Solid-state Optical Materials and Luminescence Properties: Optical Materials and Luminescence Properties
Sponsored by: ACerS Basic Science Division
Program Organizers: Yiquan Wu, Alfred University; Jas Sanghera, Naval Research Laboratory; Akio Ikesue, World-Lab. Co., Ltd; Rong-Jun Xie, Xiamen University; Mathieu Allix, Laboratoire CEMHTI; Kiyoshi Shimamura, National Institute for Materials Science; Liangbi Su, Shanghai Institute of Ceramics; Dariusz Hreniak, Institute of Low Temperature and Structure Research
Tuesday 8:00 AM
October 11, 2022
Room: 409
Location: David L. Lawrence Convention Center
Session Chair: Yiquan Wu, Alfred University ; Akio Ikesue, World-Lab. Co., Ltd
8:00 AM Invited
Ultrafast High Temperature Sintering for Ceramic Membranes: Liangbing Hu1; 1University of Maryland
We recently reported an ultrafast high-temperature sintering (UHS) technique for synthesizing ceramic membranes (Science 2020, 368, 521-526; Cover). UHS can achieve temperatures up to 3000 ºC and heating/cooling rates up to ~10000 K/s to rapidly sinter ceramic membranes directly from their precursor powders toward dense microstructures. In this talk, I will first discuss our progress on applying UHS to various solid-state electrolyte membranes, showcasing the unique capability of UHS from composition to microstructure control. By programming the temperature and time (T-t), we can establish process diagrams to sinter porous vs. dense structures. Next, I will discuss using UHS to sinter transparent silica glass membranes. The sintered material by UHS exhibit relative densities of > 98% and high visible transmittances of ~90%. The process can be further extended to a range of glasses such as indium tin oxide (ITO)-doped silica, and other transparent ceramics such as Gd-doped yttrium aluminum garnet.
8:20 AM Invited
Upconverting Er3+-doped Ytterbium-aluminum Garnet Ceramics: Dariusz Hreniak1; Robert Tomala1; Zhengfa Dai2; Daria Szewczyk1; Andrzej Jezowski1; Jiang Li3; 1Institute of Low Temperature and Structure Research PAS; 21 Institute of Low Temperature and Structure Research PAS 2 Shanghai Institute of Ceramics CAS; 3Shanghai Institute of Ceramics CAS
Transparent Er3+-doped ytterbium-aluminum garnet (YbAG:Er3+) ceramics were fabricated by a solid-state reactive and vacuum sintering. Power dependent luminescence properties in the range from cryogenic to room temperature were analyzed, especially the up-conversion. The order parameter of up-conversion processes of YbAG:Er3+ (1 at%) ceramics was determined to investigate the efficiency of different channels of the energy transfers. Obtained spectroscopic properties were related to the microstructural and thermal properties of the studied samples.
8:40 AM Invited
Polycrystalline Ceramics for Lasers: Current Potential and Limits: Rémy Boulesteix1; Florian Delaunay1; Lucas Viers1; Alexandre Maitre1; 1University of Limoges
Polycrystalline transparent ceramics are materials produced by shaping and sintering of powders. They have the advantage of combining the physico-chemical properties of single crystals and the flexibility of composition and geometry offered by ceramic processes. They thus allow new perspectives (large sizes, varied compositions, composition gradients, etc.) opening the way to new applications and/or improvements in the performance of current devices. This work aims to present the main processes suitable for controlling the microstructure, geometry and architecture of ceramic-based optical components. The application of this approach to ceramics based on YAG:Nd3+, YAG:Ho3+ or even Lu2O3:Ho3+ used as a solid laser amplifying media will be presented and their performance discussed with regard to the process parameters.
9:00 AM
Fabrication and Properties of Y2O3 Based Ceramics: Shyam Bayya1; Woohong Kim1; Joshua Gild2; Tony Zhou2; Adam Floyd3; Bryan Sadowski3; Jas Sanghera1; 1Naval Research Laboratory; 2University ResearchFoundation; 3Jacobs
Transparent Y2O3 ceramic can be an excellent window material with its broad transmission from visible to 8 µm in the infrared. It’s low emissivity compared to other transparent oxide materials, such as spinel, sapphire and ALON, is important for high temperature applications. This paper explores various processing methods (sintering, hot pressing and SPS) and also the effects of additives (sintering aids and secondary phases) on the transmission, microstructure and physical properties of Y2O3 based ceramics.
