. The opposite transition is governed by the long-lived gate excitons, consequently the OFF/ON-switching time is $\sim 200$ ps, limiting the overall operation speed of the device to $\sim 3$ GHz. The experimental results are compared to numerical simulations based on a generalized Gross-Pitaevskii equation, taking into account incoherent pumping, decay and energy relaxation within the condensate.

arXiv comment11 pages, 11 figures

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• Optical control of spin textures in quasi-one-dimensional polariton condensates
• Realization of Hofstadter's butterfly and a one-way edge mode in a polaritonic system
• Experimental realization of a polariton beam amplifier
• Coupled exciton-photon Bose condensate in path integral formalism
• Counter-directional polariton coupler
• Polaritonic linear dynamic in Keldysh formalism
• On the remote coherence of polariton condensates in 1D microcavities: a photoluminescence study
• Coupling Dynamics and Linear Polarization Phenomena in Codirectional Polariton Waveguide Couplers
• Optical resonators constitute a universal spin simulator