Topic
Transformation optics
About: Transformation optics is a research topic. Over the lifetime, 2687 publications have been published within this topic receiving 102378 citations.
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TL;DR: In this paper, an analytical method of electromagnetic wave interactions with a general radially anisotropic cloak is established, which is able to deal with arbitrary parameters r r, r rr, tr, and tr of a radially aisotropic inhomogeneous shell.
Abstract: An analytical method of electromagnetic wave interactions with a general radially anisotropic cloak is established. It is able to deal with arbitrary parameters rr, rr, tr, and tr of a radially anisotropic inhomogeneous shell. The general cloaking condition is proposed from the wave relations, in contrast to the method of transformation optics. Spherical metamaterial cloaks with improved invisibility performance are achieved with optimal nonlinearity in transformation and core-shell ratio.
52 citations
01 Jan 2015
TL;DR: In this article, the authors proposed a tunable left-handed transmission line for nonlinear and tunable METAMaterials, including Quantum Metamaterials and nonlinear Optics with Backward Waves.
Abstract: Nonlinear Metamaterials.- Quantum Metamaterials.- Nonlinear and Tunable Left-Handed Transmission Line Metamaterials.- Nonlinear Optics with Backward Waves.- Tailoring Nonlinear Interactions in Metamaterials.- Intrinsic Localization, Nonlinear Transmission and Multistability in SQUID-based Metamaterials- Nonlinear Forward-Backward Waves in Artificial Materials.- Optimization Strategies for Secondorder Nonlinear Metamaterials.- Parametric Amplification of Magneto-inductive Waves.- Electro-optical Tuning of the Electromagnetic Response of Metamaterials.- Micromachined Tunable Metamaterials.
52 citations
TL;DR: A class of invisible reservoirs and amplifiers for waves, which are referred to as Schrödinger hats, are described, which contain standard transformation optics based cloaks, resonant cloaks and cloaked sensors and possible applications include near-field quantum microscopy.
Abstract: The advent of transformation optics and metamaterials has made possible devices producing extreme effects on wave propagation. Here we describe a class of invisible reservoirs and amplifiers for waves, which we refer to as Schrodinger hats. The unifying mathematical principle on which these are based admits such devices for any time harmonic waves modeled by either the Helmholtz or Schrodinger equation, e.g., polarized waves in electromagnetism, acoustical waves and matter waves in quantum mechanics. Schrodinger hats occupy one part of a parameter-space continuum of wave-manipulating structures which also contains standard transformation optics based cloaks, resonant cloaks and cloaked sensors. Possible applications include near-field quantum microscopy.
52 citations
TL;DR: In this paper, two approaches for retrieving quantitatively the effective chirality of metamaterials at normal incidence are introduced and compared, and it is shown that the results coincide if transitional effects between the metammaterial and the environment can be neglected.
Abstract: We introduce and compare two approaches for retrieving quantitatively the effective chirality of metamaterials at normal incidence. The retrieval employs either the reflected and transmitted amplitude of a plane wave illuminating a finite three-dimensional (3D) metamaterial or the dispersion relation of the pertinent Bloch modes in an infinite metamaterial. Both approaches are applied to characterize a 3D metamaterial consisting of a stack of metallic gammadions separated by dielectric films. It will be shown that the results coincide if transitional effects between the metamaterial and the environment can be neglected.
51 citations
TL;DR: This study numerically calculate a symmetric dolmen scheme of metamaterials corresponding to a tripod model of EIT-based optical switching and illustrates plasmonic double dark resonances.
Abstract: We have studied electromagnetically induced transparency (EIT) in metamaterials for various schemes corresponding to those in an atomic medium. We numerically calculate a symmetric dolmen scheme of metamaterials corresponding to a tripod model of EIT-based optical switching and illustrate plasmonic double dark resonances. Our study provides a fundamental understanding and useful guidelines in using metamaterials for plasmonic-based all-optical information processing.
51 citations