Integrated AlGaAs source of highly indistinguishable and energy-time entangled photons
Year: 2016
Authors: Autebert C., Bruno N., Martin A., Lemaitre A., Carbonell C.G., Favero I., Leo G., Zbinden H., Ducci S.
Autors Affiliation: Univ Paris Diderot, Lab Mat & Phenomenes Quant, Sorbonne Paris Cite, CNRS,UMR 7162, Case Courrier 7021, F-75205 Paris 13, France; Univ Geneva, Appl Phys Grp, Geneva, Switzerland; CNRS, Lab Photon & Nanostruct, UPR20, Route Nozay, F-91460 Marcoussis, France.
Abstract: The generation of nonclassical states of light in miniature chips is a crucial step toward practical implementations of future quantum technologies. Semiconductor materials are ideal for achieving extremely compact and massively parallel systems and several platforms are currently under development. In this context, spontaneous parametric downconversion in AlGaAs devices combines the advantages of room temperature operation, possibility of electrical injection, and emission in the telecom band. Here we report on a chip-based AlGaAs source, producing indistinguishable and energy-time entangled photons with a brightness of 7.2 x 10(6) pairs/.s and a signal-to-noise ratio of 141 +/- 12. Indistinguishability between the photons is demonstrated via a Hong-Ou-Mandel experiment with a visibility of 89 +/- 3%, mainly limited by the reflectivity of the chip facets, while energy-time entanglement is tested via a Franson interferometer leading to a visibility of 96 +/- 4.
Journal/Review: OPTICA
Volume: 3 (2) Pages from: 143 to: 146
More Information: Agence Nationale de la Recherche (ANR-14-CE26-0029-01); Direction Generale de l’Armement (DGA); French RENATECH; Institut Universitaire de France; Region Ile-de-France in the framework of DIM Nano-K; Swiss National Science Foundation NCCR-QSIT.KeyWords: 2-photon Interference; Wave-guide; Quantum; GenerationDOI: 10.1364/OPTICA.3.000143Citations: 50data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-20References taken from IsiWeb of Knowledge: (subscribers only)