25 August 2017 Polarization dependent second harmonic generations of equilateral triangular Au nanorods at localized surface plasmon resonances
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Abstract
The paper presents second harmonic generations (SHG) from Au nanoprisms at localized surface plasmon resonances. The model system was equilateral triangular nanoprisms that were arranged two-dimensionally in trigonal lattices. At lower excitation power regions, the SHG conversion efficiencies were almost independent of the excitation light polarization angles, while the polarization angles of the SHG waves were twice as much as those of the excitation light polarizations. The polarization dependencies were in a good agreement with the demands required from the C3v point symmetry of the systems. On the other hand, the SHG conversion efficiencies were dependent on the excitation light polarization angles at higher excitation power regions. The anisotropy in the nonlinear optical responses was explained from the viewpoint of the polarization-dependent depletions of the surface electrons on the metal surfaces.
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Atsushi Sugita, Atsushi Sugita, Hirofumi Yogo, Hirofumi Yogo, Atsushi Ono, Atsushi Ono, Yoshimasa Kawata, Yoshimasa Kawata, } "Polarization dependent second harmonic generations of equilateral triangular Au nanorods at localized surface plasmon resonances", Proc. SPIE 10346, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XV, 103462M (25 August 2017); doi: 10.1117/12.2273485; https://doi.org/10.1117/12.2273485
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