A4 Article in conference proceedings
Numerical study on the limit of quasi-static approximation for plasmonic nanosphere (2020)
Dutta, A., Tiainen, V., & Toppari, J. (2020). Numerical study on the limit of quasi-static approximation for plasmonic nanosphere. In M. S. Shekhawat, S. Bhardwaj, & B. Suthar (Eds.), ICC-2019 : 3rd International Conference on Condensed Matter and Applied Physics (Article 050012). American Institute of Physics. AIP Conference Proceedings, 2220. https://doi.org/10.1063/5.0001102
JYU authors or editors
Publication details
All authors or editors: Dutta, Arpan; Tiainen, Ville; Toppari, Jussi
Parent publication: ICC-2019 : 3rd International Conference on Condensed Matter and Applied Physics
Parent publication editors: Shekhawat, Manoj Singh; Bhardwaj, Sudhir; Suthar, Bhuvneshwer
Conference:
- International Conference on Condensed Matter and Applied Physics
Place and date of conference: Bikaner, India, 14.-15.10.2019
ISBN: 978-0-7354-1976-6
Journal or series: AIP Conference Proceedings
ISSN: 0094-243X
eISSN: 1935-0465
Publication year: 2020
Number in series: 2220
Article number: 050012
Publisher: American Institute of Physics
Publication country: United States
Publication language: English
DOI: https://doi.org/10.1063/5.0001102
Publication open access: Not open
Publication channel open access:
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/68861
Abstract
Plasmonic nanospheres are often employed as resonant substrates in many nanophotonic applications, like in enhanced spectroscopy, near-field microscopy, photovoltaics, and sensing. Accurate calculation and tuning of optical responses of such nanospheres are essential to achieve optimal performance. Mie theory is widely used to calculate optical properties of spherical particles. Although, an approximated version of Mie approach, the quasi-static approximation (QSA) can also be used to determine the very same properties of those spheres with a lot simpler formulations. In this work, we report our numerical study on the limit and accuracy of QSA with respect to the rigorous Mie approach. We calculated scattering, absorption and extinction spectra of silver and gold nanospheres in air with varying sizes using both QSA and Mie theory. Then, we extracted spectral positions of the resonance peaks from their calculated optical responses and defined the error present in QSA as the difference between the spectral positions of the resonance peaks calculated by QSA and Mie method. Our error analysis reveals that QSA approach yields nonlinear increment in error with linear increment in size of the nanosphere and that the amount of error is significantly less in the case of gold spheres compared to the silver ones. We also provide a polynomial-fitted error function that resembles the qualitative trend in error.
Keywords: condensed matter physics; plasmons; nanoparticles; optical properties
Free keywords: condensed matter physics
Contributing organizations
Ministry reporting: Yes
Reporting Year: 2020
JUFO rating: 1