Magneto-phonon polaritons of antiferromagnetic/ion-crystal superlattices

Abstract

Theory of far-infrared attenuated total reflection from surface magnetic polaritons in rare-earth superlattices Magnetic ordering and magnetic excitations in the induced moment distorted triangular antiferromagnet TlFeCl 3 under hydrostatic pressure (abstract) Magnetophonon polaritons in the superlattices composed of alternating antiferromagnetic and ion-crystal components are investigated with the transfer matrix method. Numerical simulations based on FeF 2 / TlBr superlattices show that there are four different bulk polariton bands, with negative refraction and positive refraction. Many surface polariton modes with various features arise around the bulk bands with negative refraction.

Nonlinear Propagation of ElectromagneticWaves in Antiferromagnet

“…Magnetic polaritons of AF multilayers (Oliveros, et.al., 1992;Raj & Tilley, 1987), AF superlattices with parallel or transverse surfaces Barnas, 1988) and one-dimension AF photonic crystals (Song, et.al., 2009;Ta, et. al.,2010) have been discussed with this method.…”

Optical Properties of Antiferromagnetic/Ion-Crystalic Photonic Crystals

“…The two guided modes lie in the proximity of 0.943 r    and 1.064 r    , corresponding to the mini-bands with negative group velocity in Ref. [8]. At the same time, the magnetic permeability of AF layers and the dielectric function for IC layers are both negative.…”

“…In our previous work [8], utilizing the effective medium theory, we verified the effective dielectric function and magnetic permeability are both negative in the long wavelength limit when v  and i  are negative. In other words, the AF/IC PCs is of negative refraction in the limit of long wavelength.…”

“…[8], magnetic superlattices possess two mini-bands with negative group velocity. When the incident wave is located in the frequency regions corresponding to the two mini-bands, what are the optical properties of the AF/IC PCs?…”

“…Recently, our group investigated the optical properties of antiferromagnetic/ ion-crystal (AF/IC) PCs [8][9][10][11]. It is well known that the two resonant frequencies of AFs, such as, FeF2 and MnF2, fall into the millimeter or far infrared frequencies regions and some ionic semiconductors possess a very low phonon-resonant frequency range like the AFs.…”