Low threshold lasing emissions from a single upconversion nanocrystal

Shang，Yunfei1,2,3; Zhou，Jiajia1; Cai，Yangjian3; Wang，Fan1; Fernandez-Bravo，Angel4; Yang，Chunhui2; Jiang，Lei5; Jin，Dayong1,3

2020-12-01

10.1038/s41467-020-19797-4

Nature Communications   影响因子和分区

2041-1723

2041-1723

Cross-relaxation among neighboring emitters normally causes self-quenching and limits the brightness of luminescence. However, in nanomaterials, cross-relaxation could be well-controlled and employed for increasing the luminescence efficiency at specific wavelengths. Here we report that cross-relaxation can modulate both the brightness of single upconversion nanoparticles and the threshold to reach population inversion, and both are critical factors in producing the ultra-low threshold lasing emissions in a micro cavity laser. By homogenously coating a 5-μm cavity with a single layer of nanoparticles, we demonstrate that doping Tm ions at 2% can facilitate the electron accumulation at the intermediate state of H level and efficiently decrease the lasing threshold by more than one order of magnitude. As a result, we demonstrate up-converted lasing emissions with an ultralow threshold of continuous-wave excitation of ~150 W/cm achieved at room temperature. A single nanoparticle can lase with a full width at half-maximum as narrow as ~0.45 nm.

SCI

英语

NI论文

其他

ARC Discovery Early Career Researcher Award Scheme[DE180100669] ; China Scholarship Council Scholarships[201706120322] ; National Natural Science Foundation of China (NSFC)[61729501] ; Major International (Regional) Joint Research Project of NSFC[51720105015] ; Science and Technology Innovation Commission of Shenzhen[KQTD20170810110913065] ; Australia China Science and Research Fund Joint Research Centre for Point-of-Care Testing[ACSRF658277][SQ2017YFGH001190]

Science & Technology - Other Topics

Multidisciplinary Sciences

WOS:000598901500001

NATURE RESEARCH

2-s2.0-85096962481

Scopus

1.Institute for Biomedical Materials and Devices (IBMD),Faculty of Science,University of Technology Sydney,Sydney,2007,Australia
2.MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage,School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin,150001,China
3.UTS-SUStech Joint Research Centre for Biomedical Materials and Devices,Department of Biomedical Engineering,Southern University of Science and Technology,Shenzhen,China
4.Department of Physics,Politecnico di Milano,Milano,Piazza L. Da Vinci 32,20133,Italy
5.Laboratory of Bio inspired Smart Interface Science,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing,100190,China

Shang，Yunfei,Zhou，Jiajia,Cai，Yangjian,et al. Low threshold lasing emissions from a single upconversion nanocrystal[J]. Nature Communications,2020,11(1).

Shang，Yunfei.,Zhou，Jiajia.,Cai，Yangjian.,Wang，Fan.,Fernandez-Bravo，Angel.,...&Jin，Dayong.(2020).Low threshold lasing emissions from a single upconversion nanocrystal.Nature Communications,11(1).

Shang，Yunfei,et al."Low threshold lasing emissions from a single upconversion nanocrystal".Nature Communications 11.1(2020).