Concept

Waveguide

Publications associées (237)

Handling technology of mega-watt millimeter-waves for optimized heating of fusion plasmas

Olivier Sauter, Timothy Goodman, Federico Alberto Alfredo Felici

Millimeter-wave components were re-examined for high power (Mega-Watt) and steady- state (greater than one hour) operation. Some millimeter-wave components, including waveguide joints, vacuum pumping sections, power monitors, sliding waveguides, and inject ...

International Microwave Power Institute2009

Introducing symmetry conditions in the integral equation technique applied to quasi-waveguide structures

Juan Ramon Mosig, Michael Mattes, Laleh Golestanirad

Integral Equation (IE) formulation solved by Method of Moments may be used efficiently to address the problem of quasi-waveguide structures, i.e. structures consisting of a main waveguide with a constant cross section that may bear an arbitrary number of p ...

2009

Modes of a plasma-filled waveguide determined by a numerical hp method

Kurt Appert

We present the application of the recent physics-conforming COOL method [2,4] to the eigenvalue problem of a cylindrical waveguide filled with unmagnetized plasma. Using the Fourier transform only along the waveguide and not in poloidal direction, this is ...

2009

Phononic properties of hexagonal chiral lattices

Alessandro Spadoni

The manuscript reports the outcome of investigations on the phononic properties of a chiral cellular structure. The considered geometry features in-plane hexagonal symmetry, whereby circular nodes are connected through six ligaments tangent to the nodes th ...

Elsevier2009

Localized Plasmonic Control of Extraordinary Light Tranmission in Rectangular Coaxial Aperture Arrays at Mid-IR

Hatice Altug, Shyamsunder Erramilli, Xiaoyan Wang

It has been theoretically predicted and experimentally shown that circular coaxial aperture arrays have higher transmissivities with respect to simple circular ones. This observation is mainly attributed to the propagating waveguide modes supported by the ...

SPIE-INT SOC OPTICAL ENGINEERING2009

High quality superconducting NbN thin films on GaAs

Francis Lévy, Alessandro Surrente, Francesco Marsili, Alessandro Gaggero

A very promising way to increase the detection efficiency of nanowire superconducting single-photon detectors (SSPDs) consists in integrating them with advanced optical structures such as distributed Bragg reflectors (DBRs) and optical waveguides. This req ...

2009

Complete compensation of pulse broadening in an amplifier-based slow light system using a nonlinear regeneration element

Luc Thévenaz, Sang Hoon Chin

We experimentally demonstrate complete compensation of pulse broadening in an amplifier-based slow light system. The configuration of the delay line basically consists of two stages: a conventional Brillouin slow light system and a nonlinear regeneration e ...

2009

Evaluation of pH indicator-based colorimetric films for ammonia detection using optical waveguides

Nico de Rooij, Danick Briand, Jérôme Courbat

The evaluation of colorimetric films for the detection of low concentrations of gaseous ammonia in a waveguide configuration is presented. They were composed of a pH indicator selective to NH3 embedded in a polymeric matrix and deposited on an optical wave ...

2009

Pseudosurface acoustic waves in hypersonic surface phononic crystals

We present a theoretical framework allowing to properly address the nature of surfacelike eigenmodes in a hypersonic surface phononic crystal, a composite structure made of periodic metal stripes of nanometer size and periodicity of 1 mu m, deposited over ...

2009

Influence of residual disorder on the anticrossing of Bloch modes probed in k space

Romuald Houdré, Nicolas Le Thomas, Vasily Zabelin

We retrieve the dispersion properties of photonic crystal waveguides near the band edge with high experimental accuracy. The dispersion diagram of the waveguide modes in the complex-valued plane is directly measured in the far ﬁeld by using a Fourier space ...

2008

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