Slow surface phonon polaritons for sensing in the midinfrared spectrum

Abstract

We demonstrate a reflection-type sensor in the midinfrared spectra based on resonant excitation of surface phonon polaritons (SPhPs). In this range, SPhPs are characterized by the high density of states associated with slow surface waves that lead to enhanced resonance absorption. Delocalized SPhPs were excited by irradiating TM-polarized light on a one-dimensional grating embedded in a SiC substrate. The sensor response was characterized by changing the refractive index (RI) of a lossless CO2 gas. A detection limit of 2×10−5 RI units was obtained at a wavelength of 11.9 μm.

Investigation on Spectral Properties of Metal–Insulator–Metal Film Stack with Rectangular Hole Arrays

“…Numerous reports have been published on spectral control using various surface gratings and photonic crystals. Most of these efforts were based on the fundamental principle of interactions between electromagnetic wave radiation and structured surfaces such as the surface plasmon polaritons (SPPs) [5,6,9,13], the Fabry-Pérot-like modes [10,11], the magnetic polaritons (MPs) [12], the surface phonon polaritons [14][15][16], the photonic bandgaps [13], and the microcavity effect [5,17], which are dependent on the materials (metallic or dielectric) and the spectral features of electromagnetic waves.…”

Optical Properties of Antiferromagnetic/Ion-Crystalic Photonic Crystals

“…Recent years, based on magnetic multilayers or superlattices, where nonmagnetic layers are of ordinary dielectric and their dielectric function is a constant, the polaritons in these structures called the MPCs were discussed [29][30][31][32][33][34]. On the other hand, ones were interested in the phonon polaritons [35][36], where the surface polariton modes could be focused by a simple way and probably possess new applications. In this part, the collective polaritons, MPPs in a superlattice structure comprised of alternating AF and IC layers, will be discussed.…”

Magneto-phonon polaritons of antiferromagnetic/ion-crystal superlattices

“…Recently ones were interested in the phonon polaritons, 12,13 where the surface polariton modes could be focused by a simple way and probably possess new applications. Recently ones were interested in the phonon polaritons, 12,13 where the surface polariton modes could be focused by a simple way and probably possess new applications.…”