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. 2024 Oct 24;14(21):1705. doi: 10.3390/nano14211705

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© 2024 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Schematic of all reflectors under circularly polarized light at normal incidence. (a) A general mirror reverses the handedness of circular polarized light in reflection. (b) An LCP absorber and (c) an RCP absorber can reflect circularly polarized light of one handedness with handedness variation, while absorbing the other handedness, as shown as the black circle. (d) An anisotropy mirror is designed as a half-wave plate with a phase difference of π, to preserve handedness without handedness variation. (e) An LCP mirror and (f) an RCP mirror can reflect circular polarized light of one handedness and preserve handedness without handedness variation, while absorbing the other handedness. (g) An isotropic mirror absorbs both LCP and RCP light and does not reflect light as a perfect absorber.