SHG behaviors due to coupled plasmon modes in noncentro-symmetrically arranged Au nanorod trimer structure

Atsushi Sugita; Shunnma Oh; Yohsei Nakatsuka

doi:10.1117/12.2594074

1 August 2021 SHG behaviors due to coupled plasmon modes in noncentro-symmetrically arranged Au nanorod trimer structure

Atsushi Sugita, Shunnma Oh, Yohsei Nakatsuka

Author Affiliations +

Proceedings Volume 11795, Metamaterials, Metadevices, and Metasystems 2021; 117952B (2021) https://doi.org/10.1117/12.2594074
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Conference Poster

Abstract

The paper reports the second harmonic generation (SHG) behaviors of dolmen-type Au nanorod (AuNR) trimer structure, in which two of the AuNR’s are arrayed in parallel and the third is arrayed perpendicular to them. Our experimental results demonstrated that the SHG signal from the trimer was 25 times higher than that from the referential isolated AuNR monomer and dimer. The geometry of the AuNR was centro-symmetric, and it was forbidden in the second-order nonlinear susceptibility under the electric dipole approximations. The coupled plasmon mode in noncentrosymmetrically arranged trimer provided the nanometric optical fields suitable for the 2nd-order nonlinear optics.

Conference Presentation

Citation Download Citation

Atsushi Sugita, Shunnma Oh, and Yohsei Nakatsuka "SHG behaviors due to coupled plasmon modes in noncentro-symmetrically arranged Au nanorod trimer structure", Proc. SPIE 11795, Metamaterials, Metadevices, and Metasystems 2021, 117952B (1 August 2021); https://doi.org/10.1117/12.2594074

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