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URN:
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http://URN.fi/URN:NBN:fi:tty-2011111514880
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Title:
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Nonlinear chiral imaging of subwavelength-sized twisted-cross gold nanodimers |
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Author:
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Huttunen, Mikko; Bautista, Godofredo; Decker, Manuel; Linden, Stefan; Wegener, Martin; Kauranen, Martti |
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Publication type:
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Artikkeli - Article |
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Issue date:
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2011 |
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DOI:
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http://dx.doi.org/10.1364/OME.1.000046
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Description:
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Copyright 2011 The Optical Society |
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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 perform second-harmonic generation (SHG) microscopy with circularly polarized (CP) light to measure chirality of individual twisted-cross gold nanodimers. The chiral signatures, based on different SHG response for the two CP components of incident light, are clearly visible even with off-resonance excitation. The SHG responses of individual nanodimers are found to vary by about a factor of five. The technique thus has very high sensitivity to the nanoscale deformations of the structure. The chiral signatures of the dimers, however, are found to be more uniform, and the technique is thus able to recognize the handedness of the twisted nanodimers with high reliability. |
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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. |