Nonlinear interactions with an ultrahigh flux of broadband entangled photons

We experimentally demonstrate sum-frequency generation with entangled photon pairs, generating as many as 40,000 photons per second, visible even to the naked eye. The nonclassical nature of the interaction is exhibited by a linear intensity dependence of the nonlinear process. The key element in ou...

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Bibliographic Details
Published inPhysical review letters Vol. 94; no. 4; p. 043602
Main Authors Dayan, Barak, Pe'er, Avi, Friesem, Asher A, Silberberg, Yaron
Format Journal Article
LanguageEnglish
Published United States 04.02.2005
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Summary:We experimentally demonstrate sum-frequency generation with entangled photon pairs, generating as many as 40,000 photons per second, visible even to the naked eye. The nonclassical nature of the interaction is exhibited by a linear intensity dependence of the nonlinear process. The key element in our scheme is the generation of an ultrahigh flux of entangled photons while maintaining their nonclassical properties. This is made possible by generating the down-converted photons as broadband as possible, orders of magnitude wider than the pump. This approach can be applied to other nonlinear interactions, and may become useful for various quantum-measurement tasks.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.94.043602