期刊
OPTICS LETTERS
卷 43, 期 5, 页码 963-966出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.43.000963
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资金
- RIKEN iTHES Project, MURI Center for Dynamic Magneto-Optics, Air Force Office of Scientific Research (AFOSR) [FA9550-14-1-0040]
- IMPACT program of JST, Japan Society for the Promotion of Science (JSPS) (KAKENHI)
- Core Research for Evolutional Science and Technology (CREST) [JPMJCR1676]
- John Templeton Foundation
- European Research Council (ERC) [ERC-2016-STG-714151-PSINFONI]
- Australian Research Council (ARC)
Nonreciprocity and one-way propagation of optical signals are crucial for modern nanophotonic technology, and typically achieved using magneto-optical effects requiring large magnetic biases. Here we suggest a fundamentally novel approach to achieve unidirectional propagation of surface plasmon-polaritons (SPPs) at metal-dielectric interfaces. We employ a direct electric current in metals, which produces a Doppler frequency shift of SPPs due to the uniform drift of electrons. This tilts the SPP dispersion, enabling one-way propagation, as well as zero and negative group velocities. The results are demonstrated for planar interfaces and cylindrical nanowire waveguides. (C) 2018 Optical Society of America
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