Pernice Pasquale, Sirleto Luigi, Rossi Manuela, Iodice Mario, Vergara Alessandro, Di Girolamo Rocco, Luciani Giuseppina, Imparato Claudio, Aronne Antonio
Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli Federico II, P.le Tecchio, 80, I-80125 Napoli, Italy.
National Research Council (CNR), Institute of Applied Sciences and Intelligent Systems, Via Pietro Castellino 111, I-80131 Naples, Italy.
Nanomaterials (Basel). 2023 Mar 24;13(7):1168. doi: 10.3390/nano13071168.
Stimulated Raman scattering in transparent glass-ceramics (TGCs) based on bulk nucleating phase BaNaNbO were investigated with the aim to explore the influence of micro- and nanoscale structural transformations on Raman gain. Nanostructured TGCs were synthesized, starting with 8BaO·15NaO·27NbO·50SiO (BaNaNS) glass, by proper nucleation and crystallization heat treatments. TGCs are composed of nanocrystals that are 10-15 nm in size, uniformly distributed in the residual glass matrix, with a crystallinity degree ranging from 30 up to 50% for samples subjected to different heat treatments. A significant Raman gain improvement for both BaNaNS glass and TGCs with respect to SiO glass is demonstrated, which can be clearly related to the nanostructuring process. These findings show that the nonlinear optical functionalities of TGC materials can be modulated by controlling the structural transformations at the nanoscale rather than microscale.
为了探究微观和纳米尺度结构转变对拉曼增益的影响，对基于块状成核相BaNaNbO的透明玻璃陶瓷（TGC）中的受激拉曼散射进行了研究。以8BaO·15NaO·27NbO·50SiO（BaNaNS）玻璃为起始原料，通过适当的成核和晶化热处理合成了纳米结构的TGC。TGC由尺寸为10 - 15 nm的纳米晶体组成，这些纳米晶体均匀分布在残余玻璃基质中，对于经过不同热处理的样品，其结晶度范围为30%至50%。结果表明，与SiO玻璃相比，BaNaNS玻璃和TGC的拉曼增益均有显著提高，这显然与纳米结构化过程有关。这些发现表明，通过控制纳米尺度而非微观尺度的结构转变，可以调节TGC材料的非线性光学功能。
