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Frontiers in Optics

Cavity QED, Single-Photon Nonlinear Optics and Quantum Information Processing with Quantum Dots in Photonic Crystals

Jelena Vuckovic A, Andrei Faraon, Ilya Fushman, Dirk Englund

Published Jan 1, 2008• 0 citations
Publisher

Abstract

We have performed coherent probing of a strongly coupled quantum dot-photonic crystal cavity system, and employed this platform to demonstrate effects including controlled phase shift at the single photon level and photon blockade.
DOI
10.1364/fio.2008.ftub1

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We coherently probe a quantum dot that is strongly coupled to a photonic crystal nano-cavity by scattering of a resonant laser beam. The coupled system's response is highly nonlinear as the quantum dot saturates with nearly one photon per cavity lifetime. This system enables large amplitude and phase shifts of a signal beam via a control beam, both at single photon levels. We demonstrate photon-photon interactions with short pulses in a system that is promising for ultra-low power switches and two-qubit quantum gates.