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    Université de Fribourg

    Band gap formation and Anderson localization in disordered photonic materials with structural correlations

    Froufe-Pérez, Luis S. ; Engel, Michael ; Sáenz, Juan José ; Scheffold, Frank

    In: Proceedings of the National Academy of Sciences, 2017, vol. 114, no. 36, p. 9570–9574

    Disordered dielectric materials with structural correlations show unconventional optical behavior: They can be transparent to long-wavelength radiation, while at the same time have isotropic band gaps in another frequency range. This phenomenon raises fundamental questions concerning photon transport through disordered media. While optical transparency in these materials is robust against...

    Université de Fribourg

    Numerical study of Anderson localization of terahertz waves in disordered waveguides

    Lapointe, Clayton P. ; Zakharov, Pavel ; Enderli, F. ; Feurer, T. ; Skipetrov, S. E. ; Scheffold, Frank

    In: EPL (Europhysics Letters), 2014, vol. 105, no. 3, p. 34002

    We present a numerical study of electromagnetic wave transport in disordered quasi–one-dimensional waveguides at terahertz frequencies. Finite element method calculations of terahertz wave propagation within LiNbO3 waveguides with randomly arranged air-filled circular scatterers exhibit an onset of Anderson localization at experimentally accessible length scales. Results for the average...