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Alexander Spracklen
Researcher at Heriot-Watt University
Publications - 8
Citations - 1200
Alexander Spracklen is an academic researcher from Heriot-Watt University. The author has contributed to research in topics: Hubbard model & Quantum tunnelling. The author has an hindex of 5, co-authored 7 publications receiving 963 citations.
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Observation of a Localized Flat-Band State in a Photonic Lieb Lattice
Sebabrata Mukherjee,Alexander Spracklen,Debaditya Choudhury,Nathan Goldman,Nathan Goldman,Patrik Öhberg,Erika Andersson,Robert R. Thomson +7 more
TL;DR: The first experimental realization of a dispersionless state is demonstrated, in a photonic Lieb lattice formed by an array of optical waveguides, which opens an exciting door towards quantum simulation of flat-band models in a highly controllable environment.
Journal ArticleDOI
Experimental observation of anomalous topological edge modes in a slowly driven photonic lattice.
Sebabrata Mukherjee,Alexander Spracklen,Manuel Valiente,Erika Andersson,Patrik Öhberg,Nathan Goldman,Robert R. Thomson +6 more
TL;DR: This work demonstrates the experimental observation of anomalous topological edge modes in a 2D photonic lattice, where these propagating edge states are shown to coexist with a quasi-localized bulk.
A Viewpoint on: Observation of Localized States in Lieb Photonic Lattices
Diederik Wiersma,Rodrigo A. Vicencio,Camilo Cantillano,Luis Morales-Inostroza,Cristian Mejía-Cortés,Alexander Szameit,Mario I. Molina,Alexander Spracklen,Debaditya Choudhury,Nathan Goldman,Robert R. Thomson +10 more
TL;DR: In this article, the authors present the first experimental demonstration of compacton-like linear states in flat-band lattices, which exhibit three tight-binding bands, with one being perfectly flat.
Journal ArticleDOI
Modulation-assisted tunneling in laser-fabricated photonic Wannier-Stark ladders
Sebabrata Mukherjee,Alexander Spracklen,Debaditya Choudhury,Nathan Goldman,Patrik Öhberg,Erika Andersson,Robert R. Thomson +6 more
TL;DR: In this paper, the authors observed that W-S states become increasingly localized, and eventually fully localized to one site, as the curvature of the lattice is increased, by tuning the strength of inter-site coupling.
Journal ArticleDOI
Observation of pair tunneling and coherent destruction of tunneling in arrays of optical waveguides
Sebabrata Mukherjee,Manuel Valiente,Nathan Goldman,Alexander Spracklen,Erika Andersson,Patrik Öhberg,Robert R. Thomson +6 more
TL;DR: In this paper, a photonic system that simulates the one-dimensional two-particle Hubbard model is realized by means of two-dimensional arrays of coupled optical waveguides, fabricated using femtosecond laser inscription.