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Broadband converging plasmon resonance at a conical nanotip

Wang, Yunshan and Plouraboué, Franck and Chang, Hsueh-Chia Broadband converging plasmon resonance at a conical nanotip. (2013) Optics Express, 21 (5). 6609-6617. ISSN 1094-4087

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Official URL: http://dx.doi.org/10.1364/OE.21.006609


We propose an analytical theory which predicts that Converging Plasmon Resonance (CPR) at conical nanotips exhibits a red-shifted and continuous band of resonant frequencies and suggests potential application of conical nanotips in various fields, such as plasmonic solar cells, photothermal therapy, tip-enhanced Raman and other spectroscopies. The CPR modes exhibit superior confinement and ten times broader scattering bandwidth over the entire solar spectrum than smooth nano-structures. The theory also explicitly connects the optimal angles and resonant optical frequencies to the material permittivities, with a specific optimum half angle that depends only on the real permittivity for high-permittivity and low-loss materials.

Item Type:Article
Additional Information:Thanks to Optical Society of America. The original publication is available at http://www.opticsinfobase.org/
HAL Id:hal-00824640
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > University of Notre Dame - ND (USA)
Laboratory name:
Deposited On:22 May 2013 09:01

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