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arXiv · 0810.0044

Hyper-gratings: nanophotonics in planar anisotropic metamaterials

Sukosin Thongrattanasiri·Viktor A. Podolskiy
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Abstract

We present a technique capable of producing subwavelength focal spots in the far-field of the source in planar non-resonant structures. The approach combines the diffraction gratings that generate the high-wavevector-number modes and planar slabs of homogeneous anisotropic metamaterials that propagate these waves and combine them at the subwavelength focal spots. In a sense, the technique combines the benefits of Fresnel lens, near-field zone plates, hyperlens, and superlens, and at the same time resolves their fundamental limitations. Several realizations of the proposed technique for visible, near-IR, and mid-IR frequencies are proposed, and their performance is analyzed theoretically and numerically. Generalization of the developed approach for sub-diffractional on-chip photonics is suggested.

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Sukosin Thongrattanasiri, Viktor A. Podolskiy. 2008-09-30. Hyper-gratings: nanophotonics in planar anisotropic metamaterials. https://doi.org/10.1364/ol.34.000890

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