Journal ArticleDOI
Magnetism from conductors and enhanced nonlinear phenomena
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TLDR
In this paper, it was shown that microstructures built from nonmagnetic conducting sheets exhibit an effective magnetic permeability /spl mu/sub eff/, which can be tuned to values not accessible in naturally occurring materials.Abstract:
We show that microstructures built from nonmagnetic conducting sheets exhibit an effective magnetic permeability /spl mu//sub eff/, which can be tuned to values not accessible in naturally occurring materials, including large imaginary components of /spl mu//sub eff/. The microstructure is on a scale much less than the wavelength of radiation, is not resolved by incident microwaves, and uses a very low density of metal so that structures can be extremely lightweight. Most of the structures are resonant due to internal capacitance and inductance, and resonant enhancement combined with compression of electrical energy into a very small volume greatly enhances the energy density at critical locations in the structure, easily by factors of a million and possibly by much more. Weakly nonlinear materials placed at these critical locations will show greatly enhanced effects raising the possibility of manufacturing active structures whose properties can be switched at will between many states.read more
Citations
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Asymptotics for metamaterials and photonic crystals.
TL;DR: It is demonstrated how one replaces metamaterial and photonic crystal structures asymptotically by a continuum, and therefore by a set of equations, that captures the behaviour of potentially high-frequency waves propagating through a periodic medium.
Journal ArticleDOI
Metamaterials with negative permeability and negative refractive index: experiments and simulations
TL;DR: In this paper, the transmission characteristics of split-ring resonators and left-handed metamaterials in the microwave frequency regime were investigated and the reflection characteristics of ordered and disordered LHM structures were verified to have a negative refractive index.
Journal ArticleDOI
Fabrication methods of 3D periodic metallic nano/microstructures for photonics applications
Muntasir Hossain,Min Gu +1 more
TL;DR: In this article, the recent progress on the experimental methods for the realisation of three-dimensional periodic metallic and thin metal film coated dielectric nano/microstructures operating from optical to mid-infrared frequencies has been reviewed.
Journal ArticleDOI
Polarization-sensitive microelectromechanical systems based tunable terahertz metamaterials using three dimensional electric split-ring resonator arrays
Fusheng Ma,You Qian,Yu-Sheng Lin,Hongwei Liu,Xinhai Zhang,Zhen Liu,Julius Ming-Lin Tsai,Chengkuo Lee +7 more
TL;DR: In this paper, structural reconfigurable metamaterials with a polarization-sensitivity have been proposed for tuning the resonance frequency of the electric split-ring resonators, which is shown to be either tunable or non-tunable with the electric field of the incident wave.
Journal ArticleDOI
Midinfrared semiconductor optical metamaterials
Anthony J. Hoffman,A. Sridhar,Phillip X. Braun,Leonid Alekseyev,Leonid Alekseyev,Scott S. Howard,Kale J. Franz,Liwei Cheng,Fow-Sen Choa,Deborah Lee Sivco,Viktor A. Podolskiy,Evgenii E. Narimanov,Evgenii E. Narimanov,Claire F. Gmachl +13 more
TL;DR: In this paper, a novel class of semiconductor metamaterials that employ a strongly anisotropic dielectric function to achieve negative refraction in the mid-infrared region of the spectrum, ∼8.5-13μm, is reported.
References
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