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Dispersion of polarization coupling, localized and collective plasmon modes in a metallic photonic crystal mapped by Mueller Matrix Ellipsometry

Kildemo, Morten; Brakstad, Thomas; Ghadyani, Zahra; Simonsen, Ingve
Journal article, Peer reviewed
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URI
http://hdl.handle.net/11250/2389440
Date
2015
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  • Publikasjoner fra CRIStin - NTNU [26736]
Original version
Optics Express 2015, 23(17): 22800-22815   10.1364/OE.23.022800
Abstract
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.
Publisher
Optical Society of America
Journal
Optics Express

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