https://doi.org/10.1051/epjap/2009123
Surface plasmon polaritons in sub-wavelength metallic gratings studied by higher-order angle-resolved spectroscopy
Institut Néel, CNRS and Université Joseph Fourier, BP 166, 38042 Grenoble, France
Corresponding author: jochen.fick@grenoble.cnrs.fr
Received:
19
March
2009
Revised:
23
April
2009
Accepted:
30
April
2009
Published online:
21
July
2009
Angle-resolved reflection spectroscopy is used to study surface plasmon polariton modes of metallic gratings consisting of sub-wavelength grooves. The used optical set-up allows recording of zero and m = −1 order reflection spectra in the visible and near infra-red spectral region. The different modes and their mutual coupling was identified in the dispersion diagram by means of modal theory. Surface plasmon modes at the grating surface and cavity modes in the sub-wavelength grooves were evidenced.
PACS: 42.25.Fx – Diffraction and scattering / 78.67.-n – Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures / 42.79.Dj – Gratings
© EDP Sciences, 2009
