A novel single-crystal & single-pass source for polarisation- and colour-entangled photon pairs

Abstract We demonstrate a new generation mechanism for polarisation- and colour-entangled photon pairs. In our approach we tailor the phase-matching of a periodically poled KTP crystal such that two downconversion processes take place simultaneously. Relying on this effect, our source emits entangle...

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Main Authors: Fabian Laudenbach, Sebastian Kalista, Michael Hentschel, Philip Walther, Hannes Hübel
Format: Article
Language:English
Published: Nature Publishing Group 2017-08-01
Series:Scientific Reports
Online Access:https://doi.org/10.1038/s41598-017-07781-w
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spelling doaj-1fd452d3baf442bdb3aba1b69a1ff7f02020-12-08T01:03:51ZengNature Publishing GroupScientific Reports2045-23222017-08-01711910.1038/s41598-017-07781-wA novel single-crystal & single-pass source for polarisation- and colour-entangled photon pairsFabian Laudenbach0Sebastian Kalista1Michael Hentschel2Philip Walther3Hannes Hübel4Security & Communication Technologies, Center for Digital Safety & Security, AIT Austrian Institute of Technology GmbHSecurity & Communication Technologies, Center for Digital Safety & Security, AIT Austrian Institute of Technology GmbHSecurity & Communication Technologies, Center for Digital Safety & Security, AIT Austrian Institute of Technology GmbHQuantum Optics, Quantum Nanophysics & Quantum Information, Faculty of Physics, University of ViennaSecurity & Communication Technologies, Center for Digital Safety & Security, AIT Austrian Institute of Technology GmbHAbstract We demonstrate a new generation mechanism for polarisation- and colour-entangled photon pairs. In our approach we tailor the phase-matching of a periodically poled KTP crystal such that two downconversion processes take place simultaneously. Relying on this effect, our source emits entangled bipartite photon states, emerging intrinsically from a single, unidirectionally pumped crystal with uniform poling period. Its property of being maximally compact and luminous at the same time makes our source unique compared to existing photon-entanglement sources and is therefore of high practical significance in quantum information experiments.https://doi.org/10.1038/s41598-017-07781-w
collection DOAJ
language English
format Article
sources DOAJ
author Fabian Laudenbach
Sebastian Kalista
Michael Hentschel
Philip Walther
Hannes Hübel
spellingShingle Fabian Laudenbach
Sebastian Kalista
Michael Hentschel
Philip Walther
Hannes Hübel
A novel single-crystal & single-pass source for polarisation- and colour-entangled photon pairs
Scientific Reports
author_facet Fabian Laudenbach
Sebastian Kalista
Michael Hentschel
Philip Walther
Hannes Hübel
author_sort Fabian Laudenbach
title A novel single-crystal & single-pass source for polarisation- and colour-entangled photon pairs
title_short A novel single-crystal & single-pass source for polarisation- and colour-entangled photon pairs
title_full A novel single-crystal & single-pass source for polarisation- and colour-entangled photon pairs
title_fullStr A novel single-crystal & single-pass source for polarisation- and colour-entangled photon pairs
title_full_unstemmed A novel single-crystal & single-pass source for polarisation- and colour-entangled photon pairs
title_sort novel single-crystal & single-pass source for polarisation- and colour-entangled photon pairs
publisher Nature Publishing Group
series Scientific Reports
issn 2045-2322
publishDate 2017-08-01
description Abstract We demonstrate a new generation mechanism for polarisation- and colour-entangled photon pairs. In our approach we tailor the phase-matching of a periodically poled KTP crystal such that two downconversion processes take place simultaneously. Relying on this effect, our source emits entangled bipartite photon states, emerging intrinsically from a single, unidirectionally pumped crystal with uniform poling period. Its property of being maximally compact and luminous at the same time makes our source unique compared to existing photon-entanglement sources and is therefore of high practical significance in quantum information experiments.
url https://doi.org/10.1038/s41598-017-07781-w
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