Shu Yiqing, An Mingqi, Guo Penglai, Yuan Xun, Wu Leiming, Lin Zhitao, Chen Weicheng, Li Xiaohui, Li Jianqing
School of Computer Science and Engineering, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macao, China.
Guangdong-HongKong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan University, Foshan 528225, China.
Nanomaterials (Basel). 2022 Jun 20;12(12):2112. doi: 10.3390/nano12122112.
Double perovskites (DPs) have been attracting attention in an assortment of optoelectronic applications, for they hold advantages such as high quantum efficiency, long carrier migration distance and strong linear and nonlinear absorptions. As specific kinds of perovskites (PVKs), DPs are gifted with orthorhombic crystal structures which provide rich conversion combinations and broaden the space for research and application. However, few works have been reported about DPs in ultrafast photonics applications. In this article, a DP with chemical formula of BaLaTaO (BLT) was successfully synthesized by high-temperature solid phase method. The microstructures and morphologies were observed, and the linear and nonlinear absorption were characterized. By first using BLT as a novel saturable absorber in both normal and anomalous dispersion region fiber lasers, dual-wavelength soliton and dissipative soliton were successfully operated at C-band. This study affirms BLT's nonlinear optical properties, lays the foundation for optical research on BLT, and meanwhile provides a meaningful reference for future development of pulsed lasers based on DPs.
双钙钛矿（DPs）因其具有高量子效率、长载流子迁移距离以及强线性和非线性吸收等优势，在各种光电应用中备受关注。作为特定类型的钙钛矿（PVKs），双钙钛矿具有正交晶体结构，能提供丰富的转换组合，拓宽了研究和应用空间。然而，关于双钙钛矿在超快光子学应用方面的报道却很少。在本文中，通过高温固相法成功合成了化学式为BaLaTaO（BLT）的双钙钛矿。观察了其微观结构和形貌，并对线性和非线性吸收进行了表征。首次将BLT用作正常和反常色散区域光纤激光器中的新型饱和吸收体，在C波段成功实现了双波长孤子和耗散孤子运转。该研究证实了BLT的非线性光学特性，为BLT的光学研究奠定了基础，同时为基于双钙钛矿的脉冲激光器的未来发展提供了有意义的参考。
