Nonlocal topological insulators: Deterministic aperiodic arrays supporting localized topological states protected by nonlocal symmetries
Abstract
A concept of nonlocal topological phases of DAAs introduced here establishes a different direction in topological physics and offers approaches to emulate higher-dimensional topology in lower-dimensional systems. Our study also unveils opportunities to engineer topologically protected states in aperiodic systems and paves the path to application of resonances associated with such states, whose robustness is ensured by nonlocal symmetries of DAAs. In particular, the possibility to engineer multiple localized resonances via dimensional reduction and their unique features, such as precise spectral properties stemming from their topological nature, offers remarkable opportunities for practical applications, from robust resonators to sensors and aperiodic topological lasers.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 19, 2021
- Source ID
- 10.1073/pnas.2100691118
Entities
People
- Alexander B Khanikaev
- Andrea Alù
- Kai Chen
- Matthew Weiner
- Mengyao Li
- Xiang Ni
Organizations
- CUNY Graduate School and University Center
- City College of New York
- City University of New York
- National Science Foundation
- Simons Foundation