Observation of Quadratic (Charge-2) Weyl Point Splitting in Near-Infrared Photonic Crystals
Abstract
Weyl points are point degeneracies that occur in momentum space of 3D periodic materials and are associated with a quantized topological charge. Here, the splitting of a quadratic (charge-2) Weyl point into two linear (charge-1) Weyl points in a 3D micro-printed photonic crystal is observed experimentally via Fourier-transform infrared spectroscopy. Using a theoretical analysis rooted in symmetry arguments, it is shown that this splitting occurs along high-symmetry directions in the Brillouin zone. This micro-scale observation and control of Weyl points is important for realizing robust topological devices in the near-infrared.
- Authors:
-
[1];
[2];
[3];
[6];
[2]
- Technische Univ. Kaiserslautern (Germany). Research Center OPTIMAS; Pennsylvania State Univ., University Park, PA (United States)
- Pennsylvania State Univ., University Park, PA (United States)
- Pennsylvania State Univ., University Park, PA (United States); Univ. of Illinois at Urbana-Champaign, IL (United States)
- Pennsylvania State Univ., University Park, PA (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies
- Technische Univ. Kaiserslautern (Germany). Research Center OPTIMAS
- Technische Univ. Kaiserslautern (Germany). Research Center OPTIMAS; Fraunhofer Inst. for Industrial Mathematics ITWM, Kaiserslautern (Germany)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program; US Office of Naval Research (ONR); German Research Foundation (DFG)
- OSTI Identifier:
- 1841983
- Report Number(s):
- SAND-2022-0498J
Journal ID: ISSN 1863-8880; 702559
- Grant/Contract Number:
- NA0003525; N00014-20-1-2325; 277625399
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Laser & Photonics Reviews
- Additional Journal Information:
- Journal Volume: 16; Journal Issue: 1; Journal ID: ISSN 1863-8880
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; direct laser writing; photonic crystals; topological photonics; Weyl points
Citation Formats
Jörg, Christina, Vaidya, Sachin, Noh, Jiho, Cerjan, Alexander, Augustine, Shyam, von Freymann, Georg, and Rechtsman, Mikael C. Observation of Quadratic (Charge-2) Weyl Point Splitting in Near-Infrared Photonic Crystals. United States: N. p., 2021.
Web. doi:10.1002/lpor.202100452.
Jörg, Christina, Vaidya, Sachin, Noh, Jiho, Cerjan, Alexander, Augustine, Shyam, von Freymann, Georg, & Rechtsman, Mikael C. Observation of Quadratic (Charge-2) Weyl Point Splitting in Near-Infrared Photonic Crystals. United States. https://doi.org/10.1002/lpor.202100452
Jörg, Christina, Vaidya, Sachin, Noh, Jiho, Cerjan, Alexander, Augustine, Shyam, von Freymann, Georg, and Rechtsman, Mikael C. Fri .
"Observation of Quadratic (Charge-2) Weyl Point Splitting in Near-Infrared Photonic Crystals". United States. https://doi.org/10.1002/lpor.202100452. https://www.osti.gov/servlets/purl/1841983.
@article{osti_1841983,
title = {Observation of Quadratic (Charge-2) Weyl Point Splitting in Near-Infrared Photonic Crystals},
author = {Jörg, Christina and Vaidya, Sachin and Noh, Jiho and Cerjan, Alexander and Augustine, Shyam and von Freymann, Georg and Rechtsman, Mikael C.},
abstractNote = {Weyl points are point degeneracies that occur in momentum space of 3D periodic materials and are associated with a quantized topological charge. Here, the splitting of a quadratic (charge-2) Weyl point into two linear (charge-1) Weyl points in a 3D micro-printed photonic crystal is observed experimentally via Fourier-transform infrared spectroscopy. Using a theoretical analysis rooted in symmetry arguments, it is shown that this splitting occurs along high-symmetry directions in the Brillouin zone. This micro-scale observation and control of Weyl points is important for realizing robust topological devices in the near-infrared.},
doi = {10.1002/lpor.202100452},
journal = {Laser & Photonics Reviews},
number = 1,
volume = 16,
place = {United States},
year = {Fri Dec 10 00:00:00 EST 2021},
month = {Fri Dec 10 00:00:00 EST 2021}
}
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