Mode selection and high-quality upconversion lasing from perovskite CsPb<sub>2</sub>Br<sub>5</sub> microplates

Zhengzheng Liu; Chunwei Wang; Zhiping Hu; Juan Du; Jie Yang; Zeyu Zhang; Tongchao Shi; Weimin Liu; Xiaosheng Tang; Yuxin Leng

doi:doi:10.1364/PRJ.399960

Photonics Research, 2020, 8 (9): 09000A31, Published Online: Sep. 3, 2020

Mode selection and high-quality upconversion lasing from perovskite CsPb₂Br₅ microplates Download： 630次

Zhengzheng Liu ^1,2†Chunwei Wang ^1,3,4†Zhiping Hu ^2,5Juan Du ^1,2,4,6,*Jie Yang ⁵Zeyu Zhang ^1,2Tongchao Shi ^1,2Weimin Liu ³Xiaosheng Tang ^5,7,*Yuxin Leng ^1,2,3,4,8,*

Author Affiliations

¹ State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China

² Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China

³ School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China

⁴ Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

⁵ Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China

⁶ e-mail: dujuan@mail.siom.ac.cn

⁷ e-mail: xstang@cqu.edu.cn

⁸ e-mail: lengyuxinn@mail.siom.ac.cn

Figures & Tables

Fig. 1. Optical characterizations of perovskite CsPb2Br5 microplates. (a) SEM image. The scale bar is 10 μm. (b) Schematic crystal structure. (c) Experimental and standard powder XRD patterns of tetragonal CsPb2Br5. (d) Linear absorption (green) and PL spectrum (red).

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Fig. 2. TA spectra of perovskite CsPb2Br5. (a) 2D pseudo-color TA spectra. (b) TA spectra at different delay times. (c) The kinetics of prominent PB signal. (d) The kinetics of SE. Inset: a magnified view of the spectroscopic signature of SE before 11 ps.

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Fig. 3. Temperature-dependent ASE actions from CsPb2Br5 microplates. (a) The PL spectra of two-photon pumped ASE at 300 K. Inset: photograph of the CsPb2Br5 microplate excited above ASE threshold by a cylindrical lens. (b) The integrated intensity and FWHM with respect to pump intensity. (c) Normalized PL intensity as a function of excitation intensity at different temperatures. (d) Pump threshold intensity versus temperature. The solid red line is the fit according to Eq. (1).

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Fig. 4. F-P mode lasing characterization of a single CsPb2Br5 microplate. (a) Pump-intensity-dependent emission spectra under two-photon excitation. Inset: the bright-field optical image and emission photograph from the single microplate above the lasing threshold, indicating the F-P mode. The scale bar is 5 μm. (b) Output intensity (blue) and FWHM (red) of laser with increasing pump fluence. (c) Fitting of the lasing oscillation mode. The FWHM is 0.15 nm with a quality factor of ∼3551.

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Fig. 5. WGM lasing characterization of a single CsPb2Br5 microplate. (a) Pump-intensity-dependent emission spectra under two-photon excitation. Inset: the bright-field optical image and the emission photograph from the single CsPb2Br5 microplate above the lasing threshold, indicating the WGM lasing. The scale bar is 5 μm. (b) Output intensity (red) and FWHM (blue) of laser with increasing pump fluence. (c) Fitting of the lasing oscillation mode. The FWHM is 0.16 nm with a quality factor of ∼3374.

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Fig. 6. Log–log plot of the integrated PL intensity as a function of the pump fluence under two-photon excitation.

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Fig. 7. Pump-intensity-dependent SE dynamics.

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Fig. 8. Normalized integrated intensity for microplates under pulsed excitation.

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Fig. 9. Two-photon pumped intensity-dependent emission spectra from a single CsPb2Br5 microplate in the F-P cavity.

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Fig. 10. Center lasing position of the CsPb2Br5 F-P mode laser.

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Fig. 11. Two-photon pumped intensity-dependent emission spectra from a single CsPb2Br5 microplate in the WGM cavity.

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Fig. 12. Center lasing position of the CsPb2Br5 WGM laser.

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Zhengzheng Liu, Chunwei Wang, Zhiping Hu, Juan Du, Jie Yang, Zeyu Zhang, Tongchao Shi, Weimin Liu, Xiaosheng Tang, Yuxin Leng. Mode selection and high-quality upconversion lasing from perovskite CsPb₂Br₅ microplates[J]. Photonics Research, 2020, 8(9): 09000A31.

Mode selection and high-quality upconversion lasing from perovskite CsPb₂Br₅ microplates Download： 630次

Fig. 1. Optical characterizations of perovskite CsPb2Br5 microplates. (a) SEM image. The scale bar is 10 μm. (b) Schematic crystal structure. (c) Experimental and standard powder XRD patterns of tetragonal CsPb2Br5. (d) Linear absorption (green) and PL spectrum (red).

Fig. 2. TA spectra of perovskite CsPb2Br5. (a) 2D pseudo-color TA spectra. (b) TA spectra at different delay times. (c) The kinetics of prominent PB signal. (d) The kinetics of SE. Inset: a magnified view of the spectroscopic signature of SE before 11 ps.

Fig. 6. Log–log plot of the integrated PL intensity as a function of the pump fluence under two-photon excitation.

Fig. 7. Pump-intensity-dependent SE dynamics.

Fig. 8. Normalized integrated intensity for microplates under pulsed excitation.

Fig. 9. Two-photon pumped intensity-dependent emission spectra from a single CsPb2Br5 microplate in the F-P cavity.

Fig. 10. Center lasing position of the CsPb2Br5 F-P mode laser.

Fig. 11. Two-photon pumped intensity-dependent emission spectra from a single CsPb2Br5 microplate in the WGM cavity.

Fig. 12. Center lasing position of the CsPb2Br5 WGM laser.

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Mode selection and high-quality upconversion lasing from perovskite CsPb2Br5 microplates Download： 630次

Fig. 1. Optical characterizations of perovskite CsPb2Br5 microplates. (a) SEM image. The scale bar is 10 μm. (b) Schematic crystal structure. (c) Experimental and standard powder XRD patterns of tetragonal CsPb2Br5. (d) Linear absorption (green) and PL spectrum (red).

Fig. 2. TA spectra of perovskite CsPb2Br5. (a) 2D pseudo-color TA spectra. (b) TA spectra at different delay times. (c) The kinetics of prominent PB signal. (d) The kinetics of SE. Inset: a magnified view of the spectroscopic signature of SE before 11 ps.

Fig. 6. Log–log plot of the integrated PL intensity as a function of the pump fluence under two-photon excitation.

Fig. 7. Pump-intensity-dependent SE dynamics.

Fig. 8. Normalized integrated intensity for microplates under pulsed excitation.

Fig. 9. Two-photon pumped intensity-dependent emission spectra from a single CsPb2Br5 microplate in the F-P cavity.

Fig. 10. Center lasing position of the CsPb2Br5 F-P mode laser.

Fig. 11. Two-photon pumped intensity-dependent emission spectra from a single CsPb2Br5 microplate in the WGM cavity.

Fig. 12. Center lasing position of the CsPb2Br5 WGM laser.

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Mode selection and high-quality upconversion lasing from perovskite CsPb₂Br₅ microplates Download： 630次