期刊
NANO LETTERS
卷 15, 期 4, 页码 2380-2384出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl504636x
关键词
Surface plasmon polaritons; quantum entanglement; silver nanowire
类别
资金
- NBRP [2011CBA00200, 2011CB921200]
- Strategic Priority Research Program(B) of the Chinese Academy of Sciences [XDB01030200]
- NNSF [11374289]
- Fundamental Research Funds for the Central Universities [WK2470000012]
- NCET
Photonic quantum technologies have been extensively studied in quantum information science, owing to the high-speed transmission and outstanding low-noise properties of photons. However, applications based on photonic entanglement are restricted due to the diffraction limit. In this work, we demonstrate for the first time the maintaining of quantum polarization entanglement in a nanoscale hybrid plasmonic waveguide composed of a fiber taper and a silver nanowire. The transmitted state throughout the waveguide has a fidelity of 0.932 with the maximally polarization entangled state Phi(+). Furthermore, the Clauser, Horne, Shimony, and Holt (CHSH) inequality test performed, resulting in value of 2.495 +/- 0.147 > 2, demonstrates the violation of the hidden variable model. Because the plasmonic waveguide confines the effective mode area to subwavelength scale, it can bridge nanophotonics and quantum optics and may be used as near-field quantum probe in a quantum near-field micro/nanoscope, which can realize high spatial resolution, ultrasensitive, fiber-integrated, and plasmon-enhanced detection.
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