Dispersion engineering for 3D subwavelength imaging using photonic crystals

Dennis W. Prather; Zhaolin Lu; Shouyuan Shi; Christopher A. Schuetz

doi:10.1117/12.650750

1 March 2006 Dispersion engineering for 3D subwavelength imaging using photonic crystals

Dennis W. Prather, Zhaolin Lu, Shouyuan Shi, Christopher A. Schuetz

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Proceedings Volume 6128, Photonic Crystal Materials and Devices IV; 61280U (2006) https://doi.org/10.1117/12.650750
Event: Integrated Optoelectronic Devices 2006, 2006, San Jose, California, United States

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.

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Dennis W. Prather, Zhaolin Lu, Shouyuan Shi, and Christopher A. Schuetz "Dispersion engineering for 3D subwavelength imaging using photonic crystals", Proc. SPIE 6128, Photonic Crystal Materials and Devices IV, 61280U (1 March 2006); https://doi.org/10.1117/12.650750

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KEYWORDS

3D image processing

Negative refraction

Photonic crystals

Dispersion

Sensors

Image resolution

Stereoscopy

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