Concept

Speed of light

Related publications (326)

Miniaturized optical tweezers based on high-na micro-mirrors

René Salathé, Fabrice Merenda, Johann Rohner

The invention relates to an optical tweezer device including at least one light source (2) and one three-dimensional optical trap (9,10), said optical trap comprising one focusing micro-mirror (7) which is adapted to reflect and focus at least a portion of ...

2009

Light transport regimes in slow light photonic crystal waveguides

Romuald Houdré, Hua Zhang, Nicolas Le Thomas, Jana Jágerská, Vasily Zabelin

The dispersive properties of waves are strongly affected by inevitable residual disorder in man-made propagating media, in particular in the slow wave regime. By a direct measurement of the dispersion curve in k space, we show that the nature of the guided ...

2009

Light Transport and Limits of Slow Light in Real Photonic Crystal Structures in the Presence of Residual Disorder

Romuald Houdré, Hua Zhang, Nicolas Le Thomas, Jana Jágerská

We experimentally investigate the effect of residual disorder on the dispersion curve of light near a band edge. A Fourier space imaging technique accurately distinguishes the propagating regime from diffusive transport and evanescent regime in planar phot ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

Endoscopic low coherence interferometry applied to tri-dimensional contouring of upper airways

Yves Delacrétaz

This thesis presents a novel approach for optical tri-dimensional contouring, requiring only one acquisition to extract a contour depth. It is based on an interferometric setup, using a reduced coherence light source, and is fully adaptable to endoscopic p ...

EPFL2009

Slow Light and Fast Light in Optical Fiber

Luc Thévenaz

Fiber slow light systems are at a turning point moving from a laboratory research to real applications. The possibility to shape the spectral resonance in Brillouin slow light leads to innovative solutions and makes possible the realization of optimized co ...

Optical Society of America2009

WO3-Fe2O3 Photoanodes for Water Splitting: A Host Scaffold, Guest Absorber Approach

Michael Graetzel, Kevin Sivula, Florian Le Formal

Solar hydrogen production via watersplitting with hematite (Fe2O3) has been limited by poor light absorption and a small hole diffusion length. These drawbacks can be overcome by using a high-surface-area host to support a thin layer of hematite-allowing p ...

2009

A New Closed-Form Solution to Light Scattering by Spherical Nanoshells

Juan Ramon Mosig, Olivier Martin

Light or electromagnetic wave scattered by a single sphere or a coated sphere has been considered as a classic Mie theory. There have been some further extensions that were made further based on the Mie theory. Recently, a closed-form analytical model of t ...

2009

Impact of the residual disorder on the slow light regime in 1D and 2D photonic crystals structures

Romuald Houdré, Nicolas Le Thomas

We experimentally investigate the effect of residual disorder on the dispersion curve of light near a band edge. A Fourier space imaging technique accurately distinguishes the propagating regime from evanescent regime in planar photonic crystal. (C) 2009 O ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

Potentialities of slow and fast light in optical fibers

Luc Thévenaz, Sang Hoon Chin

The ubiquitous role of optical fibers in modern photonic systems has stimulated research to realize slow and fast light devices directly in this close-to-perfect transmission line. Recent progress in developing optically-controlled delays in optical fibers ...

SPIE2009

Fundamental Diagram of Traffic Flows on Urban Roads Local Versus Whole-Link Approaches

Fundamental diagrams of traffic flow variables have been quite useful in determining freeway operations quality. However, they are usually not used for that purpose on urban roads. This work is an approach toward utilizing the fundamental diagram on urban ...

National Academy of Sciences2009

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