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GOMD-DGG 2015 Award Speakers

GOMD-DGG Joint Annual Meeting

 

Register by April 10 to save $150

 

N.-B.-Singh

Stookey Lecture of Discovery

N. B. Singh, University of Maryland, Baltimore County, USA

 

Title: Development of multifunctional chalcogenide and chalcopyrite crystals and glasses

 

Abstract: In the past few decades a large amount of research has been performed to develop glass and single crystal materials for the acousto-optic (AO), nonlinear optical (NLO), optical filter (OF), beam deflector and coating applications for the visible and near–infrared wavelength region. However, for the mid wave infrared (MWIR) and long wave infrared (LWIR) region there is still a strong need for efficient materials. Most of the oxides including lithium niobate suffer due to high absorption coefficient at high laser power above 4 μm. Also, oxides have higher absorptions due to inherent impurities which limit their applications for the high power laser optical parametric oscillation (OPO) and many devices where high absorption generates large amount of heat. In spite of more than three decades of research on ZnGeP2 and CdGeAs2, there are problems of cracking and significantly high absorption in the near-IR wavelength region. To overcome these problems several classes of materials such as sulfides, selenide and tellurides are very attractive and have been studied extensively. Selenides are most attractive since these cover wavelength region from near-IR to LWIR and have lowest absorption among this class of materials for a very wide transparency region. This makes selenides very attractive for direct conversion from 1.06 μm to MWIR and LWIR wavelength conversion with reasonably high nonlinear optical figure of merit.

In this presentation we will summarize merits and demerits of by providing examples of AO, NLO and filter devices and their performance for variety of applications. Over past several years, we have grown, fabricated and studied extensively crystals of gallium selenide (GaSe), thallium arsenic selenide (Tl3AsSe3), thallium arsenic sulfide (Tl3AsS4), thallium phosphorous selenide (Tl3PSe4), silver thallium sulfide (AgTlS2), silver gallium sulfide (AgGaS2), silver gallium selenide (AgGaSe2), and silver gallium germanium selenide (AgGaGe3Se8 and AgGaGe5Se12). Among this class of materials GaSe has strong tendency of cleaving due to Vander Waal forces along –C direction. The ternary and quaternary materials have a large flexibility to design transparency, damage threshold and effective performance. Tl3AsSe3 and quaternary compounds AgGaGe3Se8 and AgGaGe5Se12 do not require annealing, show very large transparency range and have extremely low absorption coefficient. In addition to the bulk crystal growth we have made significant progress in developing the engineered structures of quasi phase matched (QPM) for frequency conversion. We chose ZnSe because of its large transparency, low absorption and other favorable properties. In this paper we will describe growth and performance of these bulk and QPM materials for laser development and acousto-optical hyperspectral imaging.

 

Biography: Prof. N. B. Singh is a Fellow of American Society of Materials International, a Fellow of SPIE-The International Society of Optics and Photonics, a Fellow of OSA- The Optical Society of America (OSA) and a Fellow of the RSC-The Royal Society of the Chemistry, is internationally recognized for the managerial leadership and research in the area of materials science and engineering. He held the position of Senior Consulting Engineer, the highest technical position until December 30, 2011, in the Northrop Grumman Electronic Systems at Baltimore Maryland. At Northrop Grumman, he performed research for the development of bulk, thin film and nano engineered materials, FPA substrates such as CdZnTe, PbSe, PbSnTe, acousto-optic (AO) based imagers and spectral sensors, dielectric materials, bulk and QPM structures for Mid-IR lasers, organic materials for nonlinear optical (NLO) applications, wide bandgap materials AlN and SiC for high power RF and high temperature microelectronics, and radiation detector materials. Mr. Garry Clark, President, Westinghouse Electric Corporation, had awarded him the corporation’s highest award, the “George Westinghouse Signature Award of Excellence” in 1995, for his leadership and work on development of UV filter materials and technology transfer. He was honored by the ASM-IIM Lectureship award in 2003 and 2013 and OSA Fellow Lectureship award in 2012. Dr. Singh was identified as a “R&D star” to watch by Industry Magazine in 1995. He was awarded the Gold Medal Award for life time achievements in Solid-State research by the Indian Society of Solid-State Chemists in February 2015 in an international conference in Nagpur, India. The American Society of Materials International awarded the “2010 International Engineering Materials Achievement Award” to Dr. Singh for his work on Acousto-Optic filter based imagers.

