Second-harmonic generation imaging of metal nano-objects with cylindrical vector beams |
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Authors: | Bautista Godofredo Huttunen Mikko J Mäkitalo Jouni Kontio Juha M Simonen Janne Kauranen Martti |
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Affiliation: | Department of Physics, Tampere University of Technology, Tampere, Finland. godofredo.bautista@tut.fi |
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Abstract: | We introduce an imaging technique based on second-harmonic generation with cylindrical vector beams that is extremely sensitive to three-dimensional orientation and nanoscale morphology of metal nano-objects. Our experiments and second-harmonic field calculations based on frequency-domain boundary element method are in very good agreement. The technique provides contrast for structural features that cannot be resolved by linear techniques or conventional states of polarization and shows great potential for simple and cost-effective far-field optical imaging in plasmonics. |
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