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Periodically oscillating Anderson localization in random photonic superlattices with resonant units
Proc. SPIE 6989, 69890A (2008); http://dx.doi.org/10.1117/12.779968
Tuesday 8 April 2008
Strasbourg, France
Photonic Crystal Materials and Devices VIII
Richard M. De La Rue, Ceferino López, Michele Midrio, Pierre Viktorovitch
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Add to FacebookIn strongly disordered systems, where Anderson localization is present, the mean transmittance (<T>) decays exponentially on average with increasing sample size. However, <T> often shows large fluctuations originating from extremely rare occurrences of necklaces of resonantly coupled states, possessing almost unity transmission. We show in this study that in one-dimensional (1D) random photonic systems with resonant layers these fluctuations appear to be very regular and have a period defined by the localization length ξ of the system. We demonstrate that necklace states are the origin of these well-defined oscillations. We predict that in such a random system efficient transmission channels form regularly each time the increasing sample length fits so-called optimal-order necklaces and demonstrate the phenomenon through numerical experiments. Our results provide new insight into the physics of Anderson localization in random systems with resonant units.
© 2008 COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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Online Apr 21, 2008
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Mher Ghulinyan, "Periodically oscillating Anderson localization in random photonic superlattices with resonant units",
Proc. SPIE 6989, 69890A (2008); http://dx.doi.org/10.1117/12.779968
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