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Updated: Jul 4, 2026

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
Observation of extraordinary optical activity in planar chiral photonic crystals
Kuniaki Konishi1, Benfeng Bai, Xiangfeng Meng
1Department of Applied Physics, University of Tokyo, Core Research for Evolutional Science and Technology, JST, Tokyo, Japan.
Abstract:
Control of light polarization is a key technology in modern photonics including application to optical manipulation of quantum information. The requisite is to obtain large rotation in isotropic media with small loss. We report on extraordinary optical activity in a planar dielectric on-waveguide photonic crystal structure, which has no in-plane birefringence and shows polarization rotation of more than 25 degrees for transmitted light. We demonstrate that in the planar chiral photonic crystal, the coupling of the normally incident light wave with low-loss waveguide and Fabry-Pérot resonance modes results in a dramatic enhancement of the optical activity.
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