Please use this identifier to cite or link to this item:
https://hdl.handle.net/11499/47481
Title: | Defect Assisted Optical Limiting Performance of Hexagonal Boron Nitride Nanosheets in Aqueous Suspension and Pmma Nanocomposite Films |
Authors: | Unlu, Bekir Asilcan Karatay, Ahmet Yildiz, Elif Akhuseyin Yola, Mehmet Lutfi Yuksek, Mustafa Atar, Necip Elmali, Ayhan |
Keywords: | Boron Nitride Nanosheet Optical Limiting Nonlinear Absorption Photoluminescence |
Publisher: | Elsevier |
Abstract: | Defect-assisted nonlinear absorption (NLA) and optical limiting (OL) performance of hexagonal boron nitride nanosheets (h-BNNS) in aqueous suspension and in polymethyl methacrylate matrix (PMMA) as nanocomposite films were studied using open-aperture Z-scan method. To evaluate the transmission in open-aperture Z-scan data, a theoretical model accounting one photon absorption (OPA), two photon absorption (TPA), free carrier absorption (FCA) and saturation of each process was considered. Defect-assisted NLA coefficients and saturation intensity thresholds were extracted from the fitting of the experimental results for 532 and 1064 nm pulse wavelengths. Strong defect-assisted NLA response of h-BNNS was observed while NLA at 532 nm was considerably stronger. This is attributed to the excitation of a greater number of defect states over a wider energy range. Our findings showed that h-BNNS/PMMA nanocomposite films feature highly required properties in OL applications and can function in OL applications in a wide spectral range (-200-1064 nm). |
Description: | Yuksek, Mustafa/0000-0003-2169-1827; Karatay, Ahmet/0000-0001-9373-801X; Unlu, Bekir Asilcan/0000-0001-7815-362X |
URI: | https://doi.org/10.1016/j.optmat.2021.111630 |
ISSN: | 0925-3467 1873-1252 |
Appears in Collections: | Mühendislik Fakültesi Koleksiyonu Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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File | Size | Format | |
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WOS000706786300008.pdf | 3.64 MB | Adobe PDF | View/Open |
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