Metamaterials and negative index materials I
14:00 Keynote talk : Photonic Hypercrystals
Purdue University (USA) Photonics hypercrystals represent a new class of artificial optical media. These hyperbolic metamaterials, with periodic spatial variation of dielectric permittivity on subwavelength scale, combine the features of optical metamaterials and photonic crystals.
14:30 Invited talk : A New Hollow-H-Shaped Negative Refractive Index Metamaterial
S. S. Islam, M. R. I. Faruque, M. T. Islam
Universiti Kebangsaan Malaysia (Malaysia) In this paper, a new double negative metamaterial unit cell is presented that was designed on Rogers 3010 substrate material. It displays negative refractive index property with negative permittivity and permeability simultaneously in the multi-band range. In this design, a composite Hollow-H-shaped' unit cell structure was constructed. The proposed design also display resonances in the multi-band frequency range with negative refractive index property of wider bandwidth, when the Rogers RT 6010 is employed instead of Rogers 3010 substrate material.
14:50 : Evidence for the mechanical effect of co-moving potentials on atomic trajectories, approaching the meta-medium regime
Franck Correia (1),Thierry Taillandier-Loize (1),Gabriel Dutier (1),Francisco Perales (1),Nathalie Fabre (1),Jacques Baudon (1),Martial Ducloy (2),Mohamed Boustimi (3),Valerij Bocvarski (4)
(1)Paris 13 University (France) , (2)Nanyang Technological University (Singapore) , (3)Umm Al Qura University (Saudi Arabia) , (4)Institute of Physics (Serbia) The effect of a special type of time-and-space dependent (so-called co-moving) potential on atomic trajectories is experimentally investigated. Through the use of a beam of argon metastable atoms (Ar* 3P2) passing through a magnetic field alternated in space and modulated in time, negative refraction of the wave packet and deviation of trajectories are expectable with this kind of potential.
15:05 : Finite temperature quantum-electrodynamical generalized responses for relativistic free electrons
Carlos A. A. de Carvalho
Universidade Federal do Rio de Janeiro (Brazil) We compute finite temperature electromagnetic responses of a relativistic free electron gas from quantum electrodynamics. Our field theory approach yields polarizations and magnetizations as functions of both electric and magnetic fields. In the non-relativistic limit, expressions reduce to well-known results: the Lindhard and Thomas-Fermi formulae, a sum of Pauli and Landau expressions for the magnetic susceptibility, and Drude responses in the long wavelength limit. Generalized expressions should be relevant for astrophyiscal observations, as well as in synchrotron environments.
15:20 : Efficient reflective linear polarization converter based on L-shaped metallic antenna
Julien Jaeck (1),Quentin Levesque (1),Mathilde Makhsiyan (1),Patrick Bouchon (1),Fabrice Pardo (2),Riad Haidar (3),Jean-Luc Pelouard (2)
(1)Onera - The French Aerospace Lab (France) , (2)Lab. de Photonique et de Nanostructures (France) , (3)Onera, The French Aerospace Lab (France) This paper demonstrate both theoretically and experimentally that a metasurface of L-shape metal-insulator-metal antennas is a highly efficient linear polarization converter and angularly independent. The nanoantenna geometries are controlled in order to produce a one micrometer wide band in the medium infrared region with over 95 percent of mean polarization conversion ratio. This effect is due to two localized resonances in the L-shaped arms of the antenna. Further engineering could be demonstrated by combining different antennas inside the period.
15:35 : Nano-patterning of active hyperbolic metamaterials for enhanced radiative decay
T. Galfsky (1),E. E. Narimanov (2),V. M. Menon (1)
(1)City University of New York (USA) , (2)Purdue University (USA) Emitters embedded inside HMM have been shown to experience enhanced radiative decay rate. In this work a patterned hyperbolic metamaterial embedded with an active layer of quantum dots forms an array of nano-resonators which exhibit enhanced radiative decay rate and out-coupling.
15:50 : Flexible Printed Chipless RFID Tag Using Metamaterial-Split Ring Resonator
M. E. Jalil, M. K. A. Rahim, N. A. Samsuri, R. Dewan
University Technology Malaysia (Malaysia) In this paper, an 8-bits passive chip-less RFID using modified complementary split ring resonator (MCSSR) which is one of type metamaterial structure is introduced which operates from 3 to 7.5 GHz. The flexible chip-less tag is designed on Polyethyle Terephtalate (PET) substrate with overall dimension of 25 mm x 20mm. The 8 bits chipless tag with 4 ring resonators is investigated to evaluate the bit performance.
16:05 : Low-profile metamaterial-based L-band antennas
S. N. Burokur (1),A.-C. Lepage (2),S. Varault (2),X. Begaud (1),G.-P. Piau (3),A. de Lustrac (1)
(1)Paris Sud University (France) , (2)ESPCI ParisTech (France) , (3)Airbus Group Innovations (France) The aim of the present contribution is to show that metasurfaces like Reactive Impedance Surfaces (RIS) and Artificial Magnetic Conductors (AMC) can be efficiently used in the design of low-profile circularly-polarized L-band antennas. We present the design, simulation and characterization of the compact and low-profile antennas. In order to prove the benefit of these two solutions, they will be compared to a circularly-polarized microstrip patch antenna using the same materials.