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Nonreciprocal metamaterial obeying time-reversal symmetry

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arxiv 2002.00341 v1 pith:IX6FOPSB submitted 2020-02-02 physics.optics

classification physics.optics
keywords classsymmetrysystemstime-reversalachievingamplificationbreakcompact
verification ladder T0 review T1 audit T2 compute T3 formal
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We introduce a class of non-Hermitian systems that break electromagnetic reciprocity while preserving time-reversal symmetry, and describe its novel polarization dynamics. We show that this class of systems can be realized using van der Waals heterostructures involving transition-metal dichalcogenides (TMDs). Our work provides a path towards achieving strong optical nonreciprocity and polarization-dependent directional amplification using compact, large-area and magnet-free structures.

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