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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 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.

SUBMITTER: Laudenbach F 

PROVIDER: S-EPMC5543183 | biostudies-other | 2017 Aug

REPOSITORIES: biostudies-other

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