<p>A nonreciprocal heat emitter consisting of a periodically arrayed Weyl semimetal(WSM) and silicon grating placed on a metal reflector is proposed and investigated. Numerical results show that strong nonreciprocal radiation is achieved at a certain angle. Calculating the magnetic field distribution at the resonance frequency can explain the physical mechanism. In addition, the strong nonreciprocal radiation at other angles is investigated to provide a variety of choices for practical applications. Finally, the nonreciprocal absorption was adjusted by modifying the geometrical parameters of the structure.</p>

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Nonreciprocal thermal radiation in silicon grating composing of Weyl semimetal layer

  • Xin Chen,
  • Guanxia Yu

摘要

A nonreciprocal heat emitter consisting of a periodically arrayed Weyl semimetal(WSM) and silicon grating placed on a metal reflector is proposed and investigated. Numerical results show that strong nonreciprocal radiation is achieved at a certain angle. Calculating the magnetic field distribution at the resonance frequency can explain the physical mechanism. In addition, the strong nonreciprocal radiation at other angles is investigated to provide a variety of choices for practical applications. Finally, the nonreciprocal absorption was adjusted by modifying the geometrical parameters of the structure.