FSS, HIS and Extraordinary transmission
14:55 : A New Approach for Extraordinary Transmission through Subwavelength Apertures Using ENNZ Metamaterials
Elham Baladi, Justin G. Pollock, Ashwin K. Iyer
University of Alberta (Canada) Extraordinary transmission (ET) through a square array of subwavelength apertures on a metallic screen has been studied extensively, and has been attributed mainly to the interaction of surface plasmons, or the formation of leaky waves. This work describes a novel approach for achieving ET, in which the subwavelength apertures are treated as below-cutoff circular waveguides. Lining these apertures with epsilon-negative and near-zero (ENNZ) permittivity metamaterials enables the propagation of frequency-reduced guided modes through the apertures, resulting in strong transmission.
15:10 : Hybridized Concentric-Twisted DSRRs Leading to Plasmon Induced Transparency
Mohammad Hokmabadi, Patrick Kung, Seongsin Kim
The University of Alabama (USA) We introduce a novel scheme to generate Plasmon Induced Transparency (PIT) by hybridizing two concentric-twisted double split ring resonators. We demonstrate that counter-directional twisting of small SRRs can perturb both SRRs response eventuating new states through red shift of the first and blue shift of the second resonance. Contrarily, by co-directional twisting of small SRRs and focusing on first resonance, we manifest PIT which is formed as a result of splitting the first resonance into two dependent bright modes.
15:25 : Design of a novel dual-band 2.4/5.5 GHz Frequency Selective Surface using loop elements
Reza Chaharmir, J. Ethier, J. Shaker
Communication research Centre Canada (Canada) A novel dual-band Frequency Selective Surface (FSS) using a combination of open and closed loops is designed to block Wi-Fi signals at 2.45 GHz and 5.5 GHz and transmit the signals outside of the Wi-Fi bands. The structure was fabricated using Printed Electronics (PE) technology and good agreement between measured and simulated results was achieved.
15:40 : Role of waveguide mode in the extraordinary optical transmission without plasmons
Yunya Xie, Haitao Liu, Hongwei Jia, Ying Zhong
Nankai University (China) We propose a microscopic surface-mode model for the extraordinary optical transmission through subwavelength metallic slit array covered with a thin dielectric layer under illumination of transverse-electric polarization. The model captures the main feature of EOT and provides a phase-matching condition to predict the transmission resonance. Quantitative comparison between numerical calculations and model predictions shows that besides the fundamental waveguide mode, other residual field in the thin dielectric layer also contributes to the EOT without surface plasmon polariton.
15:55 : Ultra-wide Band Metasurface for Low-profile RF Antenna Applications Based on High-Mu Low-Epsilon Composites
Taulant Rexhepi, David Crouse
CUNY City College of New York (USA) Metamaterial based antennas have been extensively studied in the past decade as means to reduce size of planar antennas. However they suffer from imposed bandwidth limitations which confines their use to only narrowband applications. In this work we present an ultra-wide band high impedance surface based on high permeability low permittivity substrate containing composite materials.