Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/48266
Título: | Intense optical second harmonic generation from centrosymmetric nanocrystalline para-nitroaniline |
Autor(es): | Isakov, Dmitry Belsley, M. Gomes, E. Matos Goncalves, Hugo Schellenberg, Peter Almeida, B. G. |
Data: | 5-Mai-2014 |
Editora: | American Institute of Physics |
Revista: | Applied Physics Letters |
Resumo(s): | We demonstrate an approach that uses normally centrosymmetric, but highly polarizable organic molecules of para-nitroaniline (p-NA) as very efficient second harmonic generator (SHG) for near infra-red light. The approach is based on an effective manipulation of the nanocrystalline size and their assembly into a highly orientated mesocrystalline structures. The resulting mesocrystalline form of p-NA consists of multiple nanocrystals with common orientation, providing a set of surfaces with highly aligned molecules forming a head-to-tail polar arrangement. The second harmonic generation efficiency from this arrangement of mesocrystalline nanostructures is comparable to that from the conventional non-centrosymmetric organic crystals. The experimental results indicate that a very strong second-order nonlinear response can be obtained from small D-p-A organic molecules with elevated molecular hyperpolarizabilities even if these molecules tend to crystallize in centrosymmetric structures. (C) 2014 AIP Publishing LLC. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/48266 |
DOI: | 10.1063/1.4875908 |
ISSN: | 0003-6951 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDF - FAMO - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Appl. Phys. Lett. 2014 Isakov.pdf Acesso restrito! | 776,09 kB | Adobe PDF | Ver/Abrir |