文献类型：期刊文献

英文题名：Nanoconfined Synthesis of Lead Sulfide Quantum Dots Embedded in Mesoporous Aluminosilicate Glass with Adjustable Near-Infrared Broadband Luminescence

作者：Chen, Junwei[1];Chen, Chunlin[1,2];Lau, Kuen Yao[3,4,5];Jiang, Qi[1];Li, Ao[1];Yang, Yuting[6];Zhai, Yujia[6];Liu, Xiaofeng[6];Zhang, Liangzhu[1];Zeng, Huidan[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, CAS Key Lab Mat High Power Laser, Shanghai 201800, Peoples R China;[3]Soochow Univ, Key Lab Adv Opt Mfg Technol Jiangsu Prov, Sch Optoelect Sci & Engn, Suzhou 215006, Peoples R China;[4]Soochow Univ, Key Lab Adv Opt Mfg Technol Jiangsu Prov, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215006, Peoples R China;[5]Soochow Univ, Key Lab Modern Opt Technol, Educ Minist China, Suzhou 215006, Peoples R China;[6]Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China

年份：2024

卷号：36

期号：3

起止页码：1113

外文期刊名：CHEMISTRY OF MATERIALS

收录：;EI(收录号：20240315402749);WOS:【SCI-EXPANDED(收录号:WOS:001162199700001)】；

基金：This work was supported by the National Key R&D Program of China (2021YFB3701600), the National Natural Science Foundation of China (NSFC 22209176, 52272001, 52072122), the Liaoning Natural Science Foundation (2023-BS-007), and the Shanghai Pujiang Talent Plan Project (23PJ1402000). We sincerely appreciate the support of Professor He Jin from the CAS Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences.

语种：英文

外文关键词：Fiber lasers - Glass - Infrared devices - IV-VI semiconductors - Luminescence - Mesoporous materials - Mode-locked fiber lasers - Nanocrystals - Optical communication - Passive mode locking - Quantum dot lasers - Quenching - Saturable absorbers - Semiconductor quantum dots - Sol-gels - Sulfur compounds - Temperature

摘要：Functionalizing glass with optically active quantum dots has shown great potential in near-infrared bioimaging and optical communication. However, the size distribution of quantum dots is hard to control by traditional glass quenching method due to extremely high processing temperature (similar to 1300(degrees)C), resulting in unexpected transmission loss and luminescent quenching of quantum dots embedded in a glass composite. Herein, we developed a nanoconfined synthesis of lead sulfide (PbS) quantum dots in a mesoporous aluminosilicate glass matrix at a relatively low temperature of 600 C-degrees with adjustable near-infrared broadband luminescence. The sol-gel-synthesized glass composite precursor with high surface areas over 480 m2/g and a nanopore mean diameter of about 3.2 nm can enable the homogeneous dispersal of PbS quantum dots in the mesoporous glass matrix as well as restrict the overgrowth of quantum dots to prevent aggregation. The PbS-AS glass composites exhibited dual-band near-infrared luminescence, showcasing morphological and nonlinear saturable absorption properties. The 0.8PbS-AS glass served as an effective saturable absorber for a passively mode-locked Er-doped fiber laser, achieving a pulse repetition rate of similar to 0.09 kHz/mW and a pulse width of similar to 0.04 mu s/kHz. The PbS-SA is confirmed to be suitable for a Q-switched mode-locking laser, showing high potential for mode-locked laser generation with further SA optimization.