Preservation of photon indistinguishability after transmission through surface-plasmon-polariton waveguide

We experimentally demonstrated preservation of indistinguishability between two photons via mode conversions, namely, photon-to-plasmon and plasmon-to-photon conversions. A two-photon interference experiment was carried out using a broadband photon pair generated through a spontaneous parametric dow...

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Bibliographic Details
Published in:Optics letters 2012-05, Vol.37 (9), p.1535-1537
Main Authors: Fujii, Go, Segawa, Toshiya, Mori, Shigehiko, Namekata, Naoto, Fukuda, Daiji, Inoue, Shuichiro
Format: Article
Language:English
Subjects:
Broadband
Conversion
Dipping
Interferometers
Photons
Preservation
Wave propagation
Waveguides
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Summary:We experimentally demonstrated preservation of indistinguishability between two photons via mode conversions, namely, photon-to-plasmon and plasmon-to-photon conversions. A two-photon interference experiment was carried out using a broadband photon pair generated through a spontaneous parametric downconversion process. We observed the so-called Hong-Ou-Mandel dip with an interferometer including a 1-mm-long surface-plasmon-polariton (SPP) waveguide. The photon indistinguishability of 92.4% was retained after propagation in the SPP waveguide.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.37.001535