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Glasses and Ceramics: Optical Properties and Optical Technologies

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced and Functional Ceramics and Glasses".

Deadline for manuscript submissions: closed (20 August 2022) | Viewed by 3385

Special Issue Editor


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Guest Editor
Department of Glass and Glass-Ceramics, Mendeleev University of Chemical Technology, Miusskaya Sq. 9, 125047 Moscow, Russia
Interests: oxide glasses; glass-based functional materials; nanostructured glasses; laser-induced micromodification of glasses and glass-ceramics; space-selective crystallization

Special Issue Information

Dear Colleagues,

The role of glasses in current science and technology, and especially in optics and photonics, can hardly be exaggerated. Unexcelled transparency and reasonable strength and chemical durability together with low cost, excellent manufacturability, and ability to finely tune physical properties by the continuous variation of chemical compositions make glasses a type of materials of the utmost importance in optical technologies. Glasses can be an excellent host for activators of luminescence and are a unique media allowing for optical fiber production. Hence, they can be regarded as a key element of fiber-optical telecommunication systems and Internet which are essential for the whole of modern civilization. Nanoporous glasses combining optical transparency with permeability for nanosized agents have become the base of numerous functional nanomaterials.

At the same time, due to the disordered amorphous structure, isotropy, and chemical composition limited to glass-forming systems, glasses lack some important functional properties such as piezoelectricity, pyroelectricity, second-order optical nonlinearity, etc.; have limited spectral transmission window; and cannot compete with many single crystals in mechanical strength, durability, and luminescence efficiency. Optical ceramics are transparent polycrystalline materials based mainly on cubic phases and fabricated by ceramic production methods. They complement and expand the functionality of glasses in optical applications and offer a cost-effective alternative to single crystals. Glass-ceramics produced by the controlled crystallization of glasses gave birth to new types of highly viable materials such as ultra-low-expansion transparent glass-ceramics. Recently developed laser-based methods for the space-selective crystallization of glasses and amorphization of ceramics are opening the way for the development of novel types of components for micro-optics and integrated optical circuits.

It is my pleasure to invite you to contribute to the Special Issue “Glasses and Ceramics: Optical Properties and Optical Technologies”. We welcome the submission of full papers, communications, and reviews related to the optical properties of vitreous, ceramic, and glass-ceramic materials, and optical technologies based on these materials or related to their production, characterization, or processing.

Dr. Sergey V. Lotarev
Guest Editor

Manuscript Submission Information

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Keywords

  • optical materials
  • glass
  • ceramics
  • glass-ceramic
  • optical properties
  • optical technologies
  • photonics laser microfabrication

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Published Papers (2 papers)

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Research

12 pages, 2652 KiB  
Article
Artificial Anisotropy in Ge2Sb2Te5 Thin Films after Femtosecond Laser Irradiation
by Aleksandr Kolchin, Dmitrii Shuleiko, Mikhail Martyshov, Aleksandra Efimova, Leonid Golovan, Denis Presnov, Tatiana Kunkel, Victoriia Glukhenkaya, Petr Lazarenko, Pavel Kashkarov, Stanislav Zabotnov and Sergey Kozyukhin
Materials 2022, 15(10), 3499; https://doi.org/10.3390/ma15103499 - 13 May 2022
Cited by 6 | Viewed by 2030
Abstract
Ge2Sb2Te5 (GST225) looks to be a promising material for rewritable memory devices due to its relatively easy processing and high optical and electrophysical contrast for the crystalline and amorphous phases. In the present work, we combined the possibilities [...] Read more.
Ge2Sb2Te5 (GST225) looks to be a promising material for rewritable memory devices due to its relatively easy processing and high optical and electrophysical contrast for the crystalline and amorphous phases. In the present work, we combined the possibilities of crystallization and anisotropic structures fabrication using femtosecond laser treatment at the 1250 nm wavelength of 200 nm thin amorphous GST225 films on silicon oxide/silicon substrates. A raster treatment mode and photoexcited surface plasmon polariton generation allowed us to produce mutually orthogonal periodic structures, such as scanline tracks (the period is 120 ± 10 μm) and laser-induced gratings (the period is 1100 ± 50 nm), respectively. Alternating crystalline and amorphous phases at the irradiated surfaces were revealed according to Raman spectroscopy and optical microscopy studies for both types of structures. Such periodic modulation leads to artificial optical and electrophysical anisotropy. Reflectance spectra in the near infrared range differ for various polarizations of probing light, and this mainly results from the presence of laser-induced periodic surface structures. On the other hand, the scanline tracks cause strong conductivity anisotropy for dc measurements in the temperature range of 200–400 K. The obtained results are promising for designing new GST225-based memory devices in which anisotropy may promote increasing the information recording density. Full article
(This article belongs to the Special Issue Glasses and Ceramics: Optical Properties and Optical Technologies)
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7 pages, 1165 KiB  
Communication
Hollow Channel Formation inside Sodium Aluminoborate Glass by Femtosecond Laser Writing and Distilled Water Etching
by Sergey Fedotov, Alexey Lipatiev, Tatiana Lipateva, Sergey Lotarev and Vladimir Sigaev
Materials 2021, 14(19), 5495; https://doi.org/10.3390/ma14195495 - 23 Sep 2021
Cited by 1 | Viewed by 1723
Abstract
Recently, the effect of nanograting formation was demonstrated for binary sodium borate glass with the possibility of data storage with an enhanced level of security. The obvious disadvantage of such glass is poor chemical stability, which limits real applications. In this paper, we [...] Read more.
Recently, the effect of nanograting formation was demonstrated for binary sodium borate glass with the possibility of data storage with an enhanced level of security. The obvious disadvantage of such glass is poor chemical stability, which limits real applications. In this paper, we show that the introduction of Al2O3 allows preserving the possibility of nanograting formation with a significant increase of chemical resistance and thus to preserve optical memory applications. On the other hand, the possibility of selective etching of laser-written tracks by means of distilled water is revealed, which was not demonstrated for other types of glasses. The dependence of retardance of nanogratings form birefringence on laser writing parameters is established and discussed. Structural features of laser-modified microdomains are studied via Raman spectroscopy which revealed an increase of three-coordinated boron content. A possible mechanism of selective etching is discussed. Full article
(This article belongs to the Special Issue Glasses and Ceramics: Optical Properties and Optical Technologies)
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