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 editorsDutta, Arpan; Tiainen, Ville; Toppari, Jussi

Parent publicationICC-2019 : 3rd International Conference on Condensed Matter and Applied Physics

Parent publication editorsShekhawat, Manoj Singh; Bhardwaj, Sudhir; Suthar, Bhuvneshwer

Conference:

  • International Conference on Condensed Matter and Applied Physics

Place and date of conferenceBikaner, India14.-15.10.2019

ISBN978-0-7354-1976-6

Journal or seriesAIP Conference Proceedings

ISSN0094-243X

eISSN1935-0465

Publication year2020

Number in series2220

Article number050012

PublisherAmerican Institute of Physics

Publication countryUnited States

Publication languageEnglish

DOIhttps://doi.org/10.1063/5.0001102

Publication open accessNot 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.


Keywordscondensed matter physicsplasmonsnanoparticlesoptical properties

Free keywordscondensed matter physics


Contributing organizations


Ministry reportingYes

Reporting Year2020

JUFO rating1


Last updated on 2024-26-03 at 09:18