Melt property variation in GeSe2‐As2Se3‐PbSe glass ceramics for infrared gradient refractive index (GRIN) applications
Abstract
Melt size‐dependent physical property variation is examined in a multicomponent GeSe2‐As2Se3‐PbSe chalcogenide glass developed for gradient refractive index applications. The impact of melting conditions on small (40 g) prototype laboratory‐scale melts extended to commercially‐relevant melt sizes (1.325 kg) have been studied and the role of thermal history variation on physical and optical property evolution in parent glass, the glass’ crystallization behavior and postheat‐treated glass ceramics, is quantified. As‐melted glass morphology, optical homogeneity and heat treatment‐induced microstructure following a fixed, two‐step nucleation and growth protocol exhibit marked variation with melt size. These attributes are shown to impact crystallization behavior (growth rates, resulting crystalline phase formation) and induced effective refractive index change, neff, in the resulting optical nanocomposite. The magnitude of these changes is discussed based on thermal history related melt conditions.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 30, 2018
- Source ID
- 10.1111/ijag.12618
Entities
People
- Alexej Pogrebnyakov
- Andrew Buff
- Andrew Kirk
- Andrew Swisher
- Anthony Yee
- Anupama Yadav
- Ar Hilton Jr
- Cesar Blanco
- Charmayne Smith
- Clara Rivero‐Baleine
- Duncan T. Moore
- Greg Schmidt
- Greg Whaley
- Jason Lonergan
- Kathleen A. Richardson
- Laura Sisken
- Megan Driggers
- Michael Antia
- Myungkoo Kang
- Theresa Mayer
- Thomas J. Loretz
Organizations
- Defense Advanced Research Projects Agency
- Lockheed Martin
- Pennsylvania State University
- University of Central Florida
- University of Rochester
- Virginia Tech