Journal
NATURE COMMUNICATIONS
Volume 7, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms12435
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Funding
- ERC Consolidator Grant (Topological)
- EPSRC [EP/J018473/1]
- Leverhulme Trust [RPG-2012-674]
- Opened Fund of the State Key Laboratory on Integrated Optoelectronics [IOSKL2014KF12]
- National Natural Science Foundation of China [51320105009, 91423101]
- Royal Society
- EPSRC [EP/J018473/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J018473/1] Funding Source: researchfish
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Weyl particles are elusive relativistic fermionic particles with vanishing mass. While not having been found as an elementary particle, they are found to emerge in solid-state materials where three-dimensional bands develop a topologically protected point-like crossing, a so-called Weyl point. Photonic Weyl points have been recently realised in three-dimensional photonic crystals with complex structures. Here we report the presence of a novel type of plasmonic Weyl points in a naturally existing medium-magnetized plasma, in which Weyl points arise as crossings between purely longitudinal plasma modes and transverse helical propagating modes. These photonic Weyl points are right at the critical transition between a Weyl point with the traditional closed finite equifrequency surfaces and the newly proposed 'type II' Weyl points with open equifrequency surfaces. Striking observable features of plasmon Weyl points include a half k-plane chirality manifested in electromagnetic reflection. Our study introduces Weyl physics into homogeneous photonic media, which could pave way for realizing new topological photonic devices.
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