Orbital Edge States in a Photonic Honeycomb Lattice

Anno: 2017

Autori: Milicevic M., Ozawa T., Montambaux G., Carusotto I., Galopin E., Lemaitre A., Le Gratiet L., Sagnes I., Bloch J., Amo A.

Affiliazione autori: Univ Paris Saclay, Univ Paris Sud, CNRS, Ctr Nanosci & Nanotechnol,Marcoussis C2N, F-91460 Marcoussis, France; Univ Trento, INO CNR BEC Ctr, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy; Univ Paris Saclay, Univ Paris Sud, CNRS, Phys Solides Lab, F-91405 Orsay, France.

Abstract: We experimentally reveal the emergence of edge states in a photonic lattice with orbital bands. We use a two-dimensional honeycomb lattice of coupled micropillars whose bulk spectrum shows four gapless bands arising from the coupling of p-like photonic orbitals. We observe zero-energy edge states whose topological origin is similar to that of conventional edge states in graphene. Additionally, we report novel dispersive edge states in zigzag and armchair edges. The observations are reproduced by tight-binding and analytical calculations, which we extend to bearded edges. Our work shows the potentiality of coupled micropillars in elucidating some of the electronic properties of emergent two-dimensional materials with orbital bands.

Giornale/Rivista: PHYSICAL REVIEW LETTERS

Volume: 118 (10)      Da Pagina: 107403-1  A: 107403-6

Maggiori informazioni: This work was supported by the French National Research Agency (ANR) program Labex NanoSaclay via the projects Qeage (Grant No. ANR-11-IDEX-0003-02) and ICQOQS (Grant No. ANR-10-LABX-0035), the French RENATECH network, the ERC grants Honeypol and QGBE, the EU-FET Proactiv grant AQUS (Project No. 640800), and by the Provincia Autonoma di Trento, partially through the project On silicon chip quantum optics for quantum computing and secure communications-SiQuro.
Parole chiavi: Topological Insulators; Black Phosphorus; Surface-states; Graphene; Symmetry; Systems; Light
DOI: 10.1103/PhysRevLett.118.107403

Citazioni: 89
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18
Riferimenti tratti da Isi Web of Knowledge: (solo abbonati)
Link per visualizzare la scheda su IsiWeb: Clicca qui
Link per visualizzare la citazioni su IsiWeb: Clicca qui