Two-Dimensional CH3NH3PbI3Perovskite Nanosheets for Ultrafast Pulsed Fiber Lasers.
Even though the nonlinear optical effects of solution processed organic-inorganic perovskite films have been studied, the nonlinear optical properties in two-dimensional (2D) perovskites, especially their applications for ultrafast photonics, are largely unexplored. In comparison to bulk perovskite films, 2D perovskite nanosheets with small thicknesses of a few unit cells are more suitable for investigating the intrinsic nonlinear optical properties because bulk recombination of photocarriers and the nonlinear scattering are relatively small. In this research, we systematically investigated the nonlinear optical properties of 2D perovskite nanosheets derived from a combined solution process and vapor phase conversion method. It was found that 2D perovskite nanosheets have stronger saturable absorption properties with large modulation depth and very low saturation intensity compared with those of bulk perovskite films. Using an all dry transfer method, we constructed a new type of saturable absorber device based on single piece 2D perovskite nanosheet. Stable soliton state mode-locking was achieved, and ultrafast picosecond pulses were generated at 1064 nm. This work is likely to pave the way for ultrafast photonic and optoelectronic applications based on 2D perovskites.
Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215123, China.
Pengfei
P
Li
Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215123, China.
Yao
Y
Chen
Centre for Micro-Photonics, Faculty of Science Engineering and Technology, Swinburne University of Technology , Hawthorn VIC 3122, Australia.
Tieshan
T
Yang
Department of Materials Science and Engineering, Monash University , Clayton, Victoria 3800, Australia.
Ziyu
http://orcid.org/0000-0002-0959-4787
Z
Wang
Centre for Micro-Photonics, Faculty of Science Engineering and Technology, Swinburne University of Technology , Hawthorn VIC 3122, Australia.
Han
H
Lin
College of Electronic Science and Technology, SZU-NUS Collaborative Innovation Centre for Optoelectronic Science & Technology, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University , Shenzhen 518000, China.
Yanhua
Y
Xu
Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University , Xuzhou 221116, China.
Lei
L
Li
Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215123, China.
Haoran
H
Mu
Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215123, China.
Bannur Nanjunda
BN
Shivananju
College of Electronic Science and Technology, SZU-NUS Collaborative Innovation Centre for Optoelectronic Science & Technology, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University , Shenzhen 518000, China.
Yupeng
http://orcid.org/0000-0003-2351-5579
Y
Zhang
College of Physics and Microelectronics Science, Key Laboratory for MicroNano Physics and Technology of Hunan Province, Hunan University , Changsha 410082, China.
Qinglin
Q
Zhang
College of Physics and Microelectronics Science, Key Laboratory for MicroNano Physics and Technology of Hunan Province, Hunan University , Changsha 410082, China.
Anlian
http://orcid.org/0000-0003-3335-3067
A
Pan
Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215123, China.
Shaojuan
S
Li
Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University , Xuzhou 221116, China.
Dingyuan
D
Tang
Centre for Micro-Photonics, Faculty of Science Engineering and Technology, Swinburne University of Technology , Hawthorn VIC 3122, Australia.
Baohua
B
Jia
College of Electronic Science and Technology, SZU-NUS Collaborative Innovation Centre for Optoelectronic Science & Technology, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University , Shenzhen 518000, China.
Han
http://orcid.org/0000-0002-2197-7270
H
Zhang
Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215123, China.|Department of Materials Science and Engineering, Monash University , Clayton, Victoria 3800, Australia.
Qiaoliang
http://orcid.org/0000-0002-6971-789X
Q
Bao
2D perovskite; mode-locking; nonlinear property; saturable absorbers; ultrafast pulse fiber lasers