Surface enhanced infrared spectroscopy with gold strip gratings.
Opt Express
; 21(7): 9005-10, 2013 Apr 08.
Article
em En
| MEDLINE
| ID: mdl-23571990
ABSTRACT
We investigate surface enhanced infrared absorption (SEIRA) spectroscopy with gold strip gratings made by standard optical lithography. By exciting surface plasmon polaritons on both air-gold and gold-substrate interfaces, the resonance of the 1D gratings is linearly tunable with the grating period. With the field enhancement at the edge of the gold strips, a SEIRA enhancement factor more than 6000 for PMMA molecules is achieved. The strong SEIRA enhancement together with the easy fabrication makes the gold strip grating a promising candidate for SEIRA experiments.
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Base de dados:
MEDLINE
Assunto principal:
Refratometria
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Espectrofotometria Infravermelho
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Ressonância de Plasmônio de Superfície
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Ouro
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article