Author
John B. Pendry
Other affiliations: University of California, San Diego, Duke University, Bell Labs ...read more
Bio: John B. Pendry is an academic researcher from Imperial College London. The author has contributed to research in topics: Metamaterial & Plasmon. The author has an hindex of 100, co-authored 536 publications receiving 88802 citations. Previous affiliations of John B. Pendry include University of California, San Diego & Duke University.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, a procedure was introduced for the calculation of probability distributions for the resistance of a 1D chain of atoms in the case that the site energies are randomly distributed: so-called diagonal disorder.
Abstract: In a previous paper a procedure was introduced for the calculation of probability distributions for the resistance of a 1D chain of atoms in the case that the site energies are randomly distributed: so-called diagonal disorder. In this paper the treatment is extended to treat the case where the hopping integrals are also disordered (off-diagonal disorder). Analytic solutions are possible in limiting cases and display some new features unique to the off-diagonal disorder situation.
30 citations
TL;DR: The general strategy based on TO is reviewed to design plasmonic devices capable of harvesting light over a broadband spectrum and achieving considerable field confinement and enhancement.
Abstract: Transformation optics (TO) is a new tool for controlling electromagnetic fields. In the context of metamaterial technology, it provides a direct link between a desired electromagnetic (EM) phenomenon and the material response required for its occurrence. Recently, this powerful framework has been successfully exploited to study surface plasmon assisted phenomena such as light harvesting. Here, we review the general strategy based on TO to design plasmonic devices capable of harvesting light over a broadband spectrum and achieving considerable field confinement and enhancement. The methodology starts with two-dimensional (2D) cases, such as 2D metal edges, crescent-shaped cylinders, nanowire dimers, and rough metal surfaces, and has been well extended to fully-fledged three-dimensional (3D) situations. The largely analytic approach gives physical insights into the processes involved and suggests the way forward to study a wide variety of plasmonic nanostructures.
30 citations
TL;DR: In this article, two prisms of this material, one hexagonal and one square, have been constructed and characterized both at the metamaterial's resonant frequency of 21.5 MHz and above it, where the effective permeability is strongly negative.
Abstract: The 'Swiss Roll' metamaterial medium is well suited to operation in the radio frequency (RF) range, because it has a low resonant frequency and a strong magnetic response. Two prisms of this material, one hexagonal and one square, have been constructed and characterized both at the metamaterial's resonant frequency of 21.5 MHz and above it, where the effective permeability is strongly negative. A series of spatial resonances is observed in the field patterns on the surfaces of the prisms. Using an effective medium description, we have carried out both analytical and numerical modelling of the electromagnetic behaviour of the metamaterial, and find, within certain obvious limitations, extremely good agreement between the measured and modelled results.
30 citations
Patent•
06 Feb 2008
TL;DR: In this article, the authors define an electromagnetic distance between first and second locations substantially greater than a physical distance between the first and the second locations, and the first two locations may be occupied by antennas having an inter-structure coupling (such as a near-field coupling) that is a function of the electromagnetic distance.
Abstract: Apparatus, methods, and systems provide electromagnetic compression. In some approaches the electromagnetic compression is achieved with metamaterials. In some approaches the electromagnetic compression defines an electromagnetic distance between first and second locations substantially greater than a physical distance between the first and second locations, and the first and second locations may be occupied by first and second structures (such as antennas) having an inter-structure coupling (such as a near-field coupling) that is a function of the electromagnetic distance. In some approaches the electromagnetic compression reduces the spatial extent of an antenna near field.
30 citations
TL;DR: Jung et al. as mentioned in this paper proposed a framework for condensed matter theory and applied it in the field of physics and nanotechnology, with the aim to solve the problem of particle motion.
Abstract: J. Jung,1,2 F. J. García-Vidal,2,* L. Martín-Moreno,3 and J. B. Pendry4 1Department of Physics and Nanotechnology, Aalborg University, Skjernvej 4A, DK-9220 Aalborg Øst, Denmark 2Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain 3Departamento de Física de la Materia Condensada and Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC-Universidad de Zaragoza, E-50009 Zaragoza, Spain 4Condensed Matter Theory Group, The Blackett Laboratory, Imperial College, London SW7 2BW, United Kingdom Received 23 December 2008; revised manuscript received 18 March 2009; published 23 April 2009
30 citations
Cited by
More filters
28 Jul 2005
TL;DR: PfPMP1）与感染红细胞、树突状组胞以及胎盘的单个或多个受体作用，在黏附及免疫逃避中起关键的作�ly.
Abstract: 抗原变异可使得多种致病微生物易于逃避宿主免疫应答。表达在感染红细胞表面的恶性疟原虫红细胞表面蛋白1（PfPMP1）与感染红细胞、内皮细胞、树突状细胞以及胎盘的单个或多个受体作用，在黏附及免疫逃避中起关键的作用。每个单倍体基因组var基因家族编码约60种成员，通过启动转录不同的var基因变异体为抗原变异提供了分子基础。
18,940 citations
TL;DR: By altering the structure of a metal's surface, the properties of surface plasmons—in particular their interaction with light—can be tailored, which could lead to miniaturized photonic circuits with length scales that are much smaller than those currently achieved.
Abstract: Surface plasmons are waves that propagate along the surface of a conductor. By altering the structure of a metal's surface, the properties of surface plasmons--in particular their interaction with light--can be tailored, which offers the potential for developing new types of photonic device. This could lead to miniaturized photonic circuits with length scales that are much smaller than those currently achieved. Surface plasmons are being explored for their potential in subwavelength optics, data storage, light generation, microscopy and bio-photonics.
10,689 citations
TL;DR: These experiments directly confirm the predictions of Maxwell's equations that n is given by the negative square root ofɛ·μ for the frequencies where both the permittivity and the permeability are negative.
Abstract: We present experimental scattering data at microwave frequencies on a structured metamaterial that exhibits a frequency band where the effective index of refraction (n) is negative. The material consists of a two-dimensional array of repeated unit cells of copper strips and split ring resonators on interlocking strips of standard circuit board material. By measuring the scattering angle of the transmitted beam through a prism fabricated from this material, we determine the effective n, appropriate to Snell's law. These experiments directly confirm the predictions of Maxwell's equations that n is given by the negative square root of epsilon.mu for the frequencies where both the permittivity (epsilon) and the permeability (mu) are negative. Configurations of geometrical optical designs are now possible that could not be realized by positive index materials.
8,477 citations
TL;DR: 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.
8,135 citations
TL;DR: Recent advances at the intersection of plasmonics and photovoltaics are surveyed and an outlook on the future of solar cells based on these principles is offered.
Abstract: The emerging field of plasmonics has yielded methods for guiding and localizing light at the nanoscale, well below the scale of the wavelength of light in free space. Now plasmonics researchers are turning their attention to photovoltaics, where design approaches based on plasmonics can be used to improve absorption in photovoltaic devices, permitting a considerable reduction in the physical thickness of solar photovoltaic absorber layers, and yielding new options for solar-cell design. In this review, we survey recent advances at the intersection of plasmonics and photovoltaics and offer an outlook on the future of solar cells based on these principles.
8,028 citations