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Proceedings Paper

Dispersion engineering for 3D subwavelength imaging using photonic crystals
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Paper Abstract

We experimentally demonstrate subwavelength resolution imaging at microwave frequencies by a three-dimensional (3D) photonic crystal flat lens using full 3D negative refraction. The flat lens is made of a body-centered cubic photonic crystal (PhC) whose dispersion at the third band results in group velocity opposite to phase velocity for electromagnetic waves. The photonic crystal was fabricated in a layer-by-layer process. Two different sources (monopole and pinhole) were used as imaged objects and a monopole detector was employed for detection in the image region. By scanning the detector, we obtained the images of the pinhole and monopole sources, seperately. The image of the pinhole sources had subwavelength feature size in all three dimensions, which predicts a 3D imaging capability of the flat lenses. An image of two pinhole sources with subwavelength spacing showed two resolved spots, which further verified subwavelength resolution.

Paper Details

Date Published: 1 March 2006
PDF: 10 pages
Proc. SPIE 6128, Photonic Crystal Materials and Devices IV, 61280U (1 March 2006); doi: 10.1117/12.650750
Show Author Affiliations
Dennis W. Prather, Univ. of Delaware (United States)
Zhaolin Lu, Univ. of Delaware (United States)
Shouyuan Shi, Univ. of Delaware (United States)
Christopher A. Schuetz, Univ. of Delaware (United States)

Published in SPIE Proceedings Vol. 6128:
Photonic Crystal Materials and Devices IV
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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