par Mukherjee, Sebabrata;Spracklen, Alexander;Choudhury, Debaditya;Goldman, Nathan ;Öhberg, Patrik;Andersson, Erika;Thomson, Robert R.R.
Référence New journal of physics, 17, page (115002)
Publication Publié, 2015
Référence New journal of physics, 17, page (115002)
Publication Publié, 2015
Article révisé par les pairs
Résumé : | We observe Wannier-Stark (W-S) localization in curved photonic lattices, realized using arrays of evanescently coupled optical waveguides. By correctly tuning the strength of inter-site coupling in the lattice, we observe that W-S states become increasingly localized, and eventually fully localized to one site, as the curvature of the lattice is increased. We then demonstrate that tunneling can be successfully restored in the lattice by applying a resonant sinusoidal modulation to the lattice position, an effect that is a direct analogue of photon-assisted tunneling. This precise tuning of the tunneling matrix elements, through resonant modulation-assisted tunneling, opens a novel route for the creation of gauge fields in laser-fabricated photonic lattices. |