Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optical isolation with epsilon-near-zero metamaterials   We suggest a principle for isolation of circularly polarized waves in
magnetically active extreme-parameter metamaterials. Using theoretical analysis
and numerical simulations, we show that metamaterials with extreme parameters,
such as epsilon-near-zero materials (ENZ), when merged with magneto-optical
materials, become transparent for forward circularly polarized waves of a given
handedness and opaque for backward propagating waves of the same handedness. We
theoretically study two possible implementations of such hybrid materials: (1)
the case of metal-dielectric stacks; and (2) rectangular waveguide near its
cut-off frequency. We prove that these structures can be utilized as compact
isolators for circularly polarized waves.

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The categories of this paper are: q-bio
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The categories of this paper are: chem-ph
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: gr-qc
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-th