Authors

J. D. Archangel; E. Tucker; M. B. Raschke;G. Boreman

Comments

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Abbreviated Journal Title

Opt. Express

Keywords

WAVE-GUIDE STRUCTURES; PLASMONIC NANOCLUSTERS; PHASE SINGULARITIES; OPTICAL-FIELDS; METAMATERIALS; METASURFACES; SCATTERING; PLANAR; EMISSION; DIPOLE; Optics

Abstract

A metasurface consisting of an infinite array of square loops was designed for maximal absorptivity for s-polarized light at a wavelength of 10.6 mu m and 60 degrees off-normal. We investigate the effects of array truncation in finite arrays of this design using far-field FTIR spectroscopy and scattering scanning near-field optical microscopy. The far-field spectra are observed to blue-shift with decreasing array size. The near-field images show a corresponding decrease in uniformity of the local electric field amplitude and phase spatial distributions. Simulations of the far-field absorption spectra and local electric field are consistent with the measured results.

Journal Title

Optics Express

Volume

22

Issue/Number

13

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

16645

Last Page

16659

WOS Identifier

WOS:000338055900139

ISSN

1094-4087

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