Optically deep asymmetric one-dimensional plasmonic crystal slabs: Genetic algorithm approach
JOSA B, Vol. 26, Issue 5, pp. 1111-1118 (2009)
http://dx.doi.org/10.1364/JOSAB.26.001111
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Abstract
Optical asymmetry with regard to transmission has been numerically explored in one-dimensional (1D) plasmonic crystal slabs (PlCSs) with the help of a genetic algorithm (GA). Optically deep asymmetric PlCSs are not obtained in one-layer systems and can be achieved in unit cell structures composed of more than two layers. The optical asymmetry is classified into two types. One is ascribed to anisotropic diffraction efficiency, and the other comes from collective oscillations of particle plasmons in each metallic nanorod and can induce nearly perfect absorption over a broad band. In both asymmetry types, the degree of freedom in depth is crucial to manipulate the linear optical responses of PlCSs. On the basis of the GA search, a simple design for optically asymmetric 1D PlCS is extracted, which provides a standard for broadband plasmonic absorbers in both photon energy and incident angles.
© 2009 Optical Society of America
OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(220.0220) Optical design and fabrication : Optical design and fabrication
(300.1030) Spectroscopy : Absorption
(050.5298) Diffraction and gratings : Photonic crystals
ToC Category:
Optical Design and Fabrication
History
Original Manuscript: November 19, 2008
Manuscript Accepted: March 20, 2009
Published: April 27, 2009
Citation
Masanobu Iwanaga, "Optically deep asymmetric one-dimensional plasmonic crystal slabs: Genetic algorithm approach," J. Opt. Soc. Am. B 26, 1111-1118 (2009)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-26-5-1111
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