Publications associées à Propagation of the Lower Hybrid wave in a density fluctuating SOL

Weyl sums and the Lyapunov exponent for the skew-shift Schrödinger cocycle

We study the one-dimensional discrete Schrödinger operator with the skew-shift potential

2\lambda\cos\left(2\pi \left(\binom{j}{2} \omega+jy+x\right)\right)

. This potential is long conjectured to behave like a random one, i.e., it is expected to produce ...

2018

Light fields behind microstructures: study of the Babinet-principle in the Fresnel regime

Hans Peter Herzig, Toralf Scharf, Myun Sik Kim, Krishnaparvathy Puthankovilakam

The Babinet’s principle is a general theorem that holds for electromagnetic waves and is often applied to diffraction of light. Diffraction pattern of a body and that of the complement body are compared and the sum of both radiation patterns must be the sa ...

Spie-Int Soc Optical Engineering2017

A vector field method on the distorted Fourier side and decay for wave equations with potentials

Joachim Krieger, Roland Donninger

We study the Cauchy problem for the one-dimensional wave equation

\partial_t^2 u(t,x)-\partial_x^2 u(t,x)+V(x)u(t,x)=0.

The potential

V

is assumed to be smooth with asymptotic behavior

V(x)\sim -\tfrac14 |x|^{-2}\mbox{ as } |x|\to \infty.

...

2016

Interaction between the Lower Hybrid wave and density fluctuations in the scrape-off layer

Joan Decker

In the present paper, the perturbation of the launched power spectrum of the Lower Hybrid wave at the separatrix by electron density fluctuations in the scrape-off layer is investigated. Considering a slab geometry with magnetic field lines parallel to the ...

Amer Inst Physics2015

Chirality of structure and magnetism in the magnetoelectric compound Cu2OSeO3

Henrik Moodysson Rønnow, Arnaud Magrez, Jonathan White, Krunoslav Prsa, Ping Huang

Small-angle diffraction of polarized neutrons and resonant contribution to diffraction of synchrotron radiation have been applied to prove chirality of the crystal and magnetic structures of the magnetoelectric insulator Cu2OSeO3. Similarly to other chiral ...

Amer Physical Soc2014

Functional and Structural Imaging with Optical Coherence Microscopy

Arno Pino Bouwens

Fluorescence microscopy techniques are well established research tools and have proven their use in a large variety of biomedical applications. Microscopic molecular contrast is achieved by imaging fluorescent dyes that bind specifically to a molecule of i ...

EPFL2013

Talbot images of wavelength-scale amplitude gratings

Hans Peter Herzig, Toralf Scharf, Myun Sik Kim

By means of experiment and simulation, we achieve unprecedented insights into the formation of Talbot images to be observed in transmission for light diffracted at wavelength-scale amplitude gratings. Emphasis is put on disclosing the impact and the interp ...

Optical Society of America2012

Fourier optics analysis of grating sensors with tilt errors

Muhammed Fatih Toy, Onur Ferhanoglu

Dynamic diffraction gratings can be microfabricated with precision and offer extremely sensitive displacement measurements and light intensity modulation. The effect of pure translation of the moving part of the grating on diffracted order intensities is w ...

2011

Diffractionless Fourier Domain Microscopy

Theo Lasser, Rainer Leitgeb, Cédric Blatter, Tilman Schmoll

Several methods have been proposed and realized to increase the lateral resolution in microscopy and ultimately to beat the actual diffraction limit as stated by Abbe. Structured illumination for example enhances the lateral resolution by virtually extendi ...

2011

Automatic recovery of missing amplitudes and phases in tilt-limited electron crystallography of two-dimensional crystals

Henning Paul-Julius Stahlberg

Electron crystallography of 2D protein crystals provides a powerful tool for the determination of membrane protein structure. In this method, data is acquired in the Fourier domain as randomly sampled, uncoupled, amplitudes and phases. Due to physical cons ...

American Physical Society (APS)2011

Propagation of the Lower Hybrid wave in a density fluctuating SOL

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Weyl sums and the Lyapunov exponent for the skew-shift Schrödinger cocycle

Light fields behind microstructures: study of the Babinet-principle in the Fresnel regime

A vector field method on the distorted Fourier side and decay for wave equations with potentials

Interaction between the Lower Hybrid wave and density fluctuations in the scrape-off layer

Chirality of structure and magnetism in the magnetoelectric compound Cu2OSeO3

Functional and Structural Imaging with Optical Coherence Microscopy

Talbot images of wavelength-scale amplitude gratings

Fourier optics analysis of grating sensors with tilt errors

Diffractionless Fourier Domain Microscopy

Automatic recovery of missing amplitudes and phases in tilt-limited electron crystallography of two-dimensional crystals

Functional and Structural Imaging with Optical Coherence Microscopy

Talbot images of wavelength-scale amplitude gratings

Weyl sums and the Lyapunov exponent for the skew-shift Schrödinger cocycle

A vector field method on the distorted Fourier side and decay for wave equations with potentials

Chirality of structure and magnetism in the magnetoelectric compound Cu2OSeO3

Light fields behind microstructures: study of the Babinet-principle in the Fresnel regime

Fourier optics analysis of grating sensors with tilt errors

Interaction between the Lower Hybrid wave and density fluctuations in the scrape-off layer

Automatic recovery of missing amplitudes and phases in tilt-limited electron crystallography of two-dimensional crystals

Diffractionless Fourier Domain Microscopy