Room temperature, cascadable, all-optical polariton universal gates

Denis A. Sannikov, Anton V. Baranikov, Anton D. Putintsev, Mikhail Misko, Anton V. Zasedatelev, Ullrich Scherf and Pavlos G. Lagoudakis ()
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Denis A. Sannikov: Territory of Innovation Center Skolkovo
Anton V. Baranikov: Territory of Innovation Center Skolkovo
Anton D. Putintsev: Territory of Innovation Center Skolkovo
Mikhail Misko: Territory of Innovation Center Skolkovo
Anton V. Zasedatelev: Territory of Innovation Center Skolkovo
Ullrich Scherf: Bergische Universität Wuppertal
Pavlos G. Lagoudakis: Territory of Innovation Center Skolkovo

Nature Communications, 2024, vol. 15, issue 1, 1-7

Abstract: Abstract Today, almost all information processing is performed using electronic logic circuits operating at several gigahertz frequency. All-optical logic holds the promise to allow for up to three orders of magnitude higher speed. Whereas essential all-optical transistor functionalities were demonstrated across a range of platforms, utilising them to implement a complete Boolean logic gate set and in particular negation, i.e. switching off an optical signal with another, weaker, optical signal, poses a major challenge. Here, we realize a cascadable NOT gate by introducing the concept of non-ground-state polariton amplification in organic semiconductor microcavities under non-resonant optical excitation. We unravel the importance of vibron-mediated stimulated scattering in room temperature operation of the inverter. Moreover, we extend the concept to a multi-input universal NOR logic gate, where in the presence of any of the input signals non-ground-state amplification supersedes spontaneous ground-state condensation, resulting in a NOR gate with ~1 ps switching time. The realisation of an ultrafast universal logic gate constitutes an essential step for more complex optical circuitry that could boost information processing applications.

Date: 2024
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DOI: 10.1038/s41467-024-49690-3

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