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Anderson localization in Bragg-guiding arrays with negative defects

Valery E Lobanov1, Yaroslav V Kartashov, Victor A Vysloukh

  • 1ICFO—Institut de Ciencies Fotoniques, and Universitat Politecnica de Catalunya, 08860 Castelldefels (Barcelona), Spain. valery.lobanov@icfo.eu

Optics Letters
|October 3, 2012
PubMed

We show that Anderson localization is possible in waveguide arrays with periodically spaced defect waveguides having a lower refractive index. Such localization is mediated by Bragg reflection, and it takes place even if diagonal or off-diagonal disorder affects only defect waveguides. For off-diagonal disorder the localization degree of the intensity distributions monotonically grows with increasing disorder. In contrast, under appropriate conditions, increasing diagonal disorder may result in weaker localization.

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