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Observation of Nonvanishing Optical Helicity in Thermal Radiation from Symmetry-Broken Metasurfaces

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Abstract

We experimentally demonstrate magnetic-field-free circular-polarized thermal radiation based on a symmetry-broken metasurface. A nonvanishing optical helicity in the radiation excited by thermal fluctuations is observed in a dispersionless energy band.

© 2022 The Author(s)

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