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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
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Journal ArticleDOI
TL;DR: In this article, the surface modes of a composite consisting of aligned metallic wires with square cross sections are investigated, on the basis of photonic band structure calculations, and the effective long-wavelength dielectric response function is computed, as a function of the filling fraction.
Abstract: The surface modes of a composite consisting of aligned metallic wires with square cross sections are investigated, on the basis of photonic band structure calculations. The effective long-wavelength dielectric response function is computed, as a function of the filling fraction. The dependence of the optical absorption on the shape of the wires and the polarization of light is discussed, and the effect of sharp corners analyzed. The effect of the interaction between the wires on the localization of surface plasmons is also addressed.

4 citations

Journal ArticleDOI
TL;DR: Une nouvelle methode est presente pour calculer les cumuls statistiques du logarithme de the transmission d'un systeme desordonne unidimensionnel.
Abstract: Electrons and other waves show strong and complex fluctuations in the transmission coefficient, \ensuremath{\Vert}${\mathit{t}}_{\mathit{L}}$${\mathrm{\ensuremath{\Vert}}}^{2}$. A theory must accurately describe the distribution for both small \ensuremath{\Vert}${\mathit{t}}_{\mathit{L}}$${\mathrm{\ensuremath{\Vert}}}^{2}$, and for large \ensuremath{\Vert}${\mathit{t}}_{\mathit{L}}$${\mathrm{\ensuremath{\Vert}}}^{2}$ which dominate the average. We present a new method for calculating the statistical cumulants of the logarithm of the transmission, -ln\ensuremath{\Vert}${\mathit{t}}_{\mathit{L}}$${\mathrm{\ensuremath{\Vert}}}^{2}$, of a one-dimensional disordered system. In the long-wavelength limit both ln\ensuremath{\Vert}${\mathit{t}}_{\mathit{L}}$${\mathrm{\ensuremath{\Vert}}}^{2}$, and the phase of ${\mathit{t}}_{\mathit{L}}$ approach a normal distribution. This does not imply that \ensuremath{\Vert}${\mathit{t}}_{\mathit{L}}$${\mathrm{\ensuremath{\Vert}}}^{2}$ or 1/\ensuremath{\Vert}${\mathit{t}}_{\mathit{L}}$${\mathrm{\ensuremath{\Vert}}}^{2}$ obey a log-normal distribution. In fact the conductance \ensuremath{\Vert}${\mathit{t}}_{\mathit{L}}$${\mathrm{\ensuremath{\Vert}}}^{2}$ is never log normal, and the resistance 1/\ensuremath{\Vert}${\mathit{t}}_{\mathit{L}}$${\mathrm{\ensuremath{\Vert}}}^{2}$ only sometimes so.

4 citations

Patent
27 Oct 2008
TL;DR: In this paper, the electromagnetic compression is achieved with metamaterials, where the electromagnetic distance between the first and second locations is greater than the physical distance 250 between the said locations.
Abstract: An apparatus comprises an electromagnetic compression structure 200 located between first and second spatial locations 201, 202. Electromagnetic waves from either of the said locations 201, 202 propagate through at least a portion of the structure 200 to reach respective remote locations 231, 232. The electromagnetic distance between the first and second locations 201, 202 is greater than the physical distance 250 between the said locations 201, 202. The spatial locations 201, 202 each may have means to generate and/or receive electromagnetic radiation such as an antenna or antenna array. The at least two said means may be coupled in a near field manner that is a function of the electromagnetic distance between them. Other apparatus, methods, and systems for providing electromagnetic compression are disclosed. In some approaches the electromagnetic compression is achieved with metamaterials. In some approaches the electromagnetic compression reduces the spatial extent of an antenna near field.

3 citations


Cited by
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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

Journal ArticleDOI
14 Aug 2003-Nature
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

Journal ArticleDOI
06 Apr 2001-Science
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

Journal ArticleDOI
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

Journal ArticleDOI
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