Abstract: Advanced MaterialsVolume 33, Issue 12 2170092 FrontispieceFree Access Perovskite Lasers: Ultralow-Threshold Continuous-Wave Room-Temperature Crystal-Fiber/Nanoperovskite Hybrid Lasers for All-Optical Photonic Integration (Adv. Mater. 12/2021) Duc Huy Nguyen, Duc Huy Nguyen Department of Physics, National Dong Hwa University, Hualien, 974301 TaiwanSearch for more papers by this authorJia-Yuan Sun, Jia-Yuan Sun Department of Physics, National Dong Hwa University, Hualien, 974301 TaiwanSearch for more papers by this authorChia-Yao Lo, Chia-Yao Lo Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung, 20224 TaiwanSearch for more papers by this authorJia-Ming Liu, Jia-Ming Liu Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, 90095 USASearch for more papers by this authorWan-Shao Tsai, Wan-Shao Tsai Department of Electric Engineering and Graduate Institute of Optoelectronic Engineering, National Chung Hsing University, Taichung, 40227 TaiwanSearch for more papers by this authorMing-Hung Li, Ming-Hung Li Department of Physics, National Dong Hwa University, Hualien, 974301 TaiwanSearch for more papers by this authorSin-Jhang Yang, Sin-Jhang Yang Department of Physics, National Dong Hwa University, Hualien, 974301 TaiwanSearch for more papers by this authorCheng-Chia Lin, Cheng-Chia Lin Department of Opto-Electronic Engineering, National Dong Hwa University, Hualien, 974301 TaiwanSearch for more papers by this authorShien-Der Tzeng, Shien-Der Tzeng Department of Physics, National Dong Hwa University, Hualien, 974301 TaiwanSearch for more papers by this authorYuan-Ron Ma, Yuan-Ron Ma Department of Physics, National Dong Hwa University, Hualien, 974301 TaiwanSearch for more papers by this authorMing-Yi Lin, Ming-Yi Lin Department of Dermatology, National Taiwan University Hospital and College of Medicine, National Taiwan University, Taipei, 100229 TaiwanSearch for more papers by this authorChien-Chih Lai, Chien-Chih Lai Department of Physics, National Dong Hwa University, Hualien, 974301 Taiwan Department of Opto-Electronic Engineering, National Dong Hwa University, Hualien, 974301 TaiwanSearch for more papers by this author Duc Huy Nguyen, Duc Huy Nguyen Department of Physics, National Dong Hwa University, Hualien, 974301 TaiwanSearch for more papers by this authorJia-Yuan Sun, Jia-Yuan Sun Department of Physics, National Dong Hwa University, Hualien, 974301 TaiwanSearch for more papers by this authorChia-Yao Lo, Chia-Yao Lo Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung, 20224 TaiwanSearch for more papers by this authorJia-Ming Liu, Jia-Ming Liu Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, 90095 USASearch for more papers by this authorWan-Shao Tsai, Wan-Shao Tsai Department of Electric Engineering and Graduate Institute of Optoelectronic Engineering, National Chung Hsing University, Taichung, 40227 TaiwanSearch for more papers by this authorMing-Hung Li, Ming-Hung Li Department of Physics, National Dong Hwa University, Hualien, 974301 TaiwanSearch for more papers by this authorSin-Jhang Yang, Sin-Jhang Yang Department of Physics, National Dong Hwa University, Hualien, 974301 TaiwanSearch for more papers by this authorCheng-Chia Lin, Cheng-Chia Lin Department of Opto-Electronic Engineering, National Dong Hwa University, Hualien, 974301 TaiwanSearch for more papers by this authorShien-Der Tzeng, Shien-Der Tzeng Department of Physics, National Dong Hwa University, Hualien, 974301 TaiwanSearch for more papers by this authorYuan-Ron Ma, Yuan-Ron Ma Department of Physics, National Dong Hwa University, Hualien, 974301 TaiwanSearch for more papers by this authorMing-Yi Lin, Ming-Yi Lin Department of Dermatology, National Taiwan University Hospital and College of Medicine, National Taiwan University, Taipei, 100229 TaiwanSearch for more papers by this authorChien-Chih Lai, Chien-Chih Lai Department of Physics, National Dong Hwa University, Hualien, 974301 Taiwan Department of Opto-Electronic Engineering, National Dong Hwa University, Hualien, 974301 TaiwanSearch for more papers by this author First published: 23 March 2021 https://doi.org/10.1002/adma.202170092AboutPDF 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 onFacebookTwitterLinked InRedditWechat Abstract In article number 2006819, Chien-Chih Lai and co-workers report the first demonstration of a diode-pumped ultralow-threshold continuous-wave room-temperature perovskite laser, by coating MAPbI3 nanocrystallites onto a high-quality yttrium aluminum garnet (YAG) crystal fiber. The atomically smooth crystal fiber not only serves as a perfect microcavity for ultralow-loss optical resonance but also facilitates heat dissipation toward robust laser devices, outperforming previously reported structures. This readies the ground for electrically driven lasers for all-optical photonic integration. Volume33, Issue12March 25, 20212170092 RelatedInformation