Robust low threshold full-color upconversion lasing in rare-earth activated nanocrystal-in-glass microcavity

Zhigang Gao; Lugui Cui; Yushi Chu; Luyue Niu; Lehan Wang; Rui Zhao; Yulong Yang; Xiaofeng Liu; Jing Ren; Guoping Dong

doi:10.1038/s41377-024-01671-3

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Robust low threshold full-color upconversion lasing in rare-earth activated nanocrystal-in-glass microcavity

Original Articles

- Robust low threshold full-color upconversion lasing in rare-earth activated nanocrystal-in-glass microcavity
- Light: Science & Applications Vol. 14, Issue 3, Pages: 656-664(2025)
- Affiliations：
  
  1.College of Physics and Electronic Engineering, Taishan University, 271021 Taian, China
  2.Key Laboratory of In-fiber Integrated Optics of Ministry of Education, College of Physics and Optoelectronic Engineering, Harbin Engineering University, 150001 Harbin, China
  3.School of Materials Science and Engineering, Zhejiang University, Hangzhou, China
  4.State Key Laboratory of Luminescent Materials and Devices, and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Engineering, South China University of Technology, 510640 Guangzhou, China
- Author bio：
  
  Jing Ren (ren.jing@hrbeu.edu.cn)
  Guoping Dong (dgp@scut.edu.cn)
- Funds：
- DOI：10.1038/s41377-024-01671-3
  CLC：
- Received：25 June 2024，
  
  Revised：20 October 2024，
  
  Accepted：2024-10-24，
  
  Published Online：02 January 2025，
  
  Published：31 March 2025
- Accepted：
Scan QR Code
Gao, Z. G. et al. Robust low threshold full-color upconversion lasing in rare-earth activated nanocrystal-in-glass microcavity. Light: Science & Applications, 14, 656-664 (2025).
DOI：

Gao, Z. G. et al. Robust low threshold full-color upconversion lasing in rare-earth activated nanocrystal-in-glass microcavity. Light: Science & Applications, 14, 656-664 (2025). DOI： 10.1038/s41377-024-01671-3.

摘要

Abstract

Visible light microlasers are essential building blocks for integrated photonics. However

achieving low-threshold (μW)

continuous-wave (CW) visible light lasing at

room temperature (RT) has been a challenge because of the formidable requirement of population inversion at short wavelengths. Rare-earth (RE)-activated microcavities

featuring high-quality factor (

) and small mode volume of whispering gallery modes

offer a great opportunity for achieving infrared-to-visible upconversion (UC) lasing. Here

we report that batch-produced nano-glass composite (GC) microspheres incorporating RE-doped fluoride nanocrystals show efficient UC emissions. These multi-phase composite microspheres exhibit a high

value (≥10

)

comparable to that of conventional multi-component glass microspheres. The UC lasing with pure red

green

and blue (RGB) emissions are demonstrated based on a highly efficient tapered fiber-microsphere system. More importantly

the GC microspheres manifest reduced (by 45%) lasing threshold and enhanced (more than four times) slope efficiency. These characteristics

together with excellent long-term stability

suggest a promising solution to achieving highly robust

stand-alone

low-threshold

and versatile UC microlasers.

关键词

Keywords

references

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