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Conference on Lasers and Electro-Optics

Proposal for an on-Demand Source of Indistinguishable Single Photons from a Single Quantum Dot - Cavity System

Pradyumna K. Pathak, Stephen Hughes

Published Jan 1, 2010• 0 citations
Publisher

Abstract

We present a new scheme for the on-demand-generation of indistinguishable single-photons using adiabatic Raman passage through the Autler-Townes doublet, generated from a resonant field applied between the biexciton and exciton states in a quantum dot.
DOI
10.1364/qels.2010.jthe104

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A biexciton in a semiconductor quantum dot is a source of polarization-entangled photons with high potential for implementation in scalable systems. Several approaches for nonresonant, resonant, and quasiresonant biexciton preparation exist, but all have their own disadvantages; for instance, low fidelity, timing jitter, incoherence, or sensitivity to experimental parameters. We demonstrate a coherent and robust technique to generate a biexciton in an InGaAs quantum dot with a fidelity close to 1. The main concept is the application of rapid adiabatic passage to the ground-state--exciton--biexciton system. We reinforce our experimental results with simulations which include a microscopic coupling to phonons.
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