### Abstract

Language | English |
---|---|

Article number | 075502 |

Journal | Physical Review Letters |

Volume | 121 |

Issue number | 7 |

DOIs | |

State | Published - 16 Aug 2018 |

### Fingerprint

### Keywords

- PHOTONICS
- Aharonov-Bohm phase
- synthetic magnetic flux for photons
- Ultrafast Laser Inscription
- Topological edge states
- Localization
- flat bands
- optical waveguides
- LATTICE

### Cite this

*Physical Review Letters*,

*121*(7), [075502]. DOI: 10.1103/PhysRevLett.121.075502

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*Physical Review Letters*, vol. 121, no. 7, 075502. DOI: 10.1103/PhysRevLett.121.075502

**Experimental observation of Aharonov-Bohm cages in photonic lattices.** / Mukherjee, Sebabrata; Di Liberto, Marco ; Ohberg, Patrik; Thomson, Robert R.; Goldman, Nathan.

Research output: Contribution to journal › Letter

TY - JOUR

T1 - Experimental observation of Aharonov-Bohm cages in photonic lattices

AU - Mukherjee,Sebabrata

AU - Di Liberto,Marco

AU - Ohberg,Patrik

AU - Thomson,Robert R.

AU - Goldman,Nathan

PY - 2018/8/16

Y1 - 2018/8/16

N2 - We report on the experimental realization of a uniform synthetic magnetic flux and the observation of Aharonov-Bohm cages in photonic lattices. Considering a rhombic array of optical waveguides, we engineer modulation-assisted tunneling processes that effectively produce non-zero magnetic flux per plaquette. This synthetic magnetic field for light can be tuned at will by varying the phase of the modulation. In the regime where half a flux quantum is realized in each plaquette, all the energy bands dramatically collapse into non-dispersive (flat) bands and all eigenstates are completely localized. We demonstrate this Aharonov-Bohm caging by studying the propagation of light in the bulk of the photonic lattice. Besides, we explore the dynamics on the edge of the lattice and discuss how the corresponding edge states can be continuously connected to the topological edge states of the Creutz ladder. Our photonic lattice constitutes an appealing platform where the interplay between engineered gauge fields, frustration, localization and topological properties can be finely studied.

AB - We report on the experimental realization of a uniform synthetic magnetic flux and the observation of Aharonov-Bohm cages in photonic lattices. Considering a rhombic array of optical waveguides, we engineer modulation-assisted tunneling processes that effectively produce non-zero magnetic flux per plaquette. This synthetic magnetic field for light can be tuned at will by varying the phase of the modulation. In the regime where half a flux quantum is realized in each plaquette, all the energy bands dramatically collapse into non-dispersive (flat) bands and all eigenstates are completely localized. We demonstrate this Aharonov-Bohm caging by studying the propagation of light in the bulk of the photonic lattice. Besides, we explore the dynamics on the edge of the lattice and discuss how the corresponding edge states can be continuously connected to the topological edge states of the Creutz ladder. Our photonic lattice constitutes an appealing platform where the interplay between engineered gauge fields, frustration, localization and topological properties can be finely studied.

KW - PHOTONICS

KW - Aharonov-Bohm phase

KW - synthetic magnetic flux for photons

KW - Ultrafast Laser Inscription

KW - Topological edge states

KW - Localization

KW - flat bands

KW - optical waveguides

KW - LATTICE

U2 - 10.1103/PhysRevLett.121.075502

DO - 10.1103/PhysRevLett.121.075502

M3 - Letter

VL - 121

JO - Physical Review Letters

T2 - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 7

M1 - 075502

ER -