Advanced lanthanide doped upconversion nanomaterials for lasing emission

• 作者: Yunfei Shang Tong Chen Tianhui Ma Shuwei Hao Weiqiang Lv Dechang Jia Chunhui Yang
• 来源期刊: 稀土学报（英文版）
• 年，卷（期）: 2022,（5）
• 所属期刊栏目: INVITED REVIEWS
• 页码范围: 687-695
• 页数: 9页
• 语种: 英文

摘要

Microlasers are narrow-band and coherent light from small cavities,which have been widely applied in biomedicine,optical interconnection,integration devices,etc.Lanthanide doped upconversion materials are potential gain media for microlasers from near infrared(NIR)to visible and UV regimes due to their multi ladder-like metastable energy levels and superior optical frequency conversion capability.The optical feedback from photon scattering of the porous upconversion nanoparticles clusters has been reported to produce upconversion random lasers.The light bouncing back and forth between two reflective surfaces or internal surface has been utilized to achieve modulated upconversion lasing emission.In addition,photon lattices and plasmonic cavities with enhanced electromagnetic fields can amplify the upconversion process within the sub-diffraction volumes and produce highly efficient upconverting lasers.In this review,the recent advances on using lanthanide doped upconversion ma-terials for random,whispering gallery mode(WGM)/Fabry-Perot(FP)cavity and photon lattice/plas-monic cavity modulated upconversion microlasers are overviewed.Current challenges and future directions of the upconverting lasers are also discussed.