Showing papers on "Transformation optics published in 2003"
TL;DR: A bilayer of materials for which not all of the principal elements of the permeability and permittivity tensors have the same sign can transfer a field distribution from one side to the other, including near fields, without requiring internal exponentially growing waves.
Abstract: The range of available electromagnetic material properties has been broadened by recent developments in structured media, notably photonic band gap materials and metamaterials. These media have allowed the realization of solutions to Maxwell’s equations not available in naturally occurring materials, fueling the discovery of new physical phenomena and the development of devices. Photonic crystal effects typically occur when the wavelength is on the same order or smaller than the lattice constant of the crystal. Metamaterials, on the other hand, have unit cell dimensions much smaller than the wavelength of interest. A homogenization process, not unlike
987 citations
TL;DR: It is demonstrated that the hysteresis-type dependence of the magnetic permeability on the field intensity allows changing the material properties from left- to right-handed and back.
Abstract: We analyze the properties of microstructured materials with negative refraction, the so-called left-handed metamaterials. We consider a two-dimensional periodic structure created by arrays of wires and split-ring resonators embedded into a nonlinear dielectric, and calculate the effective nonlinear electric permittivity and magnetic permeability. We demonstrate that the hysteresis-type dependence of the magnetic permeability on the field intensity allows changing the material properties from left- to right-handed and back. These effects can be treated as the second-order phase transitions in the transmission properties induced by the variation of an external field.
541 citations
Patent•
02 Jun 2003
TL;DR: A linear metamaterial comprises a transmission line, having a linear dimension, and is loaded with capacitors, and shunted with an inductor such that for an electromagnetic wave having a wavelength greater than the linear dimension and traveling along the axis of the transmission line is simultaneously negative as mentioned in this paper.
Abstract: A linear metamaterial comprises a transmission line, having a linear dimension, and is loaded with capacitors, and shunted with an inductor such that for an electromagnetic wave, having a wavelength greater than the linear dimension and traveling along the axis of the transmission line, the effective permeability and permittivity of the metamaterial are simultaneously negative. Applications for the metameterial are also disclosed.
232 citations
TL;DR: In this article, the first reflection measurements of a composite double negative (DNG) metamaterial, also known as a left-handed material (LHM), have been reported, and very high transmission values of the metammaterial are observed within a frequency range for which both effective permeability and permittivity are expected to be negative.
Abstract: We report free space transmission and the first reflection measurements of a composite double negative (DNG) metamaterial, also known as a left-handed material (LHM). The metamaterial composes of the split-ring-resonators and discontinuous thin wires. Very high transmission values of the metamaterial are observed within a frequency range for which both effective permeability and permittivity are expected to be negative.
132 citations
Patent•
02 Jun 2003
TL;DR: A linear metamaterial comprises a transmission line, having a linear dimension, and is loaded with capacitors, and shunted with an inductor such that for an electromagnetic wave having a wavelength greater than the linear dimension and traveling along the axis of the transmission line is simultaneously negative as discussed by the authors.
Abstract: A linear metamaterial comprises a transmission line, having a linear dimension, and is loaded with capacitors, and shunted with an inductor such that for an electromagnetic wave, having a wavelength greater than the linear dimension and traveling along the axis of the transmission line, the effective permeability and permittivity of the metamaterial are simultaneously negative. Applications for the metameterial are also disclosed.
74 citations
08 Jun 2003
TL;DR: The author presents a brief background and the history of complex media, in particular the materials with negative permittivity and permeability, and then he discusses some of the salient electromagnetic features of these metamaterials.
Abstract: Here the author presents a brief background and the history of complex media, in particular the materials with negative permittivity and permeability, and then he discusses some of the salient electromagnetic features of these metamaterials. This is followed by description of some of the ideas regarding potential future applications of these metamaterials in devices and components, along with physical remarks and intuitive justification.
45 citations
Proceedings Article•
06 Jun 2003TL;DR: In this article, the authors measured transmission and reflection from split ring resonators, thin wires, and composite metamaterials in free space for the X-band measurement with high transmission magnitude for frequencies where both SRR and wire have effective negative permeability and permittivity.
Abstract: We measured transmission and reflection from split ring resonators, thin wires, and composite metamaterials in free space. X-band measurement exhibits high transmission magnitude for frequencies where both SRR and wire have effective negative permeability and permittivity, respectively.
3 citations
29 Jun 2003
TL;DR: In this article, the authors investigated the propagation of plane homogeneous and inhomogeneous waves in such media taking into account their anisotropy, and showed that the anisotropic properties of the so-called artificial negative magnetic permeability and left-handed media are discussed.
Abstract: Electrodynamic properties of the so-called artificial negative magnetic permeability and left-handed media are discussed. The propagation of plane homogeneous and inhomogeneous waves in such media taking into account their anisotropy is investigated.
10 Jul 2003
TL;DR: In this paper, the effect of losses and dispersion on the effective refractive index of metal-dielectric nano-structures was analyzed in the visible range of frequencies considering the properties of real metals.
Abstract: There has been a growing interest in the design and fabrication of composite materials to enhance the flexibility in specifying their optical properties for device applications. Here we show that metamaterials composed of metal-dielectric nano-structures can be engineered to have an effective refractive index below unity at optical wavelengths. These materials show intriguing optical properties including total external reflection. Different rigorous and approximate modeling techniques will be compared. We will show a novel approach to derive a realistic value of the effective refractive index from the reflection coefficients of finite slabs. The effect of losses and dispersion will be analyzed in the visible range of frequencies considering the properties of real metals. We explain the differences among ultra-low refractive index metamaterials, photonic bandgap materials, and metals. Finally, we propose the application of these metamaterials to waveguide structures that guide light in air by total external reflection.