Topological Optical Waveguiding in Silicon and the Transition between Topological and Trivial Defect States

Andrea Blanco-Redondo, Imanol Andonegui, Matthew J. Collins, Gal Harari, Yaakov Lumer, Mikael C. Rechtsman, Benjamin J. Eggleton, Mordechai Segev

Research output: Contribution to journalArticle

71 Scopus citations

Abstract

One-dimensional models with topological band structures represent a simple and versatile platform to demonstrate novel topological concepts. Here we experimentally study topologically protected states in silicon at the interface between two dimer chains with different Zak phases. Furthermore, we propose and demonstrate that, in a system where topological and trivial defect modes coexist, we can probe them independently. Tuning the configuration of the interface, we observe the transition between a single topological defect and a compound trivial defect state. These results provide a new paradigm for topologically protected waveguiding in a complementary metal-oxide-semiconductor compatible platform and highlight the novel concept of isolating topological and trivial defect modes in the same system that can have important implications in topological physics.

Original languageEnglish (US)
Article number163901
JournalPhysical Review Letters
Volume116
Issue number16
DOIs
StatePublished - Apr 20 2016

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Blanco-Redondo, A., Andonegui, I., Collins, M. J., Harari, G., Lumer, Y., Rechtsman, M. C., Eggleton, B. J., & Segev, M. (2016). Topological Optical Waveguiding in Silicon and the Transition between Topological and Trivial Defect States. Physical Review Letters, 116(16), [163901]. https://doi.org/10.1103/PhysRevLett.116.163901