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Laser-assisted microstructuring for Ti : sapphire channel-waveguide fabrication

Publications associées (34)

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Tunable optofluidic distributed feedback dye lasers

Demetri Psaltis

We demonstrated a continuously tunable optofluidic distributed feedback (DFB) dye laser on a monolithic poly(dimethylsiloxane) (PDMS) elastomer chip. The optical feedback was provided by a phase-shifted higher order Bragg grating embedded in the liquid cor ...

2006

Spinon deconfinement in doped frustrated quantum antiferromagnets

Frédéric Mila

The confinement of a spinon liberated by doping two-dimensional frustrated quantum antiferromagnets with a nonmagnetic impurity or a mobile hole is investigated. For a static vacancy, an intermediate behavior between complete deconfinement (kagome) and str ...

2006

Novel full platinum nanoprobes suitable for biological SPM experiments

Jürgen Brugger, Johannes Steen

We have developed a hybrid scanning probe microscopy sensor consisting of a SU-8 body and full platinum cantilever and tip. The fabrication process is based on surface-micromachining of a silicon wafer, where oxidation sharpened moulds define the tip shape ...

2006

Mechanically tunable optofluidic distributed feedback dye laser

Demetri Psaltis

A continuously tunable optofluidic distributed feedback (DFB) dye laser was demonstrated on a monolithic replica molded poly(dimethylsiloxane) (PDMS) chip. The optical feedback was provided by a phase-shifted higher order Bragg grating embedded in the liqu ...

2006

Plasma breakdown using second-harmonic EC waves in helical devices

Plasma breakdown using second-harmonic electron cyclotron (EC) waves has been studied experimentally in three helical devices, Heliotron J, TJ-II and CHS. Recent technological progress on electron cyclotron heating (ECH) systems enables us to determine wha ...

2006

Combined Al-protection and HF-vapour release process for ultrathin cantilevers

Jürgen Brugger, Giovanni Boero, Schahrazede-Lila Mouaziz

Cantilever-based detection of ultrasmall forces is of great interest for several applications such as magnetic resonance force miscroscopy (MRFM) where an ultrahigh sensitive cantilever is used to detect magnetic resonance in small ensembles of electron or ...

2005

Study of vertical coupled-cavity laser structures

This thesis addresses general aspects of the operation of a coupled-cavity vertical surface-emitting laser (CC-VCSEL) which consists of two active cavities optically coupled and independently electrically pumped. The first two chapters of the thesis deal w ...

EPFL2004

Highly efficient one- and two-cascade Raman lasers based on phosphosilicate fibers

René Salathé, Hans Georg Limberger, Florian Dürr, Marcel Zeller

Characteristics of one-cascade (1.06 double right arrow 1.24 mum) and two-cascade (1.06 double right arrow 1.24 double right arrow 1.48 mum) phosphorus-doped fiber Raman lasers are studied. The cavities of both lasers are formed by Bragg gratings written d ...

2003

Epitaxial growth and optical characterization of BaSO4:Mn6+ layers for novel coherent light sources

Because of the strong electron-phonon coupling of the emitting 3d orbital in transition-metal (TM) ions, 3d systems exhibit luminescence with typically several hundred nm of spectral bandwidth. TM-ion-doped materials are, therefore, of high interest for ap ...

EPFL2003

Light-current characterization of dual-wavelength VCSELs

Jean-François Carlin, Marc Ilegems

The purpose of this paper is to present a detailed characterization of a dual-wavelength VCSEL - the BiVCSEL. This device consists of two active optical cavities, which share a coupling mirror and can be independently electrically pumped. We present the ou ...

SPIE2002