Dong Siyu, Zhang Cheng, Zhou Yuxiang, Miao Xiaona, Zong Tiantian, Gu Manna, Zhan Zijun, Chen Duo, Ma Hong, Gui Weiling, Liu Jie, Cheng Chen, Cheng Chuanfu
College of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
International School for Optoelectronic Engineering, Qilu University of Technology (Shandong Academy of Science), Jinan 250353, China.
Nanomaterials (Basel). 2021 Jun 23;11(7):1648. doi: 10.3390/nano11071648.
Hybrid organic-inorganic perovskite shows a great potential in the field of photoelectrics. Embedding methyl ammonium lead bromide (MAPbBr) in a mesoporous silica (mSiO) layer is an effective method for maintaining optical performance of MAPbBr at room temperature. In this work, we synthesized MAPbBr quantum dots, embedding them in the mSiO layer. The nonlinear optical responses of this composite thin film have been investigated by using the Z-scan technique at a wavelength of 800 nm. The results show plural nonlinear responses in different intensities, corresponding to one- and two-photon processing. Our results support that composites possess saturation intensity of ~27.29 GW/cm and varying nonlinear coefficients. The composite thin films show high stability under ultrafast laser irradiating. By employing the composite as a saturable absorber, a passively Q-switching laser has been achieved on a Nd:YVO all-solid-state laser platform to generate a laser at ~1 μm.
有机-无机杂化钙钛矿在光电领域展现出巨大潜力。将甲基溴化铅铵（MAPbBr）嵌入介孔二氧化硅（mSiO）层是在室温下维持MAPbBr光学性能的有效方法。在这项工作中，我们合成了MAPbBr量子点，并将其嵌入mSiO层。利用Z扫描技术在800 nm波长下研究了这种复合薄膜的非线性光学响应。结果表明，在不同强度下存在多种非线性响应，对应单光子和双光子过程。我们的结果表明，复合材料具有约27.29 GW/cm的饱和强度和变化的非线性系数。复合薄膜在超快激光辐照下表现出高稳定性。通过将该复合材料用作可饱和吸收体，在Nd:YVO全固态激光平台上实现了被动调Q激光，产生了约1μm的激光。
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