Plasma-Induced Generation of Optically Active Defects in Glasses

Plasma-Induced Generation of Optically Active Defects in Glasses

Christoph Gerhard

Abstract. In this contribution, the modification of optical and electrical properties of glasses by plasma treatment is introduced. The presented method is based on pulsed dielectric barrier discharge plasmas which are operated with hydrogenous working gases where atomic and excited hydrogen species are generated within the plasma by electron impact-induced dissociation. These species initiate a notable modification of the glass network. As a result, the transmission characteristics and associated parameters of plasma treated glass are altered. The impact of plasma treatment on the chemical composition of optical glasses as well as the accompanying changes in optical properties are presented. As determined via secondary ion mass spectroscopy, oxygen is removed and hydrogen is implanted into the glass bulk material. This leads to the formation of oxygen vacancies such as E’-centers on the one hand and the generation of hydrogen centers on the other hand. Such glass modifications lead to a drastic increase in absorption and index of refraction as ascertained via UV/VIS-spectroscopy. Some potential applications of these plasma-induced effects are suggested.

Glasses, Plasma Treatment, Glass Defects, Optical Properties

Published online 2/25/2020, 8 pages

Citation: Christoph Gerhard, Plasma-Induced Generation of Optically Active Defects in Glasses, Materials Research Proceedings, Vol. 16, pp 38-45, 2020


Part of the book on Photonics and Photoactive Materials

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