Abstract
Novel magneto-optical silica glass with semiconductor EuS nanocrystals (NCs) has been reported. The silica glass with EuS NCs is synthesized by the hydrolysis reaction with a ligand exchange process (from NH2-group to OH-group). The silica framework around EuS NCs provides thermo-stable structure under 500°C. The glass material also shows effective magneto-optical properties, Faraday rotation, in the visible region (400–700nm). The positive peak of Faraday rotation spectrum is blue-shifted in comparison with traditional EuS NCs in PMMA polymer. The effective peak-shift of Faraday rotation is caused by ligand change on EuS NCs surface (Nephelauxetic effect). The EuS-silica nanoglass composite with thermally stable structure would have potential applications as an optical isolator with a high-power laser.
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