Speaker: Virginie Nazabal (University of Rennes, host: Jóvári Pál)
Title: Amorphous chalcogenides for infrared sensing
Date: Tuesday, 1 october 2024. 10:00
Place: KFKI Campus, Bldg 1, Conference room
Abstract:
The sensor development for in situ detection of organic molecules in water using an optical method is a broad environmental challenge. Chalcogenide glasses have attracted attention for sensing applications due to their high transparency in the infrared range, their ability to be fabricated into thin films by PVD and to be processed into integrated photonic components by photolithography and etching. We will present the development of a chalcogenide-based mid-infrared platform dedicated to mid-infrared spectroscopy using evanescent waves. The choice of the chalcogenide glass composition, the synthesis of chalcogenide films by RF magnetron sputtering, the structural, morphological, topographic and optical characterization of the thin films, the patterning of the films using photolithography and reactive ion etching, the optical losses and the surface functionalization by a hydrophobic polymer of the chalcogenide thin films will be presented. This study represents a step towards the development of an optical sensor in the MIR spectral range using chalcogenide materials for the detection of organic molecules in water.
