title: Bragg reflection of terahertz waves in plasmonic crystals.
abstract: We present experimental and theoretical studies on terahertz surface plasmon (TSP) propagation on slit and rectangular aperture arrays in an aluminum sheet. Terahertz waves are coupled onto the plasmonic structures via a parallel plate waveguide. Long-lasting oscillations are observed in the temporal pulse shape after propagating through the periodic structure, whose Fourier transformation into the frequency domain results in Bragg-resonance spectral features. We show that the interference between the incident wave and the radiation reflected from both the aperture array and the waveguide block is responsible for this Bragg-resonance behavior. The reflection coefficient for a single slit is deduced to be 0.017 +/- 0.002.
authors.affiliation: Division of Electrical and Electronics Engineering, Korea Maritime University, Busan 606-791, Korea.
authors.forename: Eui Su
authors.initials: ES
authors.lastname: Lee
authors.forename: D H
authors.initials: DH
authors.lastname: Kang
authors.forename: A I
authors.initials: AI
authors.lastname: Fernandez-Dominguez
authors.forename: F J
authors.initials: FJ
authors.lastname: Garcia-Vidal
authors.forename: L
authors.initials: L
authors.lastname: Martin-Moreno
authors.forename: D S
authors.initials: DS
authors.lastname: Kim
authors.forename: Tae-In
authors.initials: TI
authors.lastname: Jeon
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D012031:Refractometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D055053:Terahertz Radiation