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Observation of Quadratic (Charge‐2) Weyl Point Splitting in Near‐Infrared Photonic Crystals (Laser Photonics Rev. 16(1)/2022)
Author(s) -
Jörg Christina,
Vaidya Sachin,
Noh Jiho,
Cerjan Alexander,
Augustine Shyam,
von Freymann Georg,
Rechtsman Mikael C.
Publication year - 2022
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.202270002
Subject(s) - charge (physics) , physics , photonics , quadratic equation , photonic crystal , infrared , topological quantum number , laser , fourier transform , optics , charge coupled device , point (geometry) , quantum mechanics , mathematics , geometry
Weyl Points Weyl points are topological degeneracies in the band structure of periodic media that are robust against perturbations due to their integer topological charge. In article number 2100452, Christina Jörg and co‐workers experimentally demonstrate splitting of a quadratic Weyl point of charge‐2 into two linear Weyl points with charge‐1 in 3D micro‐printed photonic crystals and measure their angle‐resolved spectrum in the near‐infrared via Fourier‐transform infrared spectroscopy.