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Onde longitudinale

Publications associées (371)

Optical properties of microfabricated fully-metal-coated near-field probes in collection mode

A study of the optical properties of microfabricated, fully-metal-coated quartz probes collecting longitudinal and transverse optical fields is presented. The measurements are performed by raster scanning the focal plane of an objective, focusing azimuthal ...

2005

Tomographie acoustique du Léman

Xavier Falourd

The main objective was to show that the acoustic tomography constitutes a new method to investigate the main hydrodynamical processes of the lake of Geneva. The work is based of the various related fields to the tomography, namely : acoustic wave propagati ...

EPFL2005

Device for dispensing microfluidic droplets, particularly for cytometry

Philippe Renaud

The invention relates to a device for dispensing droplets comprising a first channel (8, 10), known as the main channel, for circulating a first liquid flow, a second channel (12, 13) for circulating fluid, forming an intersection area (27) with the first ...

2005

On the coupling and transmission of transverse and longitudinal fields into fully metal-coated optical nano-probes

Hans Peter Herzig, Toralf Scharf, Laure Aeschimann

Fully-metal-coated near-field optical probes, based on a cantilever design, have been studied theoretically and experimentally. Numerical simulations prove that these structures allow non-zero modal emission of the electromagnetic field trough a 60 nm thic ...

2005

On the long-term behavior of meandering rivers

Paolo Perona

In spite of notable advances in the description of river morphodynamics, the long-term dynamics of meandering rivers is still an open question, in particular, regarding the existence of a possible statistical steady state and its scaling properties induced ...

American Geophysical Union2005

Optical properties of nano-structured materials studied by means of interferometric techniques

In this thesis work we avail ourselves of optical interferometric techniques for the study of the optical properties of nano-structured materials. As a first step, we set up a multiple heterodyne scanning probe optical microscope (MH-SPOM). This apparatus ...

Institut de Microtechnique, Université de Neuchâtel2005

Collection of transverse and longitudinal fields by means of apertureless nanoprobes with different metal coating characteristics

Hans Peter Herzig, Laure Aeschimann

The coupling and transmission of transverse and longitudinal fields into apertureless microfabricated near-field optical probes is investigated. Two kinds of probes with different metal coating roughness are considered. Transverse and longitudinal field di ...

2004

Direct piezoelectric effect in relaxor-ferroelectric single crystals

Nava Setter, Dragan Damjanovic, Matthew Davis

Direct measurements of longitudinal (d(33)) and transverse (d(31)) piezoelectric coefficients have been made on cuboid samples of 001-poled 0.955Pb[Zn1/3Nb2/3]O-3-0.045PbTiO(3) (PZN-4.5PT) and 0.68Pb[Mg1/3Nb2/3]O-3-0.32PbTiO(3) (PMN-32PT) single cryst ...

2004

Comparative analysis and modeling of both standing and travelling wave ultrasonic linear motor

Yves Perriard, José Fernandez Lopez

A comparative study on the two different kinds of ultrasonic linear motors (ULM), standing and travelling wave types, is described. Analytical modeling using the wave theory and the contact mechanisms is presented. The former is used to describe the wave p ...

2003

Wave propagation in nonlocal coupled oscillators with noise

The onset of undamped wave propagation in noisy self-oscillatory media is identified with a Hopf bifurcation of the corresponding effective dynamical system obtained by properly renormalizing the effect of noise. We illustrate this fact on a dense array of ...

2003

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