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Highly efficient generation of entangled photon pair by spontaneous parametric downconversion in defective photonic crystals
KTH, School of Biotechnology (BIO), Theoretical Chemistry.ORCID iD: 0000-0002-2442-1809
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2007 (English)In: Journal of the Optical Society of America. B, Optical physics, ISSN 0740-3224, Vol. 24, no 6, 1365-1368 p.Article in journal (Refereed) Published
Abstract [en]

We study the process of spontaneous parametric downconversion in a one-dimensional defective quadratic nonlinear photonic crystal. It is shown that the strong confinements of both the pump and signal waves around the defective layer result in a giant enhancement of the entangled photon-pair generation. An enhancement factor as high as 3.4 X 10(6) is obtained in our defective structure based on the dual-localized modes. Furthermore, the linewidth of the downconverted fields is only 0. 1 nm. Such a photonic crystal structure can be applied as a highly efficient source of entangled photon pairs for highly integrated all-optical circuits.

Place, publisher, year, edition, pages
2007. Vol. 24, no 6, 1365-1368 p.
Keyword [en]
2nd-harmonic generation, periodic structure
URN: urn:nbn:se:kth:diva-16664ISI: 000246867500016ScopusID: 2-s2.0-34347370497OAI: diva2:334707
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Fu, YingÅgren, Hans
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