ORCID Profile
0000-0002-0747-3076
Current Organisation
Friedrich-Schiller-Universität Jena
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Publisher: Springer Science and Business Media LLC
Date: 09-10-2012
DOI: 10.1038/NCOMMS2109
Publisher: Wiley
Date: 12-04-2011
Abstract: Magneto‐optical glasses are of considerable current interest, primarily for applications in fiber circuitry, optical isolation, all‐optical diodes, optical switching and modulation. While the benchmark materials are still crystalline, glasses offer a variety of unique advantages, such as very high rare‐earth and heavy‐metal solubility and, in principle, the possibility of being produced in fiber form. In comparison to conventional fiber‐drawing processes, pressure‐assisted melt‐filling of microcapillaries or photonic crystal fibers with magneto‐optical glasses offers an alternative route to creating complex waveguide architectures from unusual combinations of glasses. For instance, strongly diamagnetic tellurite or chalcogenide glasses with high refractive index can be combined with silica in an all‐solid, microstructured waveguide. This promises the implementation of as‐yet‐unsuitable but strongly active glass candidates as fiber waveguides, for ex le in photonic crystal fibers.
Publisher: OSA
Date: 2013
Publisher: Research Square Platform LLC
Date: 05-07-2023
DOI: 10.21203/RS.3.RS-3118468/V1
Abstract: Silicate glasses with metallic nanoparticles (NPs) have been of intense interest in art, science and technology as the plasmonic properties of the metallic NPs equip glass with light modulation capability. The so-called striking technique has enabled precise control of the in-situ formation of metallic NPs in silicate glasses for applications from coloured glasses to photonic devices. Over the past two decades, there has been a large amount of work to adapt the striking technique to form gold or silver NPs in tellurite glasses that exhibit the unique combination of easy fabrication, low phonon energy, wide transmission window and high solubility of luminescent rare earth ions. Nevertheless, the control of the in-situ formation of metal NPs and hence their plasmonic features in tellurite glasses has remained insufficient for photonic applications. Here, we first uncover the challenges of the traditional striking technique to create gold NPs in tellurite glass. Then, we demonstrate precise control of the size and concentration of gold NPs in tellurite glass by developing new approaches to both steps of the striking technique: a controlled gold crucible corrosion technique to incorporate gold ions in tellurite glass and a novel powder reheating technique to subsequently transform the gold ions to gold NPs. Using the Mie theory, the size, size distribution and concentration of the gold NPs formed in tellurite glass were determined from the plasmonic properties of the NPs. This fundamental research provides guidance to designing and manipulating the plasmonic properties in tellurite glass for photonics research and applications.
Publisher: Institution of Engineering and Technology
Date: 2013
DOI: 10.1049/CP.2013.1361
Publisher: The Optical Society
Date: 27-08-2013
DOI: 10.1364/OME.3.001488
No related grants have been discovered for Lothar Wondraczek.