Generation of a two-dimensional limited-diffraction beam with self-healing ability by annular-type photonic crystals

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In this work, we present the design of a photonic structure for the generation of in-plane two-dimensional (2D) limited-diffraction beam. We have numerically investigated the characteristics of the light propagation passing through a 2D square-lattice annular-type photonic crystal shaped in an axicon configuration. Careful selection of the operating frequency as well as the optimization of the apex rod position creates a less diffracted beam whose transverse intensity profile closely resembles a zero-order Bessel function. The created beam dramatically resists against the spatial spreading over a propagation distance of 50 mu m, after focusing with a spot size of similar to 0.23 mu m. The self-healing capability of the generated limited-diffraction beam is demonstrated by placing obstacles with different sizes and shapes along the optical axis. The two features that accompany with such beams, i.e., diffraction-limited propagation and reconstruction ability after encountering obstructions, may strengthen its usage in manipulation of light propagation in various environments. (C) 2012 Optical Society of America
Publisher
OPTICAL SOC AMER
Issue Date
2012-06
Language
English
Article Type
Article
Citation

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, v.29, no.6, pp.1245 - 1256

ISSN
0740-3224
DOI
10.1364/JOSAB.29.001245
URI
http://hdl.handle.net/10203/282605
Appears in Collection
EE-Journal Papers(저널논문)
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