光子经过表面等离激元导波传输后的不可分辨性的保持。

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

机构信息

Institute of Quantum Science, Nihon University, Tokyo, Japan.

出版信息

Opt Lett. 2012 May 1;37(9):1535-7. doi: 10.1364/OL.37.001535.

DOI:10.1364/OL.37.001535

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.

摘要

我们通过模式转换，即光子到等离子体和等离子体到光子转换，实验证明了两个光子之间的不可分辨性得以保持。通过自发参量下转换过程产生的宽带光子对进行了双光子干涉实验。我们在包括 1mm 长的表面等离子体激元（SPP）波导的干涉仪中观察到了所谓的 Hong-Ou-Mandel 凹陷。在 SPP 波导中传播后，光子的不可分辨性保持在 92.4%。