期刊
NATURE COMMUNICATIONS
卷 5, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms4226
关键词
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资金
- EPSRC (UK)
- ERC iPLASMM project [321268]
- Ministry of Education and Science of Russian Federation [11.G34.31.0020, 14.B37.21.1941]
- Dynasty Foundation (Russia)
- Russian Foundation for Basic Research (RFBR)
- Scholarship of the President of Russian Federation
- Australian Research Council (CUDOS Centre of Excellence) [CE110001018]
- Spanish MICINN under contracts CON-SOLIDER [EMETCSD2008-00066, TEC2011-28664-C02-02]
- EC Projects POLAPHEN and SPANGL4Q
- EPSRC [EP/K007793/1, EP/H000917/2] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/H000917/2, EP/K007793/1] Funding Source: researchfish
The routing of light in a deep subwavelength regime enables a variety of important applications in photonics, quantum information technologies, imaging and biosensing. Here we describe and experimentally demonstrate the selective excitation of spatially confined, subwavelength electromagnetic modes in anisotropic metamaterials with hyperbolic dispersion. A localized, circularly polarized emitter placed at the boundary of a hyperbolic metamaterial is shown to excite extraordinary waves propagating in a prescribed direction controlled by the polarization handedness. Thus, a metamaterial slab acts as an extremely broadband, nearly ideal polarization beam splitter for circularly polarized light. We perform a proof of concept experiment with a uniaxial hyperbolic metamaterial at radio-frequencies revealing the directional routing effect and strong subwavelength lambda/300 confinement. The proposed concept of metamaterial-based subwavelength interconnection and polarization-controlled signal routing is based on the photonic spin Hall effect and may serve as an ultimate platform for either conventional or quantum electromagnetic signal processing.
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