Metamaterials and negative index materials V

10:20 : Design of metamaterial microwave devices

E. Laamari (1),Saleh Chaker (1),D. Bensafieddine (1),M. Bouzouad (2)

(1)Telecommunications, Signal and Systems Laboratory (Algeria) , (2)University Amar Telidji of Laghouat (Algeria)

The main goal of this work is to design metamaterial based microwave devices. The body metamaterial layer behaves as an a refractive index close to zero (n1). On this body metamaterial layer we can specify different zones, with arbitrary shape size, and position, behaving as an effective medium with a refractive index greater than unity (n2). we obtain waveguides (circular, rectangular, etc) horn antennas (conical or pyramidal, etc) with different size.
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10:35 : Reconfigurable microwave metamaterial based on arrays of magnetic nanowires

Ivan Lisenkov (1),Anatoly Belanovsky (2),Sergey Nikitov (2),Vasyl Tyberkevych (1),Andrei Slavin (1)

(1)Oakland University (USA) , (2)Moscow Institute of Physics and Technology (Russia)

We propose to use arrays of magnetic nanowires in the ferromagnetic and antiferromagnetic ground states as a reconfigurable metamaterial for microwave applications. We show that the reflection of a plane electromagnetic wave from the array strongly depends on the magnetic ground state of the array. In particular, in the case of a ferromagnetic ground state the reflected signal is nearly circularly polarized in a wide range of the angles of incidence.
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10:50 : Polarization-independent negative index metamaterial

Morteza Karami, Steven Kitchin, Michael Fiddy

University of North Carolina at Charlotte (USA)

We have designed a polarization-independent left-handed metamaterial, and describe its electromagnetic properties. A 3D crossed design based on a meandering wire structure is demonstrated as a polarization insensitive metamaterial with negative effective index.
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11:05 : Temperature tunable semiconductor metameterial for THz applications

Kirill Koshelev (1),Andrey Bogdanov (2)

(1)State Polytechnic University (Russia) , (2)ITMO University (Russia)

We introduce a new model of homogeneous temperature tunable THz metamaterial with controllable frequency range of hyperbolic dispersion based on semiconductor superlattice with doped quantum wells. We propose a method of thermal manipulating the shape of equal fre- quency surface in k-space. We discuss the phenomenon of permittivity tensor signature changing which results in transition from dielectric to hyperbolic regime of the material.
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11:20 : Measurements of Green function and local density of states in hyperbolic metamaterials.

Kaizad Rustomji (1),Charaf Abdeddaim (1),Md. Mahbub Alam (1),Md. Shofiqul Islam Khan (1),Redha Abdeddaim (1),Sebastien Guenneau (1),Boris Kuhlmey (2),Stefan Enoch (1)

(1)Institut Fresnel (France) , (2)University of Sydney (Australia)

We will present microwave measurements and modelling of hyperbolic metamaterial. We focus on measurements of emission properties of embedded sources in addition to effective permeability and permittivity.
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