Back to Search
Start Over
Pseudo-spin switches and Aharonov-Bohm effect for topological boundary modes.
- Source :
-
Science Advances . 4/12/2024, Vol. 10 Issue 15, p1-9. 9p. - Publication Year :
- 2024
-
Abstract
- Topological boundary modes in electronic and classical-wave systems exhibit fascinating properties. In photonics, topological nature of boundary modes can make them robust and endows them with an additional internal structure--pseudo-spins. Here, we introduce heterogeneous boundary modes, which are based on mixing two of the most widely used topological photonics platforms--the pseudo-spin-Hall-like and valley-Hall photonic topological insulators. We predict and confirm experimentally that transformation between the two, realized by altering the lattice geometry, enables a continuum of boundary states carrying both pseudo-spin and valley degrees of freedom (DoFs). When applied adiabatically, this leads to conversion between pseudo-spin and valley polarization. We show that such evolution gives rise to a geometrical phase associated with the synthetic gauge fields, which is confirmed via an Aharonov-Bohm type experiment on a silicon chip. Our results unveil a versatile approach to manipulating properties of topological photonic states and envision topological photonics as a powerful platform for devices based on synthetic DoFs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 23752548
- Volume :
- 10
- Issue :
- 15
- Database :
- Academic Search Index
- Journal :
- Science Advances
- Publication Type :
- Academic Journal
- Accession number :
- 176621316
- Full Text :
- https://doi.org/10.1126/sciadv.adn6095