Improving Faraday rotation performance with block copolymer and FePt nanoparticle magneto-optical composite
Magneto-optical (MO) composites with excellent Faraday rotation (FR) response were fabricated using iron platinum (FePt) nanoparticles (NPs) and polystyrene-block-poly (2-vinyl pyridine) (PS-b-P2VP) block copolymers (BCPs). Gallic acid functionalized FePt NPs with average core diameters (dcore) of 1...
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OPTICAL SOC AMER
2017
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ndltd-arizona.edu-oai-arizona.openrepository.com-10150-6249702017-07-29T03:00:38Z Improving Faraday rotation performance with block copolymer and FePt nanoparticle magneto-optical composite Miles, Alexander Gai, Yue Gangopadhyay, Palash Wang, Xinyu Norwood, Robert A. Watkins, James J. Univ Arizona, Coll Opt Sci Magneto-optical (MO) composites with excellent Faraday rotation (FR) response were fabricated using iron platinum (FePt) nanoparticles (NPs) and polystyrene-block-poly (2-vinyl pyridine) (PS-b-P2VP) block copolymers (BCPs). Gallic acid functionalized FePt NPs with average core diameters (dcore) of 1.9, 4.9, 5.7 and 9.3 nm have been selectively incorporated into a P2VP domain through hydrogen bonding interactions. The use of copolymer templates to selectively arrange the magnetic NPs guaranteed high MO performance with little trade-off in terms of scattering loss, providing a simple strategy to prepare functional materials for MO applications. As a result, Verdet constants of a 10 wt % loaded 4.9 nm FePt NP composite reached absolute magnitudes as high as similar to-6 x 104 degrees/T-m at 845 nm, as determined by FR measurements at room temperature. At the same time, the MO figure-of-merit was as large as -25 degrees/T in these composites, indicating both excellent MO performance and transparency. The dependence of the nanocomposite FR properties on particle diameter, loading (from 0.1 wt % to 10 wt %) and composite nanostructure were systematically investigated at four infrared wavelengths (845, 980, 1310 and 1550 nm). (C) 2017 Optical Society of America 2017-05-31 Article Improving Faraday rotation performance with block copolymer and FePt nanoparticle magneto-optical composite 2017, 7 (6):2126 Optical Materials Express 2159-3930 10.1364/OME.7.002126 http://hdl.handle.net/10150/624970 http://arizona.openrepository.com/arizona/handle/10150/624970 Optical Materials Express en https://www.osapublishing.org/abstract.cfm?URI=ome-7-6-2126 © 2017 Optical Society of America OPTICAL SOC AMER |
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en |
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description |
Magneto-optical (MO) composites with excellent Faraday rotation (FR) response were fabricated using iron platinum (FePt) nanoparticles (NPs) and polystyrene-block-poly (2-vinyl pyridine) (PS-b-P2VP) block copolymers (BCPs). Gallic acid functionalized FePt NPs with average core diameters (dcore) of 1.9, 4.9, 5.7 and 9.3 nm have been selectively incorporated into a P2VP domain through hydrogen bonding interactions. The use of copolymer templates to selectively arrange the magnetic NPs guaranteed high MO performance with little trade-off in terms of scattering loss, providing a simple strategy to prepare functional materials for MO applications. As a result, Verdet constants of a 10 wt % loaded 4.9 nm FePt NP composite reached absolute magnitudes as high as similar to-6 x 104 degrees/T-m at 845 nm, as determined by FR measurements at room temperature. At the same time, the MO figure-of-merit was as large as -25 degrees/T in these composites, indicating both excellent MO performance and transparency. The dependence of the nanocomposite FR properties on particle diameter, loading (from 0.1 wt % to 10 wt %) and composite nanostructure were systematically investigated at four infrared wavelengths (845, 980, 1310 and 1550 nm). (C) 2017 Optical Society of America |
author2 |
Univ Arizona, Coll Opt Sci |
author_facet |
Univ Arizona, Coll Opt Sci Miles, Alexander Gai, Yue Gangopadhyay, Palash Wang, Xinyu Norwood, Robert A. Watkins, James J. |
author |
Miles, Alexander Gai, Yue Gangopadhyay, Palash Wang, Xinyu Norwood, Robert A. Watkins, James J. |
spellingShingle |
Miles, Alexander Gai, Yue Gangopadhyay, Palash Wang, Xinyu Norwood, Robert A. Watkins, James J. Improving Faraday rotation performance with block copolymer and FePt nanoparticle magneto-optical composite |
author_sort |
Miles, Alexander |
title |
Improving Faraday rotation performance with block copolymer and FePt nanoparticle magneto-optical composite |
title_short |
Improving Faraday rotation performance with block copolymer and FePt nanoparticle magneto-optical composite |
title_full |
Improving Faraday rotation performance with block copolymer and FePt nanoparticle magneto-optical composite |
title_fullStr |
Improving Faraday rotation performance with block copolymer and FePt nanoparticle magneto-optical composite |
title_full_unstemmed |
Improving Faraday rotation performance with block copolymer and FePt nanoparticle magneto-optical composite |
title_sort |
improving faraday rotation performance with block copolymer and fept nanoparticle magneto-optical composite |
publisher |
OPTICAL SOC AMER |
publishDate |
2017 |
url |
http://hdl.handle.net/10150/624970 http://arizona.openrepository.com/arizona/handle/10150/624970 |
work_keys_str_mv |
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