Magneto-phonon polaritons in two-dimension antiferromagnetic/ion-crystalic photonic crystals

• Published in: Photonics and nanostructures Vol. 10; no. 1; pp. 1 - 8
• Main Authors: Ta, J.X., Song, Y.L., Wang, X.Z.
• Format: Journal Article
• Language: English
• Published: Tokyo Elsevier B.V 01.01.2012; Elsevier
• Subjects: Antiferromagnet; Antiferromagnetism; Condensed matter: structure, mechanical and thermal properties; Dispersions; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Ionic-crystal; Lattice dynamics; Magneto-phonon polaritons; Nanostructure; Negative refraction; Optical materials; Optics; Phonons and vibrations in crystal lattices; Photonic bandgap materials; Photonic crystal; Photonic crystals; Physics; Polaritons; Polycarbonates; Resonant frequencies; Two dimensional; Antiferromagnet; Magneto-phonon polaritons; Negative refraction; Photonic crystal; Ionic-crystal; Electromagnetic wave refraction; Dielectric materials; Dispersion relations; Two dimensional structure; Photonic crystals; Antiferromagnetic materials; Left-handed materials; Square lattices; Permittivity; Ionic crystals; Surface polaritons
• ISSN: 1569-4410; 1569-4429
• DOI: 10.1016/j.photonics.2011.05.007

► We investigated the magneto-phonon polaritons of the two-dimension magnetic photonic crystal (MPC). ► This MPC is constructed by embedding a periodical square lattice of ionic-crystal cylinders into an antiferromagnet. ► We find some new surface modes and two mini bulk bands, which possess distinctive features. ► In the two mini bands, an electromagnetic wave propagating in the x-y plane experiences a negative refraction index. ► The MPC is of left-handedness. Magneto-phonon polaritons in a two-dimension photonic crystal (PC) are discussed. This PC is constructed by embedding a periodical square lattice of ionic-crystal cylinders into an antiferromagnet. The two media are dispersive, with their individual resonant frequencies near each other. We first set up an effective-medium method to obtain the effective magnetic permeability and dielectric permittivity of the PC, followed by the dispersion relations of surface and bulk polaritons. There are a number of new surface polaritons, and two new distinctive bulk polariton bands in which the negative refraction and left-handedness can appear. The numerical calculations are based on the example, FeF2/TlBr PC.