期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 14, 页码 12759-12765出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b01709
关键词
2D perovskite; nonlinear property; saturable absorbers; mode-locking ultrafast pulse fiber lasers
资金
- Youth 973 program [2015CB932700]
- National Key Research & Development Program [2016YFA0201902]
- National Natural Science Foundation of China [51290273, 91433107]
- Australian Research Council [DP140101501, CE170100039, FT 150100450]
- Department of Science and Technology of Jiangsu Province [BK20150053]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- Natural Science Foundation of Jiangsu Province [BK20130328]
- China Postdoctoral Science Foundation [2014M551654]
- Jiangsu Province Postdoctoral Science Foundation [1301020A]
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.
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