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Conference on Lasers and Electro-Optics

A solid-state single photon filter

Lorenzo De Santis, C. Antón, B. Reznychenkov, Niccolò Somaschi, G. Coppola, Aristide Lemaître, Isabelle Sagnes, Andrew G. White, L. Lanco, Alexia Auffèves, P. Senellart

Published Jan 1, 2018• 3 citations
Publisher

Abstract

A single semiconductor quantum dot in a microcavity is shown to filter single photon Fock states. The device presents non-linearity threshold of 0.3 photons and strongly suppresses the multiphoton components of an incident coherent beam.
DOI
10.1364/cleo_qels.2018.ftu3h.7

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A single two-level system constitutes an extremely non-linear optical medium, where the interaction with a first single photon modifies the transmission probability for a second photon. The main difficulty to implement a single photon switch using this property is to ensure that a gate single photon will interact with the quantum emitter with a near-unity probability. In the solid state, all-optical switching has been demonstrated using photonic crystals or microdisks coupled to quantum dots, but these systems were not well externally matched: hundreds of incident photons were thus required to trigger the optical nonlinearity.