Observation of localized flat-band modes in a quasi-one-dimensional photonic rhombic lattice

Sebabrata Mukherjee, Robert R. Thomson

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

We experimentally demonstrate the photonic realization of a dispersionless flat band in a quasi-one-dimensional photonic lattice fabricated by ultrafast laser inscription. In the nearest neighbor tight binding approximation, the lattice supports two dispersive and one nondispersive (flat) band. We experimentally excite superpositions of flat-band eigenmodes at the input of the photonic lattice and show the diffractionless propagation of the input states due to their infinite effective mass. In the future, the use of photonic rhombic lattices, together with the successful implementation of a synthetic gauge field, will enable the observation of Aharonov-Bohm photonic caging.

Original languageEnglish
Pages (from-to)5443-5446
Number of pages4
JournalOptics Letters
Volume40
Issue number23
DOIs
Publication statusPublished - 1 Dec 2015

Keywords

  • WAVE-GUIDE ARRAYS
  • COUPLED RESONATOR LATTICES
  • ULTRACOLD QUANTUM GASES
  • ANDERSON LOCALIZATION
  • BLOCH OSCILLATIONS
  • FEMTOSECOND LASER
  • MAGNETIC-FIELDS

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