Nanomaterials (Jun 2021)

High-Stability Hybrid Organic-Inorganic Perovskite (CH<sub>3</sub>NH<sub>3</sub>PbBr<sub>3</sub>) in SiO<sub>2</sub> Mesopores: Nonlinear Optics and Applications for Q-Switching Laser Operation

  • Siyu Dong,
  • Cheng Zhang,
  • Yuxiang Zhou,
  • Xiaona Miao,
  • Tiantian Zong,
  • Manna Gu,
  • Zijun Zhan,
  • Duo Chen,
  • Hong Ma,
  • Weiling Gui,
  • Jie Liu,
  • Chen Cheng,
  • Chuanfu Cheng

DOI
https://doi.org/10.3390/nano11071648
Journal volume & issue
Vol. 11, no. 7
p. 1648

Abstract

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Hybrid organic-inorganic perovskite shows a great potential in the field of photoelectrics. Embedding methyl ammonium lead bromide (MAPbBr3) in a mesoporous silica (mSiO2) layer is an effective method for maintaining optical performance of MAPbBr3 at room temperature. In this work, we synthesized MAPbBr3 quantum dots, embedding them in the mSiO2 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/cm2 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:YVO4 all-solid-state laser platform to generate a laser at ~1 μm.

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