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URN:
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http://URN.fi/URN:NBN:fi:tty-201103311130
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Title:
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Multipole interference in the second-harmonic optical 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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2007 |
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DOI:
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http://dx.doi.org/10.1103/PhysRevLett.98.167403
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Description:
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http://link.aps.org/doi/10.1103/PhysRevLett.98.167403 |
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University:
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Tampereen teknillinen yliopisto |
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Department:
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Fysiikan laitos – Institute of Physics |
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Abstract:
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We provide experimental evidence of higher multipole (magnetic dipole and electric quadrupole) radiation in second-harmonic (SH) generation from arrays of metal nanoparticles. Fundamental differences in the radiative properties of electric dipoles and higher multipoles yield opposite interference effects observed in the SH intensities measured in the reflected and transmitted directions. These interference effects clearly depend on the polarization of the fundamental field, directly indicating the importance of multipole effects in the nonlinear response. We estimate that higher multipoles contribute up to 20% of the total emitted SH field amplitude for certain polarization configurations. |
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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. |