Journal
PHYSICAL REVIEW LETTERS
Volume 118, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.118.107403
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Funding
- French National Research Agency (ANR) program Labex NanoSaclay via the project Qeage [ANR-11-IDEX-0003-02]
- French National Research Agency (ANR) program Labex NanoSaclay via the project ICQOQS [ANR-10-LABX-0035]
- French RENATECH network
- ERC grant Honeypol
- ERC grant QGBE
- EU-FET Proactiv grant AQUS [640800]
- Provincia Autonoma di Trento, through the project On silicon chip quantum optics for quantum computing and secure communications-SiQuro
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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.
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