ECE News Story
Mayergoyz Published in Physical Review B on Plasmon Resonances in Nanoparticles
A paper co-authored by ECE Alford L. Ward Professor Issak Mayergoyz, L. Hung, O. Rabin, S.Y. Lee and O. McGovern titled, “Calculation and Measurement of Radiation Corrections for Plasmon Resonances in Nanoparticles” was accepted as a regular article in Physical Review B on August 1.
The publication’s abstract is as follows:
The problem of plasmon resonances in metallic nanoparticles can be formulated as an eigen-value problem under the condition that the wavelengths of the incident radiation are much larger than the particle dimensions. As the nanoparticle size increases, the quasistatic condition is no longer valid. For this reason, the accuracy of the electrostatic approximation may be compromised and appropriate radiation corrections for the calculation of resonance permittivities and resonance wavelengths are needed. In this paper, we present the radiation corrections in the framework of the eigenvalue method for plasmon mode analysis and demonstrate that the computational results accurately match analytical solutions (for nanospheres) and experimental data (for nanorings and nanocubes). We also demonstrate that the optical spectra of silver nanocube suspensions can be fully assigned to dipole-type resonance modes when radiation corrections are introduced. Finally, our method is used to predict the resonance wavelengths for face-to-face silver nanocube dimers on glass substrates. These results may be useful for the indirect measurements of the gaps in the dimers from extinction cross-section observations.
Physical Review B is the largest and most comprehensive international journal specializing in condensed matter and materials physics, publishing important papers on a wide range of topics. The journal has an impact factor of 3.767 (2012) and is ranked number one in total citations in condensed matter physics.
August 21, 2013