Journal
OPTICAL MATERIALS
Volume 128, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.optmat.2022.112467
Keywords
Nonlinear optics; Z-scan; Transient absorption; Optical limiting
Categories
Funding
- National Natural Science Foundation of China [11804244, 11704273, 22008164]
- Natural Science Foundation of Jiangsu Province [BK20180965, BK20170375, BK20190939]
- Jiangsu Key Disciplines of the Fourteenth Five-Year Plan [2021135]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [19KJB150018]
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The ultrafast optical nonlinearity of a pyrene-based ferrocene derivative (Py-Fc) was systematically studied, revealing its ultrafast broadband absorption in the visible wavelength region and its strong optical limiting properties through different absorption mechanisms. Additionally, negative nonlinear optical refraction from the excited state was observed.
The ultrafast optical nonlinearity of a pyrene-based ferrocene derivative (Py-Fc) is systematically studied via Zscan, transient absorption spectrum (TAS), and phase object pump probe (POPP). An ultrafast broadband absorption in visible wavelength region is observed via TAS. Based on this finding, nonlinear optical absorption of the material is investigated at various wavelengths. Results indicate that different absorption mechanisms, including reverse saturable absorption and two-photon induced excited state absorption involve in the nonlinear absorption in visible spectrum. The cooperation between the two mechanisms brings strong optical limiting properties. In addition, negative nonlinear optical refraction from the excited state is observed in POPP experiment and its dynamics is discussed. These results demonstrate that the molecular Py-Fc exhibits strong optical limiting, suggesting it is a potential material for ultrafast laser protection.
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