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Proceedings Paper

Tuning subwavelength-structured focus in the hyperbolic metamaterials
Author(s): Rong Pan; Zhixiang Tang; Jin Pan; Runwu Peng
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Paper Abstract

In this paper, we have systematically investigated light propagating in the hyperbolic metamaterials (HMMs) covered by a subwavelength grating. Based on the equal-frequency contour analyses, light in the HMM is predicted to propagate along a defined direction because of its hyperbolic dispersion, which is similar to the self-collimating effects in photonic crystals. By using the finite-difference time-domain, numerical simulations demonstrate a subwavelength bright spot at the intersection of the adjacent directional beams. Different from the images in homogeneous media, the magnetic fields and electric fields at the spot are layered, especially for the electric fields Ez that is polarized to the propagating direction, i.e., the layer normal direction. Moreover, the Ez is hollow in the layer plane and is stronger than the other electric field component Ex. Therefore, the whole electric field is structured and its pattern can be tuned by the HMM’s effective anisotropic electromagnetic parameters. Our results may be useful for generating subwavelength structured light.

Paper Details

Date Published: 19 October 2016
PDF: 7 pages
Proc. SPIE 10154, Advanced Optical Design and Manufacturing Technology and Astronomical Telescopes and Instrumentation, 101541U (19 October 2016); doi: 10.1117/12.2247145
Show Author Affiliations
Rong Pan, Hunan Univ. (China)
Zhixiang Tang, Hunan Univ. (China)
Jin Pan, Hunan Univ. (China)
Runwu Peng, Changsha Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 10154:
Advanced Optical Design and Manufacturing Technology and Astronomical Telescopes and Instrumentation
Min Xu; Ji Yang, Editor(s)

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