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Proceedings Paper

An efficient self-collimating photonic crystal coupling technique in the RF regime
Author(s): Jerico N. Sabas; Iftekhar O. Mirza; Shouyuan Shi; Dennis W. Prather
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Paper Abstract

In this paper, we present both numerical and experimental results for the waveguiding of light using a low-index-contrast (LIC) self-collimating photonic crystal (SCPhC) in the RF frequency regime. This waveguiding structure utilizes the unique interactions of light with the periodic structure of the photonic crystal (PhC) to propagate a beam of light without divergence. This design also employs materials with a low index contrast (LIC), which reduces the electromagnetic signature of the PhC. This SCPhC was designed by extracting its dispersion contours and numerically simulating it using HFSS, a commercial 3-D, full-wave FEM software. In particular, we addressed the issue of coupling the PhC to a coaxial medium by designing an input/output (I/O) coupler consisting of a coaxial-to-waveguide transition, a rectangular waveguide and a tapered dielectric transition. We fabricated the SCPhC with a rigid polyurethane foam slab and Rexolite polystyrene rods using an automated CNC router to drill the periodic lattice in the slab. We also fabricated the dielectric segments of the I/O couplers with Rexolite slabs using an automated milling machine. Using these I/O couplers and SCPhC slab, we simulated and subsequently measured experimentally an insertion loss, for the entire system, of -3.3 dB through a 24" PhC slab, and a coupling loss of -0.95 dB at each coupler-PhC interface.

Paper Details

Date Published: 24 February 2010
PDF: 9 pages
Proc. SPIE 7609, Photonic and Phononic Crystal Materials and Devices X, 76090M (24 February 2010); doi: 10.1117/12.842478
Show Author Affiliations
Jerico N. Sabas, Univ. of Delaware (United States)
Iftekhar O. Mirza, Univ. of Delaware (United States)
Shouyuan Shi, Univ. of Delaware (United States)
Dennis W. Prather, Univ. of Delaware (United States)


Published in SPIE Proceedings Vol. 7609:
Photonic and Phononic Crystal Materials and Devices X
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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