A4 Article in conference proceedings
Numerical study on the limit of quasi-static approximation for plasmonic nanosphere (2020)


Dutta, Arpan; Tiainen, Ville; Toppari, Jussi (2020). Numerical study on the limit of quasi-static approximation for plasmonic nanosphere. In Shekhawat, Manoj Singh; Bhardwaj, Sudhir; Suthar, Bhuvneshwer (Eds.) ICC-2019 : 3rd International Conference on Condensed Matter and Applied Physics, AIP Conference Proceedings, 2220. American Institute of Physics, 050012. DOI: 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: http://doi.org/10.1063/5.0001102

Open Access: Publication channel is not openly available

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

Preliminary JUFO rating: 1


Last updated on 2020-18-08 at 13:36