Dispersion of polarization coupling, localized and collective plasmon modes in a metallic photonic crystal mapped by Mueller Matrix Ellipsometry
Journal article, Peer reviewed
Permanent lenke
http://hdl.handle.net/11250/2389440Utgivelsesdato
2015Metadata
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Sammendrag
We report a spectroscopic Mueller matrix experimental study
of a plasmonic photonic crystal consisting of gold hemispheroidal particles
(lateral radius 54 nm, height 25 nm) arranged on a square lattice (lattice
constant 210 nm) and supported by a glass substrate. Strong polarization
coupling is observed for ultraviolet wavelengths and around the surface
plasmon resonance for which the off-block-diagonal Mueller matrix
elements show pronounced anisotropies. Due to the Rayleigh anomalies,
the block-diagonal Mueller matrix elements produce a direct image of the
Brillouin Zone (BZ) boundaries of the lattice and resonances are observed
at the M-point in the first and at the X-point in the second BZ. These elements
show also the dispersion of the localized surface plasmon resonance.