Array truncation effects in infrared frequency selective surfaces
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. (C) 2014 Optical Society of America
"Array truncation effects in infrared frequency selective surfaces" (2014). Faculty Bibliography 2010s. 4997.