Abstract

An end-to-end ovoid metallic nanoparticle pair is introduced, and its resonant wavelength can be determined by the particle geometry, particle separation, outside medium, and metallic material. The resonant peak shifts as a function of particle separation under different adjacent ends’ aspect ratios obey a universal scale after a normalization process. The scaled peak shifts are exponentially fitted, and the two fitting coefficients are obtained separately for the nanoparticle pair made of silver, gold, and aluminum immersed in several media. Equations are found in which the fitting coefficients can be derived from the medium and metallic refractive index. These equations are used to predict the resonant wavelength of the nanoparticle pair made of gallium in various media.

© 2012 Optical Society of America

Radiative damping of surface plasmon resonance in spheroidal metallic nanoparticle embedded in a dielectric medium

Nicolas I. Grigorchuk
J. Opt. Soc. Am. B 29(12) 3404-3411 (2012)

Noble-metal nanoparticles and short pulses for nanomanipulations: theoretical analysis

Gili Bisker and Dvir Yelin
J. Opt. Soc. Am. B 29(6) 1383-1393 (2012)

Surface enhanced absorption and transmission from dye coated gold nanoparticles in thin films

Virendra N. Rai, Arvind K. Srivastava, Chandrachud Mukherjee, and Sudip K. Deb
Appl. Opt. 51(14) 2606-2615 (2012)

Direct near-field optical imaging of plasmonic resonances in metal nanoparticle pairs

Hsing-Ying Lin, Chen-Han Huang, Chih-Han Chang, Yun-Chiang Lan, and Hsiang-Chen Chui
Opt. Express 18(1) 165-172 (2010)

Polarization switching between parallel and orthogonal collective resonances in arrays of metal nanoparticles

Alina Muravitskaya, Artur Movsesyan, Sergei Kostcheev, and Pierre-Michel Adam
J. Opt. Soc. Am. B 36(7) E65-E70 (2019)