Optical response of gold hemispheroidal lattices on transparent substrates - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Applied Surface Science Année : 2017

Optical response of gold hemispheroidal lattices on transparent substrates

Résumé

tSquare arrays of gold (Au) hemispheroids deposited on a UV-transparent glass substrate reveal a richoptical response when investigated by spectroscopic Mueller Matrix Ellipsometry. Two samples werestudied; the first consisted of hemispheroids of parallel radius of 58 nm and height 30 nm with lat-tice constant 210 nm; the corresponding parameters for the second sample were 38 nm, 20 nm and125 nm, respectively. By a full azimuthal rotation of the samples, we observe all the Rayleigh anoma-lies corresponding to grazing diffracted waves, with strong resonances for co-polarization scattered lightnear the high symmetry points and cross-polarization scattered light around the Localized Surface Plas-mon Resonance. Polarization-conversion becomes particularly important at grazing incidence, and thecross-polarization follows the Rayleigh lines. The optical response (neglecting polarization conversion) ismodelled in the quasi-static approximation using the so-called Bedeaux-Vlieger formalism, and the FiniteElement Method using COMSOL....
Fichier non déposé

Dates et versions

hal-01579708 , version 1 (31-08-2017)

Identifiants

Citer

Morten Kildemo, Jean-Philippe Banon, Alexandre Baron, Brage B. Svendsen, Thomas Brakstad, et al.. Optical response of gold hemispheroidal lattices on transparent substrates. Applied Surface Science, 2017, 421, pp. 593-600. ⟨10.1016/j.apsusc.2017.02.008⟩. ⟨hal-01579708⟩
43 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More