Amorphous Photonic Lattices: Band Gaps, Effective Mass and Suppressed Transport

Details Amorphous Photonic Lattices: Band Gaps, Effective Mass and Suppressed Transport Amorphous Photonic Lattices: Band Gaps, Effective Mass and Suppressed Transport

2010-12-15

arxiv.org/abs/1012.3239v1

Physics

Optics

Scientific paper

We present, theoretically and experimentally, amorphous photonic lattices exhibiting a band-gap yet completely lacking Bragg diffraction: 2D waveguides distributed randomly according to a liquid-like model responsible for the absence of Bragg peaks as opposed to ordered lattices containing disorder, which always exhibit Bragg peaks. In amorphous lattices the bands are comprised of localized states, but we find that defect states residing in the gap are more localized than the Anderson localization length. Finally, we show how the concept of effective mass carries over to amorphous lattices.

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