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Issue 7, 2020
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Optical nonlinearity of zeolitic imidazolate framework-67 in the near-infrared region

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Abstract

In this paper, we report the large optical nonlinearities of zeolitic imidazolate framework-67 (ZIF-67) in the near-infrared (NIR) region. Typical Z-scan techniques were carried out to determine the nonlinear optical (NLO) performance of ZIF-67 at 1.06 and 1.34 μm. With increased excitation pump intensity, a reinforcement of the saturable absorption was observed. With the excitation wavelength at 1.06 μm, the largest effective nonlinear absorption coefficient βeff was −0.85 cm GW−1 and the highest modulation depth ΔT was 29.1%. For a wavelength of 1.34 μm, the maximum βeff and ΔT of ZIF-67 were −0.87 cm GW−1 and 19.8%, respectively. The complete optical limiting behavior of ZIF-67 was also investigated with increased pump intensity. The large two-photon absorption (TPA) cross sections (∼8.5 × 106 GM) made ZIF-67 suitable for possible applications as optical limiting devices. In addition, the nonlinear refractive index n2, and real and imaginary parts of the third-order NLO susceptibility were also determined. This work explores the NLO properties of ZIF-67 in the NIR regime comprehensively and will benefit potential NLO-based applications of optical modulators, optoelectronics and optical limiting devices.

Graphical abstract: Optical nonlinearity of zeolitic imidazolate framework-67 in the near-infrared region

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Article information


Submitted
09 Apr 2020
Accepted
30 Apr 2020
First published
07 May 2020

Mater. Chem. Front., 2020,4, 2081-2088
Article type
Research Article

Optical nonlinearity of zeolitic imidazolate framework-67 in the near-infrared region

H. Pan, H. Chu, X. Wang, Y. Li, S. Zhao, G. Li and D. Li, Mater. Chem. Front., 2020, 4, 2081
DOI: 10.1039/D0QM00226G

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