About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Glasses and Optical Materials: Challenges, Advances, and Applications
|
| Presentation Title |
Multi-Faceted Quantitative Cross-Correlating Characterization and Phase Mapping of Gradient Refractive Index Chalcogenide Glass-Ceramic Bulk Nanocomposites |
| Author(s) |
Zephyr Ramsey, Gil Blas Sop Tagne, Lam Tran, Patrick E. Lynch, Jessica E. Lyza, Christian G. Cano, Phillip M. Marrero, Roberto A. Alvarez, Daniel Wiedeman, Rashi Sharma, Nicholas Kochan, Kathleen A. Richardson, Steven Feller, Darren Stohr, Collin J. Wilkinson, Rebecca S. Welch, S.K. Sundaram, Scott T. Misture, Kun Wang, Myungkoo Kang |
| On-Site Speaker (Planned) |
Zephyr Ramsey |
| Abstract Scope |
Synthesis of transparent glass-ceramic nanocomposites demands simultaneous control of crystalline phase type, size, volume fraction, spatial distribution, and composition inside the glass matrix. Development of single-component gradient-refractive-index (GRIN) optics intensifies this challenge and calls for a combination of industrially scalable fabrication and multifaceted characterization. Using Ge–As–Pb–Se chalcogenide glass as a model system, we present an economical, one-step gradient thermal treatment supported by quantitatively cross-correlated microstructural-morphological-chemical-optoelectronic metrology. The process yields spatially tuned GRIN bulk glass-ceramics that maintain infrared transparency and exhibit refractive-index contrasts up to 0.2. Ongoing X-ray studies will resolve crystallization pathways and phase distributions under well-defined thermal histories, enabling spatial tailoring of optical functionality. In-situ XRD synchronized with the gradient thermal schedule tracks real-time phase evolution, while forthcoming 3-D nano X-ray fluorescence scanning will precisely map individual phases in a 3-D space. These insights underpin a cost-effective, scalable route to spatially tuned optical components. |