Nontrivial band geometry in an optically active system

Jiahuan Ren, Qing Liao (), Feng Li (), Yiming Li, Olivier Bleu, Guillaume Malpuech, Jiannian Yao, Hongbing Fu () and Dmitry Solnyshkov ()
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Jiahuan Ren: Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University
Qing Liao: Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University
Feng Li: Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Xi’an Jiaotong University
Yiming Li: Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Xi’an Jiaotong University
Olivier Bleu: Institut Pascal, PHOTON-N2, Université Clermont Auvergne, CNRS, SIGMA Clermont
Guillaume Malpuech: Institut Pascal, PHOTON-N2, Université Clermont Auvergne, CNRS, SIGMA Clermont
Jiannian Yao: Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Sciences, Tianjin University, Collaborative Innovation Center of Chemical Science and Engineering
Hongbing Fu: Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University
Dmitry Solnyshkov: Institut Pascal, PHOTON-N2, Université Clermont Auvergne, CNRS, SIGMA Clermont

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract Optical activity, also called circular birefringence, is known for two hundred years, but its applications for topological photonics remain unexplored. Unlike the Faraday effect, the optical activity provokes rotation of the linear polarization of light without magnetic effects, thus preserving the time-reversal symmetry. In this work, we report a direct measurement of the Berry curvature and quantum metric of the photonic modes of a planar cavity, containing a birefringent organic microcrystal (perylene) and exhibiting emergent optical activity. This experiment, performed at room temperature and at visible wavelength, establishes the potential of organic materials for implementing non-magnetic and low-cost topological photonic devices.

Date: 2021
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DOI: 10.1038/s41467-020-20845-2

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