 

Dr. Singh’s interests center on “Development of Materials, Devices and Subcomponents for Military and commercial Applications” which utilize solidification, crystal growth of bulk, thin film and Nano crystals, coatings, device fabrications and characterization. Dr. Singh was involved in developing science parameters for several flight experiments and led as PM the Northrop Grumman Hg2Cl2 crystal growth flight experiments. He has published more than 200 journal papers, presented more than 150 papers in conferences, presented more than 80 invited talks, has 21 issued patents, more than 200 company trade secrets and invention awards. Dr. Singh has been Associate Editor of the journal, Progress in Crystal Growth and Characterization, and is in the editorial board of other journals. Dr. Singh served as an Executive Committee member of the American Association for Crystal Growth for 12 years; he founded the Pittsburgh Chapter and the Capital Chapter of Crystal Growers. He is a very active member of the SPIE, OSA, American Ceramic Society (ACeS) and ASM International, and has served on the organizing and advisory committees of many national and international conferences. He is the founder of the Pittsburgh Chapter (PCCG) and the Capital Chapter of Crystal Growers (CCCG). Dr. Singh is the founder of the Northrop Grumman Materials Corporate Forum which focuses on critical materials technologies and holds yearly conference for the Northrop Grumman researchers. Dr. Singh has been honored by many local chapters of the American Association of Crystal Growth (AACG) including the Mid-Atlantic Chapter, the Pittsburgh Chapter and the Capital Chapter of Crystal Growth. He was chairman of the Gordon Conference on “Gravitational Effects on Materials” in 1993. Dr. Singh served the National Academy of Sciences as a panel member on the National Materials Advisory Board (NMAB) for many years. He is involved in teaching Hindi, Science and religion to children between ages of 4 to 15 years every Sunday at the Hindu Temple in Baltimore.  

Jianrong Qiu

Morey Lecture

Jianrong Qiu, chair professor, Cheung Kong Scholars Programme, South China University of Technology, China

 

Title: Control of the metastable state of glasses 

 

Abstract: Materials science deals with relationships between synthesis, structure, properties and performance of the materials. Glass is a special material featuring good homogeneity, variable composition, easy shaping and doping, owing to its meta-stable state and topological network structure. It is considered that the nature of glass and glass transition are among the most important problems in the field of condensed matter. However, no dramatic change of the glass properties can be realized by controlling fictive temperature of glass. We have focused our research on the change and enhancement of the properties of glass by manipulation of the metastable nature of glasses. This strategy allows for precise control of the microstructure of glasses by using external fields e.g. light, temperature and pressure, and the development of novel and enhanced functionalities by controlling electronic band structure, defect state and nano- or microstructure of glass. In this talk, I will highlight our recent research developments on the design and control of the optical properties of glass through fast-cooling, crystallization and phase separation. We have demonstrated the realization of ultra-broadband near-infrared emission via control of valence state of Bi ion, ligand field around transition metal ions and energy transfer between two active ions for broadband optical amplification and tunable laser. I will also introduce our results on the printing of three-dimensional nano- or microstructures and multiple functions inside glasses by fs laser based on multiphoton absorption assisted control of excited state of dopants and nanostructures. These studies are not only helpful for understanding the nature of glass, but also valuable for the fabrication of optical devices. 

 

Biography: Qiu has published more than 500 papers in several fundamental areas of glass science and technology such as glasses and glass ceramics for broadband optical amplification and tunable laser, and femtosecond laser interaction with glass. He is coauthor of two books (“Glass for photonic devices” (with Prof. K. Hirao et al.)”; and “Femtosecond technology— Basis and application” (with Prof. K. Hirao)). He received his PhD from Okayama University, Japan, working in the Non-Crystalline Solids group under the guidance of Prof. Y. Miura and Prof. A. Osaka. Prof. Qiu received the Adachi Award from the Rare-earth Society of Japan in 1999, Otto-Schott Research Award from the Ernst Abbe Fund in 2005, and Academic Award from the Ceramic Society of Japan in 2007. He has been an associate editor or a member of international advisory boards of a number of prestigious journals, such as, Journal of Non-Crystalline Solids, Int. J. Appl. Glass Sci, Journal of the Asian Ceramic Societies, Frontiers in Materials-Glass Science and Journal of the Chinese Ceramic Society. Qiu has devoted much of his recent work to the understanding of the nature of glass and the development of techniques for realization of novel functions of glass. His current research continues in the fields of functional glasses, fs laser interaction with glass, and inorganic luminescent materials.

