We show that randomization of a nanodisk array on a rectangular lattice can be used to spectrally tune the surface-enhanced Raman scattering (SERS) intensity and to control the field enhancement. The spectral selectivity of the Raman modes exhibits a nonlinear dependence on the extinction. Randomization of the rectangular pattern brings a favorable increase of SERS intensity via a reduced selectivity and extinction changes at the Stokes band. The extinction dependence for two polarizations on the spacing in the rectangular array is demonstrated. For a given polarizations on the extinction strength depends primarily on the spacing between the nanodisks in the orthogonal direction. Such randomization and polarization control of SERS increases the versatility, e.g., all-optical control, of this important sensing tool.

Tunable Raman Selectivity via Randomization of a Rectangular Pattern of Nanodisks / Nishijima, Yoshiaki; Khurgin Jacob, B.; Rosa, Lorenzo; Fujiwara, Hideki; Juodkazis, Saulius. - In: ACS PHOTONICS. - ISSN 2330-4022. - 1:10(2014), pp. 1006-1012. [10.1021/ph500228s]

Tunable Raman Selectivity via Randomization of a Rectangular Pattern of Nanodisks

ROSA, Lorenzo;
2014

Abstract

We show that randomization of a nanodisk array on a rectangular lattice can be used to spectrally tune the surface-enhanced Raman scattering (SERS) intensity and to control the field enhancement. The spectral selectivity of the Raman modes exhibits a nonlinear dependence on the extinction. Randomization of the rectangular pattern brings a favorable increase of SERS intensity via a reduced selectivity and extinction changes at the Stokes band. The extinction dependence for two polarizations on the spacing in the rectangular array is demonstrated. For a given polarizations on the extinction strength depends primarily on the spacing between the nanodisks in the orthogonal direction. Such randomization and polarization control of SERS increases the versatility, e.g., all-optical control, of this important sensing tool.
2014
1
10
1006
1012
Tunable Raman Selectivity via Randomization of a Rectangular Pattern of Nanodisks / Nishijima, Yoshiaki; Khurgin Jacob, B.; Rosa, Lorenzo; Fujiwara, Hideki; Juodkazis, Saulius. - In: ACS PHOTONICS. - ISSN 2330-4022. - 1:10(2014), pp. 1006-1012. [10.1021/ph500228s]
Nishijima, Yoshiaki; Khurgin Jacob, B.; Rosa, Lorenzo; Fujiwara, Hideki; Juodkazis, Saulius
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1138515
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