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URN:
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http://URN.fi/URN:NBN:fi:tty-201103311069
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Title:
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Multipolar analysis of second-harmonic radiation from gold nanoparticles |
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Author:
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Kujala, Sami; Canfield, Brian K.; Kauranen, Martti; Svirko, Yuri; Turunen, Jari |
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Publication type:
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Artikkeli - Article |
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Issue date:
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2008 |
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DOI:
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http://dx.doi.org/10.1364/OE.16.017196
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Description:
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This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-22-17196. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. |
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University:
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Tampereen teknillinen yliopisto - Tampere University of Technology |
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Faculty:
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Luonnontieteiden ja ympäristötekniikan tiedekunta – Faculty of Science and Environmental Engineering |
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Department:
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Fysiikan laitos – Department of Physics |
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Abstract:
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We present a multipolar tensor analysis of second-harmonic radiation from arrays of noncentrosymmetric L-shaped gold nanoparticles. Our approach is based on the fundamental differences in the radiative properties of electric dipoles and higher multipoles, which give rise to differences in the nonlinear response tensors for the reflected and transmitted second-harmonic signals. The results are analyzed by dividing the tensors into symmetric (dipolar) and antisymmetric (higher multipolar) parts between the two directions. The nonlinear response is found to be dominated by a tensor component, not resolved earlier [Phys. Rev. Lett. 98, 167403 (2007)], which is associated with chiral symmetry breaking of the sample and which also contains a strong multipolar contribution. The results are explained by a phenomenological model where asymmetrically-distributed defects on opposite sides of the particles give rise to dipolar and quadrupolar second-harmonic emission. |
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Copyright:
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This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited. |