evanescent modes

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• Evanescent wave — Schematic representation of evanescent waves propagating along a metal dielectric interface. The charge density oscillations, when associated with electromagnetic fields, are called surface plasmon polariton waves. The exponential dependence of… …   Wikipedia

• Evanescent wave coupling — In optics, evanescent wave coupling is a process by which electromagnetic waves are transmitted from one medium to another by means of the evanescent, exponentially decaying electromagnetic field. Coupling is usually accomplished by placing two… …   Wikipedia

• Superlens — A superlens, super lens or perfect lens is a lens which uses metamaterials to go beyond the diffraction limit. The diffraction limit is an inherent limitation in conventional optical devices or lenses.[1] In 2000, a type of lens was proposed,… …   Wikipedia

• Beam propagation method — (BPM) refers to a computational technique in Electromagnetics, usedto solve the Helmholtz equation under conditions of a time harmonic wave. BPM works under slowly varying envelope approximation, for linear and nonlinear equations.The beam… …   Wikipedia

• Günter Nimtz — (1936) is a German physicist. Working at the 2nd Physics Institute at the University of Cologne ( Universität zu Köln ) in Germany, he has been conducting experiments that purport to show that under certain conditions, particles may travel faster …   Wikipedia

• Chu-Harrington limit — The Chu Harrington limit or Chu limit sets a lower limit on the Q factor for a small radio antenna. The definition of a small antenna is one that can fit inside a sphere . For a small antenna the Q is proportional to the reciprocal of the volume… …   Wikipedia

• Günter Nimtz — (* 22. September 1936 in Berlin) ist ein deutscher Physiker, der vor allem durch seine Versuche zum superluminalen (überlichtschnellen) Tunneln bekannt geworden ist. Inhaltsverzeichnis 1 Leben 2 Forschung am Tunneleffekt 3 Kritik …   Deutsch Wikipedia

• Optical tweezers — (originally called single beam gradient force trap ) are scientific instruments that use a highly focused laser beam to provide an attractive or repulsive force (typically on the order of piconewtons), depending on the refractive index mismatch… …   Wikipedia

• Non-Radiative Dielectric waveguide (NRD) — Figure 1 Contents 1 Introduction 2 The dispersion relation in the NRD wave …   Wikipedia

• LIGNES DE TRANSMISSION — On appelle ligne de transmission un ensemble de conducteurs cylindriques à génératrices parallèles qui assure le transport de l’énergie électrique entre deux points donnés. Les lignes de transmission présentent une diversité très grande selon les …   Encyclopédie Universelle

• Total internal reflection — The larger the angle to the normal, the smaller is the fraction of light transmitted, until the angle when total internal reflection (blue line) occurs. (The color of the rays is to help distinguish the rays, and is not meant to indicate any… …   Wikipedia