Laser Ablation Of As_χse_(100-χ) Chalcogenide Glasses: Plume Investigations

摘要

The use of amorphous chalcogenides offers advantages such as remarkable optical properties like a wide transmission window (～1-20 μm) depending upon composition, making them suitable for sensitive detection of clinical or environmental changes. They also present interesting high (non)linear refractive indices, photorefractive effects, and other properties interesting for wavelength conversion, all-optical switching or modulation, Raman and parametric amplification, laser sources for mid-IR, etc. Slab waveguides based on chalcogenide amorphous films with good adherence and controlled composition can be obtained using pulsed laser deposition allowing to design and to manufacture complex optical functions on waveguides within a small and compact chip. The aim of this work is to characterize the ejection plume obtained by laser ablation of As_χSe_(100-χ) samples in order to get some insight on the process involved for optimizing the pulsed laser deposition process. The dynamics of the plume has been systematically investigated by ICCD camera fast imaging and space- and time-resolved optical emission spectroscopy for samples of various compositions.