Double Gyroids for Frequency-Isolated Weyl Points in the Visible Regime and Interference Lithographic Design
- Authors
- Park, Haedong; Lee, Seungwoo
- Issue Date
- 17-6월-2020
- Publisher
- AMER CHEMICAL SOC
- Keywords
- D-2-symmetric gyroid; frequency-isolation; interference lithography; Weyl point; topological photonics
- Citation
- ACS PHOTONICS, v.7, no.6, pp.1577 - 1585
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS PHOTONICS
- Volume
- 7
- Number
- 6
- Start Page
- 1577
- End Page
- 1585
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/54996
- DOI
- 10.1021/acsphotonics.0c00532
- ISSN
- 2330-4022
- Abstract
- Easy-to-craft photonic crystals enabling frequency-isolated Weyl points, especially at visible wavelengths, are yet to be developed. To this end, we exploited double gyroid (DG) crystals with Parity (P)-breaking and nanoscale unit cells, which are readily compatible with currently accessible interference lithography (IL). By modulating a level-set equation, we designed the D-2-symmetric single gyroid (SG), perturbed from an O-symmetric SG, and found that the DG crystals, consisting of D-2- and O-symmetric SGs with opposite chirality, can exhibit frequency-isolated Weyl points. As a route to the fabrication of the designed P-breaking DG crystals with a nanoscale unit cell, the IL condition was defined in terms of (i) wavenumbers of multiple beams and (ii) their own complex electric fields. Our lithographically designed nanoscale DG crystals, even with a practical material condition, exhibited the Weyl points whose wavelengths were totally separated from other neighboring bands. Given the established design strategy suitable for a practical processing (e.g., IL), we have provided a viable route for on-chip integration of such Weyl materials, enabling topologically nontrivial surface states.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - Graduate School > KU-KIST Graduate School of Converging Science and Technology > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.