| Title: |
Direct observation of photonic Landau levels and helical edge states in strained honeycomb lattices |
| Authors: |
Jamadi, O., Rozas, E., Salerno, G., Milićević, M., Ozawa, T., Sagnes, I., Lemaître, A., Gratiet, L. Le, Harouri, A., Carusotto, I., Bloch, J., Amo, A. |
| Source: |
Light-Science & Applications 9, 144 (2020) |
| Publication Year: |
2020 |
| Collection: |
Condensed Matter
Physics (Other) |
| Subject Terms: |
Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Optics |
| More Details: |
We report the realization of a synthetic magnetic field for photons and polaritons in a honeycomb lattice of coupled semiconductor micropillars. A strong synthetic field is induced in both the s and p orbital bands by engineering a uniaxial hopping gradient in the lattice, giving rise to the formation of Landau levels at the Dirac points. We provide direct evidence of the sublattice symmetry breaking of the lowest-order Landau level wavefunction, a distinctive feature of synthetic magnetic fields. Our realization implements helical edge states in the gap between n=0 and n=1 Landau levels, experimentally demonstrating a novel way of engineering propagating edge states in photonic lattices. In light of recent advances in the enhancement of polariton-polariton nonlinearities, the Landau levels reported here are promising for the study of the interplay between pseudomagnetism and interactions in a photonic system. |
| Document Type: |
Working Paper |
| DOI: |
10.1038/s41377-020-00377-6 |
| Access URL: |
http://arxiv.org/abs/2001.10395 |
| Accession Number: |
edsarx.2001.10395 |
| Database: |
arXiv |
