Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/53471

TitleEfficient second harmonic generation by para-nitroaniline embedded in electro-spun polymeric nanofibres
Author(s)Gonçalves, Hugo Manuel Castro
Saavedra, Inês
Ferreira, Rute A. S.
Lopes, P. E.
Gomes, Etelvina de Matos
Belsley, M.
KeywordsSecond harmonic light
Electrospinning
Polymeric fibres
Nonlinear optics
Breaking of centrosymmetry
Polarimetry
Issue date14-Mar-2018
PublisherIOP Publishing
JournalJournal of Physics D: Applied Physics
Abstract(s)Intense well polarized second harmonic light was generated by poly(methyl methacrylate) nanofibres with embedded para-nitroaniline nanocrystals. Subwavelength diameter fibres were electro-spun using a 1.2 weight ratio of chromophore to polymer. Analysis of the generated second harmonic light indicates that the para-nitroaniline molecules, which nominally crystalize in the centrosymmetric space group, were organized into noncentrosymmetric structures leading to a second order susceptibility dominated by a single tensor element. Under the best deposition conditions, the nanofibrers display an effective nonlinear optical susceptibility approximately two orders of magnitude greater than that of potassium dihydrogen phosphate. Generalizing this approach to a broad range of organic molecules with strong individual molecular second order nonlinear responses, but which nominally form centrosymmetric organic crystals, could open a new pathway for the fabrication of efficient sub-micron sized second harmonic light generators.
TypeArticle
URIhttp://hdl.handle.net/1822/53471
DOI10.1088/1361-6463/aaa9da
ISSN0022-3727
Peer-Reviewedyes
AccessOpen access
Appears in Collections:CDF - FAMO - Artigos/Papers (with refereeing)

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