Amorphous oxides for interference coatings of ultrastable optical cavities
Carmen S. Menoni
Department of Electrical & Computer Engineering,
Chemistry and School of Advanced Materials Discovery
Colorado State University
Présentation en anglais
Vidéoconférence, Zomm #: 83123208456 (Zoom link)
Lorsque demandé, indiquer: miroirs
Abstract: Glassy amorphous oxides are fascinating materials in that their amorphous nature provides for enormous functionality. In their thin film form, vapour-deposited amorphous oxides are the building blocks of interference coatings ubiquitous in optical systems. In this talk, I will describe the synthesis and characterization of amorphous oxides by ion beam sputtering. I will describe how it is possible to tailor the structural, optical and mechanical properties to realize thin films with ultra-low internal friction for interference coatings of gravitational wave detectors. The state-of-the-art of multilayer dielectric structures for this application and their future demands will be discussed.
Bio: Dr. Carmen S. Menoni is University Distinguished Professor in the Department of Electrical and Computer Engineering. She also holds appointments in the Department of Chemistry, the School of Biomedical Engineering and the School of Advanced Materials Discovery. Prof. Menoni’s expertise is in optics and material science. Her current research focuses on the synthesis of amorphous thin film materials by ion beam sputtering for the implementation of novel coating architectures for photonics applications. Through a combination of fundamental understanding of the optical and structural properties of amorphous oxides and device engineering, Prof. Menoni's research is advancing the state-of-art in interference coatings for ultra-high intensity lasers. Menoni is a member of the international LIGO (Laser Interferometer Gravitational Wave Observatory) collaboration where her work on thin film amorphous oxides is contributing to understand the origin of coating’s internal friction that limits the sensitivity of the interferometers. Menoni is also actively involved in using high-brightness coherent beams of light of wavelengths between 10-50 nm for optics applications such as nanoscale imaging, and chemical composition mapping. Her work is described in over 300 archival publications and has been presented in 450 conference talks, including 120 invited presentations, at national and international conferences. Prof. Menoni is Fellow of the Institute of Electrical & Electronic Engineers (IEEE), the American Physical Society (APS), the Optical Society of America (OSA), the American Association for the Advancement of Science (AAAS) and the SPIE. Prof. Menoni is currently President of the IEEE Photonics Society.
Cette conférence est présentée par le RQMP.