Modulation of Surface Plasmon due to the Inhomogeneity of a One-Dimensional Linear Array of Gold Nanoparticles Observed by Optical Second-Harmonic Generation Microscopy

In this study, optical second-harmonic generation (SHG) microscopy of one-dimensional linear arrays of spherical Au nanoparticles (NPs) at the submicron scale was performed. Nine spherical Au NPs with a particle size of ∼100 nm were arrayed one-dimensionally in a groove on a glass substrate, and the...

Full description

Saved in:
Bibliographic Details
Published inE-journal of surface science and nanotechnology Vol. 22; no. 2; pp. 162 - 169
Main Authors Miyauchi, Yoshihiro, Shimada, Toru, Hirata, Yasuyuki, Ohno, Shinya, Umemura, Yasushi
Format Journal Article
LanguageEnglish
Published Tokyo The Japan Society of Vacuum and Surface Science 25.01.2024
Japan Science and Technology Agency
Subjects
Antenna arrays
Atomic force microscopy
Atomic structure
Au nanoparticles
Electric fields
Electric filters
Energy distribution
Glass substrates
Gold
Grooves
Inhomogeneity
Linear array
Linear arrays
Microscopy
Nanoparticles
Optical second-harmonic generation
Plasmons
Second harmonic generation
Second-harmonic Rayleigh scattering
Spherical harmonics
Surface plasmon
Waveguides
Online AccessGet full text

Cover

More Information
Summary:In this study, optical second-harmonic generation (SHG) microscopy of one-dimensional linear arrays of spherical Au nanoparticles (NPs) at the submicron scale was performed. Nine spherical Au NPs with a particle size of ∼100 nm were arrayed one-dimensionally in a groove on a glass substrate, and the array structure was observed by atomic force microscopy (AFM). The second-harmonic (SH) intensity distribution in the linear array was non-uniform and varied with photon energy. To understand the relationship between the SH signal and the local electric field related to the surface plasmon (SP) modes on the array, we calculated the local electric field generated between NPs based on the array structure of the particles observed by AFM. The SH intensity distribution and its wavelength dependence could be qualitatively explained by the local electric field distribution reflecting the spatially separated SP modes due to array inhomogeneity. SHG microscopy can be used to understand the details of SP interactions that reflect the microstructure of linear arrays, which are applied to nanoscale waveguides, filters, and antennas.
ISSN:1348-0391
1348-0391
DOI:10.1380/ejssnt.2024-001