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Updated: May 22, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Preservation of photon indistinguishability after transmission through surface-plasmon-polariton waveguide
Go Fujii1, Toshiya Segawa, Shigehiko Mori
1Institute of Quantum Science, Nihon University, Tokyo, Japan. go-fujii@aist.go.jp
Abstract:
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.

