Möbius edge band and Weyl-like semimetal flat-band in topological photonic waveguide array by synthetic gauge flux
The presence of π gauge flux enabled by positive and negative hopping amplitude can lead to Möbius bands, which was recently demonstrated in both realistic acoustic and photonic lattices, twisted at k = π. Here, we show that the artificial gauge flux configuration can be achieved by exploiting the i...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2023-07-01
|
| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2023-0311 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850268562239782912 |
|---|---|
| author | Liu Zhenzhen Wei Guochao Wu Huizhou Xiao Jun-Jun |
| author_facet | Liu Zhenzhen Wei Guochao Wu Huizhou Xiao Jun-Jun |
| author_sort | Liu Zhenzhen |
| collection | DOAJ |
| description | The presence of π gauge flux enabled by positive and negative hopping amplitude can lead to Möbius bands, which was recently demonstrated in both realistic acoustic and photonic lattices, twisted at k = π. Here, we show that the artificial gauge flux configuration can be achieved by exploiting the interactions between photonic s and p orbital-like fundamental modes in circular and peanut-shaped waveguides, respectively. By manipulating the interplay between the gauge fields and the crystal symmetry, we show that breaking the primitive translation symmetry through lattice site dimerization and deformation can cause the original Dirac semimetal phase, characterized by a four-fold Dirac point at the Brillouin zone center, to transform into various topological phases. The designed photonic waveguide array supports topological phases such as Möbius insulator and Weyl-like semimetal phases. Noticeably different to the existing cases, we explicitly show that the twisting Möbius bands cross each other at k = 0 due to the lattice gauging with alternating sign, which results in distinct beam dynamics excitation. We also present Weyl-like flat-band edge states in such photonics waveguide arrays. Our results suggest that such s − p hybridized photonic waveguide array servers as a convenient and flexible platform for studying topological physics, particularly in simulating the effects of gauge field in alternative configuration. |
| format | Article |
| id | doaj-art-36484c0c3748404389d9c402a8ade2c7 |
| institution | OA Journals |
| issn | 2192-8614 |
| language | English |
| publishDate | 2023-07-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-36484c0c3748404389d9c402a8ade2c72025-08-20T01:53:26ZengDe GruyterNanophotonics2192-86142023-07-0112173481349010.1515/nanoph-2023-0311Möbius edge band and Weyl-like semimetal flat-band in topological photonic waveguide array by synthetic gauge fluxLiu Zhenzhen0Wei Guochao1Wu Huizhou2Xiao Jun-Jun3College of Electronic and Information Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen518055, ChinaCollege of Electronic and Information Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen518055, ChinaCollege of Electronic and Information Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen518055, ChinaCollege of Electronic and Information Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen518055, ChinaThe presence of π gauge flux enabled by positive and negative hopping amplitude can lead to Möbius bands, which was recently demonstrated in both realistic acoustic and photonic lattices, twisted at k = π. Here, we show that the artificial gauge flux configuration can be achieved by exploiting the interactions between photonic s and p orbital-like fundamental modes in circular and peanut-shaped waveguides, respectively. By manipulating the interplay between the gauge fields and the crystal symmetry, we show that breaking the primitive translation symmetry through lattice site dimerization and deformation can cause the original Dirac semimetal phase, characterized by a four-fold Dirac point at the Brillouin zone center, to transform into various topological phases. The designed photonic waveguide array supports topological phases such as Möbius insulator and Weyl-like semimetal phases. Noticeably different to the existing cases, we explicitly show that the twisting Möbius bands cross each other at k = 0 due to the lattice gauging with alternating sign, which results in distinct beam dynamics excitation. We also present Weyl-like flat-band edge states in such photonics waveguide arrays. Our results suggest that such s − p hybridized photonic waveguide array servers as a convenient and flexible platform for studying topological physics, particularly in simulating the effects of gauge field in alternative configuration.https://doi.org/10.1515/nanoph-2023-0311artificial gauge fieldbeam dynamicsmöbius insulatorphotonic waveguideweyl semimetal |
| spellingShingle | Liu Zhenzhen Wei Guochao Wu Huizhou Xiao Jun-Jun Möbius edge band and Weyl-like semimetal flat-band in topological photonic waveguide array by synthetic gauge flux Nanophotonics artificial gauge field beam dynamics möbius insulator photonic waveguide weyl semimetal |
| title | Möbius edge band and Weyl-like semimetal flat-band in topological photonic waveguide array by synthetic gauge flux |
| title_full | Möbius edge band and Weyl-like semimetal flat-band in topological photonic waveguide array by synthetic gauge flux |
| title_fullStr | Möbius edge band and Weyl-like semimetal flat-band in topological photonic waveguide array by synthetic gauge flux |
| title_full_unstemmed | Möbius edge band and Weyl-like semimetal flat-band in topological photonic waveguide array by synthetic gauge flux |
| title_short | Möbius edge band and Weyl-like semimetal flat-band in topological photonic waveguide array by synthetic gauge flux |
| title_sort | mobius edge band and weyl like semimetal flat band in topological photonic waveguide array by synthetic gauge flux |
| topic | artificial gauge field beam dynamics möbius insulator photonic waveguide weyl semimetal |
| url | https://doi.org/10.1515/nanoph-2023-0311 |
| work_keys_str_mv | AT liuzhenzhen mobiusedgebandandweyllikesemimetalflatbandintopologicalphotonicwaveguidearraybysyntheticgaugeflux AT weiguochao mobiusedgebandandweyllikesemimetalflatbandintopologicalphotonicwaveguidearraybysyntheticgaugeflux AT wuhuizhou mobiusedgebandandweyllikesemimetalflatbandintopologicalphotonicwaveguidearraybysyntheticgaugeflux AT xiaojunjun mobiusedgebandandweyllikesemimetalflatbandintopologicalphotonicwaveguidearraybysyntheticgaugeflux |