Cambridge 7th to 9th September
article posted 10 Mar 2015
Professor Efstratios I. Kamitsos is the Director of the Theoretical and Physical Chemistry
Institute, part of the National Hellenic Research Foundation in Athens.
Second harmonic generation in oxide glasses by electro-thermal poling
Efstratios I Kamitsos, N.S. Tagiara, D. Palles, E.D. Simandiras
Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation,
48 Vassileos Constantinou Ave., 116 35 Athens, Greece
While ferroelectric crystalline materials are used widely in photonics, there is currently
intensive research towards exploring new materials with sufficient and stable non-linear
optical (NLO) properties. Homogeneous glasses do not exhibit even-order optical
response like second harmonic generation (SHG) due to their centrosymmetric nature.
However, post-synthesis treatments like electro-thermal poling may induce SHG in glasses.
The effects of electro-thermal poling as well as the microscopic mechanisms associated
with the poling process are not well understood at present, and this makes the full
exploitation of glasses in photonics difficult. To progress in this direction, we investigate
by electro-thermal poling different Na ion-containing oxide glasses to establish correlations
between structure/chemistry and NLO response. Results obtained by micro-Raman and
infrared spectroscopy on poled glasses will be presented and discussed.
Support of this work by the General Secretariat for Research and Technology (Greece),
through the POLYNANO?KRIPIS project, is gratefully acknowledged.