Effects of defocusing on near-field intensity enhancement

Sarita .; Rajan Jha; Rakesh Kumar Singh

doi:10.1117/12.3028133

2 October 2024 Effects of defocusing on near-field intensity enhancement

Sarita ., Rajan Jha, Rakesh Kumar Singh

Proceedings Volume 13111, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXII; 131110C (2024) https://doi.org/10.1117/12.3028133
Event: Nanoscience + Engineering, 2024, San Diego, California, United States

Conference Poster

Abstract

Defocusing in an optical system is a common practical issue that affects the quality and shape of the beam and is hence important in the light-matter interaction. A detailed investigation is carried out on the interaction of the tightly focused beam with a spherical nanoparticle under defocusing. Tightly focused beams with linear and radial polarization are considered for the investigation and the influence of such beams on plasmonic characteristics of a nanoparticle is analyzed. The effect of defocusing is observed on intensity enhancement in near-field in different surrounding media.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Sarita ., Rajan Jha, and Rakesh Kumar Singh "Effects of defocusing on near-field intensity enhancement", Proc. SPIE 13111, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXII, 131110C (2 October 2024); https://doi.org/10.1117/12.3028133

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