材料科学
折射率
硫系玻璃
硫系化合物
纳米复合材料
红外线的
相(物质)
色散(光学)
陶瓷
体积分数
光学
结晶
微晶
光电子学
复合材料
化学工程
工程类
物理
有机化学
化学
冶金
作者
Laura Sisken,Myungkoo Kang,Johann Veras,Charmayne Lonergan,Andrew Buff,Anupama Yadav,Devon L. McClane,Cesar Blanco,Clara Rivero‐Baleine,Theresa S. Mayer
标识
DOI:10.1002/adfm.201902217
摘要
Abstract Infrared (IR) glass–ceramics (GCs) hold the potential to dramatically expand the range of optical material solutions available for use in bulk and planar optical systems in the IR. Current material solutions are limited to single‐ or polycrystalline materials and traditional IR‐transparent optical glasses. GCs that can be processed with spatial control and extent of induced crystallization present the opportunity to realize an effective refractive index variation, enabling arbitrary gradient refractive index elements with tailored optical function. This work discusses the role of the parent glass composition and morphology on nanocrystal phase formation in a multicomponent chalcogenide glass. Through a two‐step heat treatment protocol, a Ge–As–Pb–Se glass is converted to an optical nanocomposite where the type, volume fraction, and refractive index of the precipitated crystalline phase(s) define the resulting nanocomposite's optical properties. This modification results in a giant variation in infrared Abbe number, the magnitude of which can be tuned with control of crystal phase formation. The impact of these attributes on the GCs' refractive index, transmission, dispersion, and thermo‐optic coefficient is discussed. A systematic protocol for engineering homogeneous or gradient changes in optical function is presented and validated through experimental demonstration employing this understanding.
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