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http://hdl.handle.net/1843/46597| Tipo: | Artigo de Periódico |
| Título: | Optical nanoantennas for tip-enhanced Raman spectroscopy |
| Autor(es): | Thiago de Lourenço e Vasconcelos Bráulio Soares Archanjo Bruno Santos de Oliveira William F. Silva Rafael Silva Alencar Cassiano Rabelo e Silva Carlos Alberto Achete Ado Jorio de Vasconcelos Luiz Gustavo de Oliveira Lopes Cançado |
| Resumo: | The role of plasmon resonance on the optical efficiency of nanoantennas for tip-enhanced Raman spectroscopy (TERS) is reviewed. Technical details on surface plasmon polaritons (SPP), localized surface plasmon resonance (LSPR), and the plasmon gap mode are provided. Nanotechnology engineering is necessary to adequate the nanoantenna’s size, shape and composition to match resonance conditions with the exciting radiation source. Computational simulation guides the development of new types of plasmonic nanoantennas with different materials and morphologies, specially designed to reach target applications. An overview on a recently developed nanoantenna composed by a truncated micropyramidal body with a nanopyramid end is presented. The characteristic length L of the nanopyramid tip is dimensioned to fine-tune LSPR modes, giving rise to the so-called plasmon-tunable tip pyramid (PTTP). The plasmonic properties of this type of probe were investigated by electron energy loss spectroscopy and computational simulations, reveling that PTTPs act as monopole nanoantennas. TERS results obtained with the PTTPs demonstrate the achievement of unprecedent levels of field enhancement mediated by LSPR with excellent reproducibility rate. |
| Assunto: | Nanotecnologia Espectroscopia de Raman Grafeno |
| Idioma: | eng |
| País: | Brasil |
| Editor: | Universidade Federal de Minas Gerais |
| Sigla da Instituição: | UFMG |
| Departamento: | ICX - DEPARTAMENTO DE FÍSICA |
| Tipo de Acesso: | Acesso Restrito |
| Identificador DOI: | https://doi.org/10.1109/JSTQE.2020.3008526 |
| URI: | http://hdl.handle.net/1843/46597 |
| Data do documento: | 10-Jul-2020 |
| metadata.dc.url.externa: | https://ieeexplore.ieee.org/document/9138720 |
| metadata.dc.relation.ispartof: | IEEE Journal of Selected Topics in Quantum Electronics |
| Aparece nas coleções: | Artigo de Periódico |
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