Hung, L. Lee, S. Y. McGovern, O. Rabin, O. Mayergoyz, I. 2024-01-20T11:34:45Z 2024-01-20T11:34:45Z 2021-08-31 2013-08-19 2469-9950 https://pubs.kist.re.kr/handle/201004/127767 The problem of plasmon resonances in metallic nanoparticles can be formulated as an eigenvalue 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 As the nanoparticle size increases, the quasistatic condition is no longer valid.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. English AMER PHYSICAL SOC METAL NANOPARTICLES OPTICAL-PROPERTIES AG NANOCUBES GOLD SCATTERING SHAPE EXCITATION DIMERS SIZE NM Calculation and measurement of radiation corrections for plasmon resonances in nanoparticles Article 10.1103/PhysRevB.88.075424 1 Physical Review B, v.88, no.7 Physical Review B 88 7 scie scopus 000323329500007 Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Materials Science Physics Article METAL NANOPARTICLES OPTICAL-PROPERTIES AG NANOCUBES GOLD SCATTERING SHAPE EXCITATION DIMERS SIZE NM silver nanocubes plasmon resonance