Multilayer bandpass filter‐polarizer with stopband extension far beyond twofold center frequency

Abstract

We propose a multilayer bandpass filter in which every resonator consists of two identical dielectric layers separated by a grating of parallel strip conductors. The resonators themselves are separated from each other and from the ambient space by gratings of strip conductors with an axis orthogonal to the axis of the gratings inside the resonators. The proposed filter construction acts at the same time as a polarizer. The device frequency response computed with use of the provided simple formulas is in a good qualitative agreement with numerical electromagnetic analysis of its 3D model.

Temperature‐mediated excitation of defect modes in a periodic structure at terahertz frequencies

“…1,2 At the opposite, such structures can be designed to increase reflectivity and can be used as optical mirrors to achieve high reflectivity either at a fixed wavelength 3 or in a broad frequency range. 4 Various other applications are possible, for example, as beam splitters, 5,6 filters that transmit (or reflect) parts of the spectrum, [7][8][9][10] polarizers, 11 plasmonic devices, 12 to improve Raman spectroscopy, 13 to localize field, [14][15][16] and so on.…”