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. 2023 Jan 27;9(4):eade4203. doi: 10.1126/sciadv.ade4203

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Copyright © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 4. — (A to I) The optical images (left; scale bar, 5 μm), averaged emissivity spectra (middle), and DoCP (right) are plotted for devices with mirror symmetry (A to C), inversion symmetry (D to F), and fourfold rotational symmetry (G to I), respectively. The average emissivity is symmetric along k = 0 in all three cases, which is a manifestation of the reciprocity. The DoCP is zero for the mirror-symmetric device and symmetric for the inversion and C4 devices. The results demonstrate that the intertwined spectral and spin properties of thermal radiation can be effectively tailored through symmetry engineering.