CsPbBr3 perovskite quantum dots: saturable absorption properties and passively Q-switched visible lasers

Jingzhou Li; Hongxing Dong; Bin Xu; Saifeng Zhang; Zhiping Cai; Jun Wang; Long Zhang

doi:10.1364/PRJ.5.000457

Journals >Photonics Research >Volume 5 >Issue 5 >Page 457 > Article

Photonics Research
Vol. 5, Issue 5, 457 (2017)

CsPbBr3 perovskite quantum dots: saturable absorption properties and passively Q-switched visible lasers

Jingzhou Li^1、2, Hongxing Dong^1、3, Bin Xu⁴, Saifeng Zhang¹, Zhiping Cai⁴, Jun Wang¹, and Long Zhang^1、5、*

Author Affiliations

¹Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai 201800, China

²University of Chinese Academy of Sciences, Beijing 100049, China

³e-mail: hongxingd@siom.ac.cn

⁴Department of Electronic Engineering, Xiamen University, Xiamen 361005, China

⁵IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China

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DOI: 10.1364/PRJ.5.000457 Cite this Article Set citation alerts

Jingzhou Li, Hongxing Dong, Bin Xu, Saifeng Zhang, Zhiping Cai, Jun Wang, Long Zhang. CsPbBr3 perovskite quantum dots: saturable absorption properties and passively Q-switched visible lasers[J]. Photonics Research, 2017, 5(5): 457 Copy Citation Text

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(a) TEM image of the CsPbBr3 perovskite QDs. (b) High-resolution TEM image of a single QD. (c) Schematic of the CsPbBr3 perovskite lattice. (d) Normalized linear absorption (black) and PL (red) spectra for the CsPbBr3 perovskite QD dispersion. (e) PL decay kinetics of the CsPbBr3 perovskite QDs under excitation at 405 nm.

Fig. 1. (a) TEM image of the CsPbBr3 perovskite QDs. (b) High-resolution TEM image of a single QD. (c) Schematic of the CsPbBr3 perovskite lattice. (d) Normalized linear absorption (black) and PL (red) spectra for the CsPbBr3 perovskite QD dispersion. (e) PL decay kinetics of the CsPbBr3 perovskite QDs under excitation at 405 nm.

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(a) Open-aperture Z-scan results of CsPbBr3 perovskite QDs under excitation of 515 nm, with a 1 kHz repetition rate at different intensities. (b) Normalized transmission as a function of intensity for the 15.6 GW cm−2 curve in (a).

Fig. 2. (a) Open-aperture Z-scan results of CsPbBr3 perovskite QDs under excitation of 515 nm, with a 1 kHz repetition rate at different intensities. (b) Normalized transmission as a function of intensity for the 15.6 GW cm−2 curve in (a).

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Fig. 3. Passively Q-switched laser results for the CsPbBr3 perovskite QDs as saturable absorbers: (a) pulse trains measured at average output powers of 9.1 mW with a repetition rate of 96.2 kHz, (b) single pulse waveform, and (c) output laser spectrum. The inset shows the output beam spot.

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Fig. 4. (a) Laser output power characteristics of Q-switched modes. (b) Variations of pulsewidths and pulse repetition rates with increasing absorbed pump powers for the 522 nm Q-switched visible laser.

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Material	$λ$ (nm)	T (%)	$α_{NL}$ ( $cm / GW$ , $\times 10^{- 2}$ )	FOM (esu cm, $\times 10^{- 14}$ )	I_s ( $GW / {cm}^{2}$ )	Reference
${CsPbBr}_{3}$ QDs	515	93	−35	3.7	11	This work
CdTe/CdS QDs	515	84	−13	2.1	9	[19]
${MoS}_{2}$	515	86	−1.9	0.47	72	[19,21]
Graphene	515	74	−1.2	0.15	265	[19,21]
Black phosphorous	400	71	−1.6	N/A	455	[22]
${Bi}_{2} {Se}_{3}$	800	N/A	N/A	N/A	10	[23]