Transmission properties of microwaves at an optical Weyl point in a three-dimensional chiral photonic crystal

Microwave transmission measurements were performed for a three-dimensional (3D) layer-by-layer chiral photonic crystal (PhC), whose photonic band structure contains 3D singular points, Weyl points. For the frequency and wavevector in the vicinity of a Weyl point, the transmitted intensity was found...

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Veröffentlicht in:Optics express 2021-08, Vol.29 (17), p.27127-27136
Hauptverfasser: Takahashi, Shun, Tamaki, Souma, Yamashita, Kenichi, Yamaguchi, Takuya, Ueda, Tetsuya, Iwamoto, Satoshi
Format: Artikel
Sprache:eng
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Zusammenfassung:Microwave transmission measurements were performed for a three-dimensional (3D) layer-by-layer chiral photonic crystal (PhC), whose photonic band structure contains 3D singular points, Weyl points. For the frequency and wavevector in the vicinity of a Weyl point, the transmitted intensity was found to be inversely proportional to the square of the propagation length. In addition, the transmitted wave was well-collimated in the plane parallel to the PhC layers, even for point-source incidence. When a plane wave was incident on the PhC containing metal scatters, the planar wavefront was reconstructed after the transmission, indicating a cloaking effect.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.431233