 

Sabyasachi Sen 

Varshneya Frontiers of Glass Science Lecture

Sabyasachi Sen, professor, University of California at Davis, USA

 

Title: Structural aspects of relaxational dynamics in glasses and supercooled liquids

 

Abstract: The structure of a liquid in equilibrium undergoes rapid rearrangement with time.  The structural rearrangement processes, however, drastically slow down with decreasing temperature in a glass-forming liquid as the glass transition temperature Tg is approached from above and the liquid falls out of thermodynamic equilibrium.  This kinetic slowdown is typically exemplified by the variation in the transport properties such as viscosity (or diffusivity) that can easily increase (or decrease) by ~ 15 orders of magnitude on cooling the liquid from T » 3*Tg to T » Tg.  It is also at the very heart of nucleation and crystallization of a supercooled liquid and control the technological utility of glass and glass-ceramics. The dynamical processes associated with the viscous/diffusive transport have been treated in the literature principally as macroscopic phenomena within the framework of phenomenological models and often interrogated using bulk relaxation (volume, enthalpy, shear, dielectric, photon echo) experiments that typically lack a direct microscopic understanding of the atomic scale processes that accompany structural relaxation. On the other hand, the unique combination of the timescale associated with dynamical NMR spectroscopic techniques (ms to s) and the accompanying structural information, is ideally suited for probing the mechanistic aspects of the relaxational dynamics at atomic/molecular level in glasses and viscous liquids. In this talk I will present an overview of the work from our laboratory in the recent years involving the application of such spectroscopic techniques to address the nature and timescales of the various thermally driven configurational changes in a wide variety of inorganic and organic glasses and supercooled liquids and their relationship to macroscopic relaxation and transport processes.

 

Biography: Sen obtained his PhD in Geochemistry in 1996 from Stanford University where he was also a post-doctoral fellow until 1997.  He then joined the faculty of the dept. of physics at the University of Wales, Aberystwyth in UK where he remained until 1999.  Subsequently, he joined the R&D in Corning Inc. in NY, USA as a senior research scientist in the Glass Research group.  He moved to the University of California at Davis in 2004 to join the faculty of the department of materials science and engineering as Associate Professor and was promoted to Professor in 2010.  He has authored/co-authored more than 150 scientific papers and 7 US patents.    He currently serves on the editorial boards of Journal of Non-Crystalline Solids, Materials Research Express and Earth and Planetary Materials. His current research interests include the application of state-of-the-art spectroscopic and diffraction techniques in understanding structure and dynamics in amorphous materials including glasses and glass-forming liquids, fast ion conduction in crystalline solid oxide electrolytes, battery materials and ionic liquids.

 

Steve Jung 

Varshneya Frontiers of Glass Technology Lecture

Steven B. Jung, chief technology officer, Mo-Sci Corporation, USA

 

Title: The present and future of glass in medicine

 

Abstract: Glass is already being used in medical applications from cancer treatment to tissue regeneration.  The future of glass in medicine will require advances in chemical composition, shape / form factor, and processing to continue to improve treatment options for clinicians. The beauty of glass is that it can be almost anything we want; durable or degradable, solid or porous, it can be manipulated into almost any shape, and the list goes on.  The uniqueness of the material properties of glass ultimately makes way for truly unique medical devices.  This talk will focus on present advances in hard and soft tissue regeneration and why it is believed glass materials will remain a viable and growing option for the future of healing. 

 

Biography: Jung is the chief technology officer at a specialty and healthcare glass manufacturer, Mo-Sci Corporation, which is located in Rolla, Missouri, USA.  He received his Ph.D. in Materials Science and Engineering from the Missouri University of Science and Technology in 2010.  There he studied bioactive glass scaffolds for hard and soft tissue regeneration.  Steven is an inventor on 11 U.S. patents and ~50 US and international patents pending in the area of biomaterials.  He is married to his wife Rachel and has a son Benjamin.

 

 Michael-J

Norbert J. Kreidl Award for Young Scholars

Michael J. Guerette, Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, USA

 

Title: Structure and Nonlinear Elasticity of Silica Glass Fiber under High Strains

 

Abstract: In-situ Raman and Brillouin light scattering techniques with a spatial resolution of 1 μm have been developed to study structural signatures and elastic moduli of silica glass fiber under tensile and compressive strains in a two-point bend test. By traversing the cross-section at the apex, a convenient way to determine the neutral axis of a bent fiber was established. Resulting from the nonlinear elastic behavior of silica glass, the predicted neutral axis shift was directly observed for the first time in our experiments. The verified neutral axis shift will allow for more accurate calculations of both strain and stress of a bent fiber. An expression for elastic modulus is generated which includes the 5th order term that is required to capture both the minimum in compression and the maximum in tension for silica glass in bend. Raman spectra show polarization-dependent structural signatures of silica glass in tension and compression. Our studies contribute to a fundamental understanding of the structure and elastic properties of glasses under high strain conditions, which is of critical importance for developing strong glasses. 


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