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Journal of Materials Science and Nanotechnology | Volume: 3
March 20-21, 2019 | London, UK
Materials Science and Materials Chemistry
2
nd
International Conference on
S
urface engineering of optical glasses has been performed
by thermal poling and the correlation between the
local modification of the glass composition and the local
structure of the field-induced modified surface has been
investigated and controlled. Surface mechanical properties
and durability can be affected, as well as optical properties,
leading to numerous potential applications for sensing.
The original approach is to spatially control the glass
surface electro-activation at the microscopic level. Such
a method allows manipulation of high static electric fields
implemented within the glassy matrix just below the surface
using a designed micro-patterned electrode. Preliminary
results demonstrate the capability of this thermo-electrical
imprinting process to modify the sign and the strength of
the surface potential of glass down to the micrometer scale.
A modeling approach has been proposed enabling to tailor
the geometry and distribution of the frozen-in electric field.
These preliminary results are unique and open the way for
an electro-active surface chemical engineering on materials
of great interest for applications in the Visible-IR domain
like GRIN lenses or. Bio-selective reactivity, for respectively
optical and biosensing.
Speaker Biography
During 30 years in the University of Bordeaux, Fargin Evelyne has focused her research
interests on - Nonlinear optical properties of glasses- Surface Glass structuring by poling
- Heavy glass oxides for fiber applications- Laser-induced defects in glasses - Multiscale
crystallization in amorphous transparent glass materials (over 120 publications, 3 patents,
H-index=21). She has International Involvement on Research and Education programs
in the University of Bordeaux as International Partnership Coordinator of the Lasers and
Photonics Graduate School in Bordeaux EUR LIGHTST and Training Coordinator of the
LaPHiA Center of Photonics.
e:
Evelyne.fargin@u-bordeaux.frFargin Evelyne
University of Bordeaux, France
Glass surface engineering by thermal poling: Chemistry under field and design of surface electro-
activity and optical properties for sensing