Optical negative index metamaterials

Author: ahld

August undefined, 2024

WebAug 5, 2010 · The recently emerged fields of metamaterials and transformation optics promise a family of exciting applications such as invisibility, optical imaging with deeply subwavelength resolution and nanophotonics with the potential for … WebPlasmonic metamaterials are realizations of materials first proposed by Victor Veselago, a Russian theoretical physicist, in 1967. Also known as left-handed or negative index …

MMAE Seminar - Dr. Graeme Milton - Mechanical Metamaterials

WebSep 19, 2024 · Negative refraction, an unnatural optical phenomenon in which the incident and and refracted waves reside on the same side of the face normal, possess have demonstrated with the finding of negative index media based on artificially engineered photonic structures called metamaterials. It has received wide attention due to its … WebJan 1, 2007 · A negative refractive index of n ′ = −0.3 ± 0.1 in the optical range was observed in 2005 at the telecommunication wavelength λ = 1.5 μm in an electron-beam-fabricated sample of paired rods (... sugheraia

[PDF] Optical negative-index metamaterials Semantic …

WebJan 1, 2006 · Both experiments and simulations demonstrate that a negative refractive index n' approximately -0.3 is achieved at the optical communication wavelength of 1.5 microm using the array of... WebJan 5, 2007 · Since the first demonstration ( 6) of an artificial NIM in 2000, metamaterials have exhibited a broad range of properties and potential applications: nearly zero reflectance; nanometer-scale light sources and focusing; miniaturization of devices, such as antennas and waveguides; and novel devices for medical imaging, especially magnetic … WebApr 7, 2024 · The physics of metamaterials is discussed along with their relationships to the ideas of resonance. Properties of negative index of refraction, perfect lens, and unusual optical effects the new optics of metamaterial media makes available are examined. Related effects in acoustics are also covered. sughere

Wideband negative permeability metamaterial with non-Foster ...

Negative-Index Metamaterials: Going Optical IEEE Journals

WebAug 5, 2010 · This study demonstrates the possibility of fabricating an optical negative-index metamaterial that is not limited by the inherent loss in its metal constituent. Main … WebJan 1, 2009 · 7.1 Recent Advances of Nonlinear Effects in Metamaterials. In all the preceding chapters, we studied the linear properties of optical metamaterials, assuming that the effective electric permittivity ε and magnetic permeability μ are independent of the incident light intensity. Indeed, an overwhelming portion of the experimental results on ... sughera foglieWebPractical optical negative index materials based on coupled plasmon resonances must overcome reflection and absorption. Simulations show that matched impedance and … sughereto orchidee

"WebNov 9, 2015 · The control of the optical activity and ellipticity of a medium has drawn considerable attention due to the recent developments in metamaterial design techniques and a deeper understanding of the light matter interaction in composite metallic structures. Indeed, recently proposed designs of metaatoms have enabled the realisation of … " - Optical negative index metamaterials

Optical negative index metamaterials

WebJan 31, 2011 · Metamaterials showing negative refractive indexes, also called negative-index materials (NIMs), have also been demonstrated in the infrared range and at the … WebJan 1, 2007 · Metamaterials can show unique advantages, such as negative refractive index [16], perfect lens [17], cloaking [18], which are not possessed by natural materials and …

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WebFeb 17, 2014 · Dark energy with negative pressure and positive energy density is believed to be responsible for the accelerated expansion of the universe. Quite a few theoretical … WebAug 6, 2004 · Abstract. Recently, artificially constructed metamaterials have become of considerable interest, because these materials can exhibit electromagnetic characteristics unlike those of any conventional materials. Artificial magnetism and negative refractive index are two specific types of behavior that have been demonstrated over the past few …

WebIn particular, three stochastic optimization tools (genetic algorithm, particle swarm optimization, and simulated annealing) are used for designing a low-loss optical negative … WebNegative index materials, exhibit optical properties opposite to those of glass, air, and the other conventional materials. At the correct frequencies, the negative index materials refract electromagnetic waves in novel ways, to a zero index or negative index.

WebJan 1, 2009 · Negative-Index Metamaterials W. Cai & V. Shalaev Chapter First Online: 10 September 2009 5093 Accesses 2 Citations Abstract The refractive index is one of the most important parameters for an optical medium. Defined as n = c/v, it measures the comparative velocity of light in different media. WebJul 9, 2024 · The resonant wavelength increasing with the refractive index of the media makes the metamaterials potential platforms for both negative index structures and optical sensors. 1 Introduction The periodic arrangement of subwavelength elements is known to generate unique electromagnetic (EM) properties mostly governed by the geometry rather …

WebAug 9, 2016 · For example, metamaterials can exhibit negative permittivity ε and/or permeability μ, negative refractive index, near-zero ε values (i.e. ENZ media) or zero (volume) averaged refractive index regions resulting in non …

WebOptical negative-index metamaterials Artiﬁ cially engineered metamaterials are now demonstrating unprecedented electromagnetic properties that cannot be obtained with … pair apple watch without cameraWebJul 8, 2012 · The analysis and simulation of negative effective permeability of a magnetic metamaterial is presented, including parasitic effects. Beyond known issues of non … sughere livornoWebAug 15, 2008 · Metamaterials are artificially designed subwavelength composites possessing extraordinary optical properties that do not exist in nature. They can alter the … pair apple watch with samsung phoneWebNegative refractive index in artificial metamaterials. The effective permeability and the refractive index of nanofabricated media composed of pairs of identical gold nanopillars … sughera bonsaiWebMay 26, 2011 · The possibility of creating optical negative-index metamaterials (NIMs) using metallic and dielectric (insulating) nanostructures has triggered intense basic and … pair apple watch with iphoneWebMay 1, 2008 · Metamaterials that have a negative index of refraction (negative-index metamaterials or NIMs) may lead to the development of novel devices ranging from optical antennas with superior properties and a perfect lens (superlens and hyperlens), capable of imaging objects with resolution much smaller than the wavelength of light, to ultra … sughera living capWebMar 9, 2016 · Materials with negative Poisson's ratio or negative refractive index are now classic examples. The effective mass density, which governs the propagation of elastic … sugherete