Concept

Effet Kerr

Publications associées (200)

Digital Holographic Microscopy Applied to Diffraction Tomography of a Cell Refractive Index

Christian Depeursinge, Tristan Colomb, Etienne Cuche, Pierre Marquet, Florian Charrière

We present a approach of 3-dimensional refractive index tomography of biological specimen, based on the high accuracy phase measurement provided by Digital Holographic Microscopy, recorded for a complete rotation of the specimen in the setup. ...

OSA2006

Structure and magnetism of atomically thin Fe layers on flat and vicinal Pt surfaces

Klaus Kern, Harald Brune, Stefano Rusponi, Pietro Gambardella, Violetta Sessi

Ultrathin Fe films on Pt substrates have been investigated under ultrahigh vacuum conditions by scanning tunneling microscopy, low energy electron diffraction, magneto-optical Kerr effect, x-ray magnetic circular dichroism measurements, and Kerr microscopy ...

2006

Nanofluidic tuning of photonic crystal circuits

Demetri Psaltis

By integrating soft-lithography-based nanofluidics with silicon nanophotonics, we demonstrate dynamic, liquid-based addressing and high Δn/n(∼0.1) refractive index modulation of individual features within photonic structures at subwavelength length scales. ...

2006

Femtosecond holography in lithium niobate crystals

Demetri Psaltis

Spatial gratings are recorded holographically by two femtosecond pump pulses at 388 nm in lithium niobate (LiNbO3) crystals and read out by a Bragg-matched, temporally delayed probe pulse at 776 nm. We claim, to our knowledge, the first holographic pump-pr ...

2005

Enhanced temporal resolution in femtosecond dynamic-grating experiments

Demetri Psaltis

Recording of gratings by interference of two pump pulses and diffraction of a third probe pulse is useful for investigating ultrafast material phenomena. We demonstrate, in theory and experiment, that the temporal resolution in such configurations does not ...

2005

Femtosecond holography

Demetri Psaltis, Ye Pu

We present a holographic recording technique with 150 femtosecond time resolution. This technique allows us to capture either a single hologram with fine spatial resolution (4μm), or a time-sequence of multiple holograms with reduced spatial resolution in ...

2005

Dynamics of filament formation in a Kerr medium

Demetri Psaltis, Ye Pu

We have studied the large-scale beam breakup and filamentation of femtosecond pulses in a Kerr medium. We have experimentally monitored the formation of stable light filaments, conical emission, and interactions between filaments. Three major stages lead t ...

2005

Visualization of optical pulse filamentation by femtosecond time-resolved optical polarigraphy

Demetri Psaltis, Ye Pu

We have observed the filamentation of optical pulses in carbon disulfide(CS2) using femtosecond time-resolved optical polarigraphy(FTOP)1. A pump-probe setup is used to capture the propagation of a 150 femtosecond laser pulse in CS2. The probe pulse propag ...

2005

Self-organization of spatial solitons

Demetri Psaltis, Ye Pu

We present experimental results on the transverse modulation instability of an elliptical beam propagating in a bulk nonlinear Kerr medium, and the formation and self-organization of spatial solitons. We have observed the emergence of order, self organizat ...

2005

Fabrication of vertical digital silicon optical micromirrors on suspended electrode for guided-wave optical switching applications

Philippe Renaud, Cyrille Hibert, Philippe Flückiger, Roland Guerre

This paper presents a novel technological and design study of optical guided- wave MicroElectroMechanical Systems (MEMS) switch. We work on a concept of hermetic assembly in which a MEMS wafer is covered (top-down) by a crossing optical waveguide wafer. Th ...

2005

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