Abbreviated Journal Title
WAVE-GUIDE STRUCTURES; PLASMONIC NANOCLUSTERS; PHASE SINGULARITIES; OPTICAL-FIELDS; METAMATERIALS; METASURFACES; SCATTERING; PLANAR; EMISSION; DIPOLE; Optics
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.
D' Archangel, Jeffrey; Tucker, Eric; Raschke, Markus B.; and Boreman, Glenn, "Array truncation effects in infrared frequency selective surfaces" (2014). Faculty Bibliography 2010s. 4997.