Poling térmico de vidros oxifluoreto: geração de propriedades não-lineares de segunda ordem e modificação de superfície por microimpressão

Resumo

The aim of this work is to make new contributions in the development and experimental implementation of thermal poling of glasses for generation of non-linear responses aiming applications in the microphotonic field. Thermal poling is a technique that involves the application of a strong DC electric field to a glass substrate heated below its glass transition temperature (Tg). Following, a static electric field is frozen inside the glass matrix, breaking its centrosymmetry. This treatment will be used for the development of microphotonic devices, a tunable three-dimensional control of its linear and mainly NLO (second- and third-order) responses is expected. In this sense, the French group has produced important works in the field and mastered the thermal poling technique of glasses, not only to tune linear and non-linear responses in glasses, but also, recent efforts have shown that the treatment was responsible for structural changes as well as surface property modifications at a micrometric scale. This opens up new applications of thermal poling as a mean to design glass substrate for integrated photonic sensors.