9:20 AM
Laser Processing of Glass, Using the Memory of Glass to Characterize the Local Modifications: Michael Bergler1; Ferdinand Werr1; Kristian Cvecek1; Alexander Veber2; Urs Eppelt3; Ludger Müllers3; Michael Krause4; Thomas Höche4; Michael Schmidt1; Dominique de Ligny1; 1Friedrich-Alexander-Universität Erlangen-Nürnberg; 2Humboldt-Universität zu Berlin; 3Coherent Munich GmbH & Co. KG; 4Fraunhofer - Institut für Mikrostruktur von Werkstoffen und Systemen IMWS
Lasers are more and more used to shape or functionalize glasses used for optical applications. They are used to cut, write waveguides, create nanograttings, etc… This open a very large play ground to design and produce future optical devices. However what really happen to the glass itself is still not fully understood and controlled. Submitted to extreme conditions the structure of glass evolves and keeps in memory its formation conditions. Raman and Brillouin spectroscopy and the luminescence of rare Earth elements as Eu and Nd allow us to read this memory.It will be first explain how reliable multi-parameters calibration curves can be obtained to correlate the observations with physical parameters as cooling rate, maximal pressure, residual stress. Secondly, it will be shown a large number of examples how these different spectroscopic methods offer a versatile and efficient way to screen the link between laser parameters and the final object.
9:40 AM
Melt Processing of a Co-extruded LiCa2Mg2V3O12 Garnet onto a YAG Single Crystal for IR Laser Applications: John Drazin1; Hyunjun Kim1; Kathryn Doyle1; Andrew Schlup1; Cynthia Bowers1; Randall Hay2; Kent Averett2; 1UES Inc; 2Materials and Manufacturing Directorate, Air Force Research Laboratory
YAG single crystals are being manufactured with sub-100 micron diameters (core fiber) for future IR high power generation applications. At these narrow diameters, the multimodal beam extends past the core fiber diameter which requires an optical cladding to maintain beam quality and power density in the laser system. Current YAG core fibers are coated with ceramic glasses, but these materials possess low thermal conductivities (~1W/m*K) which limits core fiber heat dissipation. Adding a crystallized ceramic would improve the thermal conductivity, but many viable options could leach out dopants from the core fiber during sintering. Therefore, in this work, a novel low melting temperature (1115C) LiCa2Mg2V3O12 garnet was synthesized and applied onto a single crystal 150um diameter YAG fiber in a water based paste and subsequently melted onto the core fiber. Thermal properties of the cladding material were measured and the cladding microstructure was observed using SEM and TEM.
10:00 AM Break
10:20 AM
Reusable Multilayer Photonic Nanostructured Coatings for Optical Limiting of High Energy Lasers: Christopher DeSalle1; Justin Reiss1; Patrick Albert1; Sergei Stepanoff1; Ryan Romesberg1; Josie Hoover1; William Urmann1; Dax Hoffman1; Jake Keiper2; Michael Schmitt2; Douglas Wolfe1; 1The Applied Research Laboratory at Penn State; 2HAMR Industries
The advancement of lasing technology over the last century has resulted in the generation of high energy lasers (HELs) and other directed energy weapons (DEWs) as an offensive warfighting strategy. As a defensive advantage, the development of a reusable optical limiter coating with broadband reflection is essential to protect military components subject to targeted attacks. The coatings from this study were engineered to exhibit an on/off nonlinear optical behavior that allows for transmission at a specific wavelength at low incident irradiances, and high reflection at high incident irradiances. The optical limiter coating is comprised of a nonlinear material deposited within the cavity of a Fabry-Perot filter consisting of two mirrored quarter wavelength distributed Bragg reflectors. In this study, nitride and oxide based material systems were deposited utilizing magnetron sputtering and electron-beam physical vapor deposition, respectively. Future development of optical limiters may provide protection of communication systems and electronic devices.
10:40 AM
Development of Sc2Mo3O12:Eu3+ as a Red Phosphor with Superior Thermally Enhanced Emission: Forough Jahanbazi1; Yuanbing Mao1; 1Illinois Institute of Technology
Photoluminescence thermal quenching is one of the major challenges for practical lighting applications. Here, we have explored a novel strategy to dramatically enhance the luminescence at elevated temperature based on Sc2Mo3O12:Eu3+. Upon heating, an energy transfer intensified from the Sc2Mo3O12 host material to Eu3+ dopant resulting in an efficient red emission. The thermally induced contraction and distortion of the host lattice, owing to its negative thermal expansion property, is shown to be the cause for the enhanced energy transfer and consequently the intensified emission from the activator ion Eu3+. Finally, the mechanism of this thermally enhanced emission is discussed according to the negative thermal expansion of the host structure and its possible effect on the energy transfer intensity. Findings presented here provide inspiration for employing negative thermal expansion property to remedy the thermal quenching problem of phosphors existing in their lighting applications.