Topological Optical Chirality Dichroism

• URL: http://arxiv.org/abs/2603.28752v1
• Date: Mon, 30 Mar 2026 17:55:38 GMT
• Title: Topological Optical Chirality Dichroism
• Abstract summary: We show that chiral topological invariants result in integer-quantized dichroic excitation rate differences.<n>We propose an experimental setup that leverages superchiral light as a smoking-gun probe of chiral band topologies in three-dimensional materials.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We report on a universal topological dichroism of chiral three-dimensional systems in response to the chirality of light. We show that chiral topological invariants result in integer-quantized dichroic excitation rate differences. Moreover, we demonstrate that such topological effects arise more generally from coupling optical chirality to higher tensor Berry curvatures and Dixmier-Douady invariants of quantum states, including Hopf indices. We finally propose an experimental setup that leverages superchiral light as a smoking-gun probe of chiral band topologies in three-dimensional materials. Our findings establish an optical route for probing to date unobserved chiral electronic band topologies.

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