Phonon‐Assisted Population Inversion in Lanthanide‐Doped Upconversion Ba2LaF7 Nanocrystals in Glass‐Ceramics

Advanced MaterialsVolume 28, Issue 36 p. 8045-8050 Communication Phonon-Assisted Population Inversion in Lanthanide-Doped Upconversion Ba2LaF7 Nanocrystals in Glass-Ceramics Xuhui Xu, Xuhui Xu Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093 ChinaSearch for more papers by this authorWenfei Zhang, Wenfei Zhang Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong Shenzhen Key Laboratory of Laser Engineering, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060 ChinaSearch for more papers by this authorDecheng Yang, Decheng Yang Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong KongSearch for more papers by this authorWei Lu, Wei Lu Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong KongSearch for more papers by this authorJianbei Qiu, Jianbei Qiu College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093 ChinaSearch for more papers by this authorSiu Fung Yu, Corresponding Author Siu Fung Yu apsfyu@polyu.edu.hk sfyu21@hotmail.com Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong KongE-mail: apsfyu@polyu.edu.hk, sfyu21@hotmail.comSearch for more papers by this author Xuhui Xu, Xuhui Xu Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093 ChinaSearch for more papers by this authorWenfei Zhang, Wenfei Zhang Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong Shenzhen Key Laboratory of Laser Engineering, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060 ChinaSearch for more papers by this authorDecheng Yang, Decheng Yang Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong KongSearch for more papers by this authorWei Lu, Wei Lu Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong KongSearch for more papers by this authorJianbei Qiu, Jianbei Qiu College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093 ChinaSearch for more papers by this authorSiu Fung Yu, Corresponding Author Siu Fung Yu apsfyu@polyu.edu.hk sfyu21@hotmail.com Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong KongE-mail: apsfyu@polyu.edu.hk, sfyu21@hotmail.comSearch for more papers by this author First published: 05 July 2016 https://doi.org/10.1002/adma.201601405Citations: 98Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Graphical Abstract The effective population inversion of 2H11/2 from 4S3/2 state of Er3+ions can be achieved through the annihilation of phonons; random lasing action from BLF films embedded with Yb3+/Er3+ codoped BLF nanocrystals is demonstrated and high ambient temperature (>433 K) operation lasers with a very low excitation threshold (<530 nJ cm−2) are realized. Citing Literature Supporting Information As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Filename Description adma201601405-sup-0001-S1.pdf2.1 MB Supplementary Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article. Volume28, Issue36September 28, 2016Pages 8045-8050 RelatedInformation