Direct imaging of localized surface plasmon polaritons
Author
Balcı, Sinan
Karademir, Ertuğrul
Kocabaş, Coşkun
Aydınlı, Atilla
Date
2011-08Source Title
Optics Letters
Print ISSN
0146-9592
Publisher
Optical Society of America
Volume
36
Issue
17
Pages
3401 - 3403
Language
English
Type
ArticleItem Usage Stats
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Abstract
In this Letter, we report on dark field imaging of localized surface plasmon polaritons (SPPs) in plasmonic waveguiding bands formed by plasmonic coupled cavities. We image the light scattered from SPPs in the plasmonic cavities excited by a tunable light source. Tuning the excitation wavelength, we measure the localization and dispersion of the plasmonic cavity mode. Dark field imaging has been achieved in the Kretschmann configuration using a supercontinuum white-light laser equipped with an acoustooptic tunable filter. Polarization dependent spectroscopic reflection and dark field imaging measurements are correlated and found to be in agreement with finite-difference time-domain calculations.
Keywords
Acousto-optic tunable filtersCavity mode
Coupled cavity
Dark field imaging
Direct imaging
Excitation wavelength
Finite difference time domains
Kretschmann configuration
Localized surface plasmon polaritons
Plasmonic
Supercontinuum
Wave-guiding
White-light laser
Electromagnetic wave polarization
Finite difference time domain method
Quantum theory
Solids
Time domain analysis
Plasmons