Document Type : Original Article
Authors
Department of Physics, Faculty of Basic Sciences, University of Qom, Qom, Iran
Abstract
In this study, the excitation of localized surface plasmons in a shell and hollow circular nanodisk was theoretically simulated using the Finite Difference Time Domain (FDTD) method. The effects of shell and cavity sizes on the localized plasmonic modes were analyzed. The localized plasmonic modes were extracted from the extinction spectra, and their electric field distributions and charge densities were investigated as a function of structural parameters. The results indicated that by examining asymmetric nanoparticles, where the shell size differs on each side due to the varying location of the cavity, and by studying nanoparticles with multiple cavities, more diverse plasmonic modes could be achieved. The occurrence of such diverse modes in shell-and-hollow nanodisks could have broad applications in quantum photonics, plasmonic sensors, information processing, and photothermal therapy.
Keywords
Main Subjects
- M A García, Phys. D: Appl. Phys. 44, 28 (2011) 283001.
- P A Sohi and M Kahrizi, “Recent Advances in Nanophotonics-Fundamentals and Applications” IntechOpen, London, UK, (2020).
- F Babaei, M Javidnasab, and A Rezaei, Plasmonics 13 (2018) 1491.
- S A Maier, ‟Plasmonics: Fundamentals and Applications” New York: springer (2007).
- F Babaei and M Rostami, Commun. 439 (2019) 8.
- K Kosuda, J Bingham, et al., “Handbook of Nanoscale Optics and Electronics” Northwestern University, Evanston, IL, USA (2010).
- C Li and Y Jin, Funct. Mater. 31, 7 (2021) 2008031.
- D Sun, et al., ACS Nano 9, 6 (2015) 5657.
- A R Ferhan, et al., Nanoscale Adv. 2, 8 (2020) 3103.
- S Li, et al., ACS Nano 15, 7 (2021) 10759.
- R Yu, et al., Soc. Rev. 46, 22 (2017) 6710.
- M Zeng, et al., Nanoscale 16,10 (2024) 5232.
- C de la Encarnación, et al., Drug Deliv. Rev. 189 (2022) 114484.
- C Li and Y Jin, Funct. Mater. 31, 7 (2021) 2008031.
- E D Palik (Ed.), “Handbook of Optical Constants of Solids III”, Academic Press (1998).
- T Perera, et al., Phys. Chem. C 124, 50 (2020) 27694.
- Y W Ma, et al., Plasmonics 12 (2017) 1057.
- E Prodan, et al., Science 302, 5644 (2003) 419.
- A Genç, et al., Nanophotonics 6, 1 (2017) 193.
- S Lal, S Link and N J Halas, Photonics 1, 11 (2007) 641.
- W Feng, et al., Chem. 91, 4 (2019) 3002.
- E A Gurvitz, et al., Laser Photonics Rev. 13, 5 (2019) 1800266.
- C Radloff and N J Halas, Nano Lett. 4, 7 (2004) 1323.
- G Festa and S Nielsen, Seismol. Soc. Am. 93, 2 (2003) 891.
)