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Light localization in optically induced deterministic aperiodic Fibonacci lattices
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DOI：10.1364/OPTICA.3.000711.png)
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Abstract
En 中文
As light localization becomes increasingly pronounced in photonic systems with less order, we investigate optically induced two-dimensional Fibonacci structures that are supposed to be among the most ordered realizations of deterministic aperiodic patterns. For the generation of corresponding refractive index structures, we implement a recently developed incremental induction method using nondiffracting Bessel beams as waveguide formation entities. Even though Fibonacci structures present slightly reduced order, we show that transverse light transport here is significantly hampered in comparison with discrete diffraction in a periodic lattice. Numerical simulations that support our experimental findings help to identify three cases of input waveguide configurations that significantly determine the initial propagation in a Fibonacci structure. These crucial starting conditions determine the character of light transport, yielding either localization or enhanced expansion. A diverse set of light transport scenarios is identified therein. (C) 2016 Optical Society of America
Keywords:
ANDERSON LOCALIZATION
WAVE
DIFFRACTION
TRANSPORT
CRYSTALS
SPECTRA
ORDER
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