Integration of nanoscale light emitters: an efficient ultraviolet and blue random lasing from NaYF<sub>4</sub>:Yb/Tm hexagonal nanocrystals

Ya-Pei Peng; Wei Lu; Pengpeng Ren; Yiqun Ni; Yunfeng Wang; Long Zhang; Yu-Jia Zeng; Wenfei Zhang; Shuangchen Ruan

doi:doi:10.1364/PRJ.6.000943

Photonics Research, 2018, 6 (10): 10000943, Published Online: Sep. 25, 2018

Integration of nanoscale light emitters: an efficient ultraviolet and blue random lasing from NaYF₄:Yb/Tm hexagonal nanocrystals

Ya-Pei Peng ¹Wei Lu ²Pengpeng Ren ¹Yiqun Ni ¹Yunfeng Wang ³Long Zhang ⁴Yu-Jia Zeng ¹Wenfei Zhang ^1,5,*Shuangchen Ruan ^1,6,*

Author Affiliations

¹ Shenzhen Key Laboratory of Laser Engineering, Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

² University Research Facility in Materials Characterization and Device Fabrication, The Hong Kong Polytechnic University, Hong Kong 999077, China

³ Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong 999077, China

⁴ Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

⁵ e-mail: zhangwf@szu.edu.cn

⁶ e-mail: scruan@szu.edu.cn

Figures & Tables

Fig. 1. (a) TEM image and HR-TEM image (inset), (b) SAED pattern, (c) size distribution, and (d) XRD pattern of the NaYF4:Yb,Tm NCs.

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Fig. 2. (a) Schematic diagram of energy levels and transitions of Yb3+ and Tm3+ ions by 980 nm pumping. (b) Upconversion luminescence spectra of NaYF4:20%Yb,2%Tm by 980 nm excitation at room temperature. The inset of (b) is the plot of peak intensity ratios, I345/I364, I346/I450, and I450/I474 versus Ip.

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Fig. 3. Emission spectra versus different excitation power at (a) 345 nm and (b) 474 nm. The insets of (a) and (b) are the FWHM of the emission spectra of NCs lasers. (c) and (d) Output intensity and FWHM of the emission spectra at 345 nm and 474 nm versus different pump power density. Emission spectra at different observation angles at (e) 345 nm and (f) 474 nm. The left inset of (e) is the optical microscope image of the NaYF4:20%Yb,2%Tm NCs film. The inset of (f) is the sandwich structure of the proposed NaYF4:Yb,Tm NCs lasers.

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Ya-Pei Peng, Wei Lu, Pengpeng Ren, Yiqun Ni, Yunfeng Wang, Long Zhang, Yu-Jia Zeng, Wenfei Zhang, Shuangchen Ruan. Integration of nanoscale light emitters: an efficient ultraviolet and blue random lasing from NaYF₄:Yb/Tm hexagonal nanocrystals[J]. Photonics Research, 2018, 6(10): 10000943.

Integration of nanoscale light emitters: an efficient ultraviolet and blue random lasing from NaYF₄:Yb/Tm hexagonal nanocrystals

Fig. 1. (a) TEM image and HR-TEM image (inset), (b) SAED pattern, (c) size distribution, and (d) XRD pattern of the NaYF4:Yb,Tm NCs.

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Integration of nanoscale light emitters: an efficient ultraviolet and blue random lasing from NaYF4:Yb/Tm hexagonal nanocrystals

Fig. 1. (a) TEM image and HR-TEM image (inset), (b) SAED pattern, (c) size distribution, and (d) XRD pattern of the NaYF4:Yb,Tm NCs.

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Integration of nanoscale light emitters: an efficient ultraviolet and blue random lasing from NaYF₄:Yb/Tm hexagonal nanocrystals