Rabu, 26 Mei 2010

[France] Doctoral Position in Laser-Assisted Transformation of Materials at Centre National de la Recherche Scientifique (CNRS) and Université Jean Mo

Laboratoire Hubert Curien, CNRS UMR 5516
Université Jean Monnet, Saint Etienne, France

Research project: Photoinscription of photonic structures by spatio-temporally tailored ultrafast laser radiation

Abstract
The `Optics and Photonics` department at the Laboratoire Hubert Curien, CNRS UMR 5516, Saint Etienne, France is currently seeking a doctoral candidate for its research activities. Applications are invited for a doctoral position in laser-assisted transformation of materials on micro- and nano- scales for optical applications that may open in November 2010. The position is limited to three years.



Environment
Hubert Curien Laboratory is a mixed research unit, jointly run by the `Centre National de la Recherche Scientifique - CNRS` and the Jean Monnet University. The proposed subject is at the interface between two main research axes of the `Optics and Photonics` department; laser-matter interaction and micro/nanostructuring. The Ultrafast laser platform located at the Hubert Curien Laboratory hosts state-of-the-art equipment for beam engineering, laser processing, and process characterization.

Project
The proposed subject involves the development and employment of automated and reconfigurable spatio-temporal laser irradiation techniques for functionalization of bulk optical materials and nonlinear photoinscription of complex photonics structures. Overcoming limitations of standard techniques, the objective is to design user-defined structural modifications in band-gap materials with predictable optical properties by taking advantage of adaptive irradiation systems and intelligent control loops. This serves for fabricating complex 3D optical instrumentation in emerging fields, e.g. integrated infrared optics for astrophotonics using engineered ultrashort laser pulses. Within this context, adaptive optics permits spatio-temporal design of laser pulses and facilitates self-improving control on structural transitions in materials by regulating the energy feed-through, with effect on refractive index changes. The dynamic control over the energy delivery allows a significant upgrade in the quality of the laser-induced structures and enables precise refractive index engineering, delivering in turn new insights on the interaction mechanisms. The technique puts forward two perspectives: engineering aspect, using the potential of designing excitation geometry, and phenomenological aspect, related to controlling of physical phenomena. A specific accent is put on developing vectorial beam engineering concepts that allows flexible, parallel, error-free 3D processing of the optical materials.

Job description
The requested position includes as tasks the development of real-time imaging and spectroscopic methods to observe the progress of laser-induced modifications in transparent materials, as well as the analysis of the excitation/relaxation events on short spatial and temporal scales. The question of controlling the subsequent material modifications usingadaptive pulse spatio-temporal manipulation methods will be addressed. This knowledge will be used for fabricating 3D devices with optical functionalities.

We are looking for candidates with the following profile. Candidates should have a MSc degree in physics or engineering, and show interest for interdisciplinary work in the field of laser-material interactions. The application should be supported by sound academic records and recommendation letters. Expertise is required in the following areas: ultrafast laser- material interactions, condensed matter, microscopy, solid-state physics, spectroscopy, ultrafast optics, linear and nonlinear optics, laser-induced ultrafast phenomena, photonics. Programming skills and a good command of English are also required.

Payment: Fellowship of the Ministry of Education
Duration: 36 months,
Application Deadline: June 16th, 2010.

Contact (with customary documents):
Dr. Razvan Stoian
Email: razvan.stoian@univ-st-etienne.fr

Website link:
http://portail.univ-st-etienne.fr/LABTRT/0/fiche___laboratoire/
http://edsis.univ-st-etienne.fr/index.php?url=S65dPKbaFJKt

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