Concept

Gradient-index optics

Related publications (103)

Ultra-fast writing of self-organized bubble networks using femtosecond laser exposure in the cumulative regime

Femtosecond pulses focused in glass substrate induces various modifications in the material depending on the fluence level and laser exposure conditions. Upon increasing pulse energies above the energy threshold for non-linear absorption, femtosecond laser ...

2011

Multiple electron cyclotron power deposition location tracking by break-in-slope analysis in TCV plasmas

Timothy Goodman, Jean-Marc Moret, Federico Alberto Alfredo Felici, Joan Decker, Antoine Pochelon, James Paley, Loïc Curchod

Modulation of the amplitude of externally injected electron cyclotron (EC) power is a frequent method used to determine the radial power deposition profile in fusion plasmas. There are many tools to analyze the plasma response to the power modulations unde ...

Institute of Physics2011

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2011

Diffraction tomography for biological cells imaging using digital holographic microscopy

Christian Depeursinge, Nicolas Pavillon, Cristian Arfire

Many biological objects are mainly transparent and weakly scattering, thus a promising (and already widely used) way of imaging them consists in considering optical refractive index variations. The method proposed here permits 3D imaging of the refractive ...

SPIE2010

The formation of short Bragg gratings in SMF-28e non-hydrogen loaded pristine fibre using a cw Ar+ laser operating at 244 nm is reported. Mean refractive index changes >10-3 were obtained for a laser intensity of about 513 W/cm2 and a total dose of 5.9 MJ/ ...

Institution of Engineering and Technology2010

Couches minces nanoporeuses pour la réalisation de dispositifs optiques

Gaëtan Wicht

The physical-chemical properties of polymer films can be modified by embedding inorganic materials (e. g. inorganic nanoparticles) into the polymer matrix. Depending both on the material properties (e. g. nanoparticles concentration) and on the fabrication ...

EPFL2010

Sub-wavelength probing and modification of photonic crystal nano-cavities

Laurent Balet, Massimo Gurioli

In this work we present a sizeable and reversible spectral tuning of the resonances of a two-dimensional photonic crystal nanocavity by exploiting the introduction of a sub-wavelength size glass tip. The comparison between experimental near-field data and ...

2010

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The scaling of turbulence-driven heat transport with system size in magnetically confined plasmas is reexamined using first-principles based numerical simulations. Two very different numerical methods are applied to this problem, in order to resolve a long ...

The American Physical Society2010

There has been a very strong development of the sensors based on surface plasmon resonance during the last thirty years, mostly for biological and biomedical applications. If the first experiments in this field were carried out at the beginning of the 20t ...

EPFL2010

Two-dimensional optics on silicon nitride multilayer: Refraction of Bloch surface waves

Hans Peter Herzig, Libo Yu, Tristan Sfez, Francesco Michelotti

When properly designed, a dielectric multilayer can sustain Bloch surface waves (BSWs). Using a multiheterodyne scanning near-field optical microscope that resolves phase and polarization, we will show that a thin dielectric structure deposited on the mult ...

American Institute of Physics2010

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