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Conference on Lasers and Electro-Optics

A robust all-solid-state source for single photons

Patrick Zarda, S. Mayer, Christian Kurtsiefer, H. Weinfurtet

Published Aug 29, 2005• 2 citations
Publisher

Abstract

Summary form only given. Summary from only given. The controlled generation of single photons is mandatory for new applications of quantum communication, in particular for truly secure quantum cryptography. Various solutions based on the fluorescence of single atom, ions or organic molecules have been demonstrated already. However, they are either rather difficult to perform, need expensive equipment or can generate only a very limited number of emissions. Here, we present an all-solid-state solution promising low costs and unprecedented stability.

DOI
10.1109/iqec.2000.907965

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Summary form only given. Summary from only given. The controlled generation of single photons is mandatory for new applications of quantum communication, in particular for truly secure quantum cryptography. Various solutions based on the fluorescence of single atom, ions or organic molecules have been demonstrated already. However, they are either rather difficult to perform, need expensive equipment or can generate only a very limited number of emissions. Here, we present an all-solid-state solution promising low costs and unprecedented stability.
Quantum non-Gaussianity (QNG) corresponds to an essential resource in many prospective applications of quantum technologies. QNG states of light have been demonstrated in a broad range of experimental platforms with various complementary advantages [1]. However, in order to allow for their direct and efficient utilization for interaction with the target quantum system, their degrees of freedom have to be well-defined and controllable. This imposes a requirement on the generation of QNG light in a single optical mode. While the intrinsic single-photon sources including trapped ions, atoms, or molecules, naturally offer a close-to a single mode emission, their technologically more accessible counterparts including majority of the solid-state emitters and sources based on heralded generation of nonclassical states in various parametric nonlinear processes typically provide a multi-mode output. Although several demonstrations of a single-mode operation of nonclassical light sources based on these platforms have been recently demonstrated, an unambiguous observation of a single-mode QNG light has never been presented.
Due to their quantum nature, single-photon emitters (SPE) generate individual photons in bursts or streams. They are paramount in emerging quantum technologies such as quantum key distribution, quantum repeaters, and measurement-based quantum computing. Many such systems have been reported in the last three decades, from rubidium atoms coupled to cavities to semiconductor quantum dots and color centers implanted in waveguides. This review article highlights different solid-state and atomic systems with on-demand and controlled single-photon generation. We discuss and compare the performance metrics, such as purity and indistinguishability, for these sources and evaluate their potential for different applications. Finally, a new potential single-photon source, based on the Rydberg exciton in solid-state metal oxide thin films, is introduced, where we discuss its promising features and unique advantages in fabricating quantum chips for quantum photonic applications.