Electrostatic plasmon resonances of metal nanoparticles in stratified geometries

Jesper Jung; Thomas G. Pedersen; Thomas Søndergaard; Kjeld Pedersen

doi:10.1117/12.859831

10 September 2010 Electrostatic plasmon resonances of metal nanoparticles in stratified geometries

Jesper Jung, Thomas G. Pedersen, Thomas Søndergaard, Kjeld Pedersen

Proceedings Volume 7757, Plasmonics: Metallic Nanostructures and Their Optical Properties VIII; 77572C (2010) https://doi.org/10.1117/12.859831
Event: SPIE NanoScience + Engineering, 2010, San Diego, California, United States

Abstract

A theoretical electrostatic approach for determination of plasmon eigenresonances and absorption cross section spectra of arbitrarily shaped metal nanoparticles with cylindrical symmetry in stratified geometries is presented. The method is based on a surface integral equation for the surface polarization charge density. From symmetry considerations and by incorporating all effects of the stratified surrounding into the Green's function we show how the three dimensional analysis can be reduced to a single integral over the polar angle along the surface of the metal nanoparticle. The theoretical scheme is exemplified by analyzing silver nanoparticles shaped as spheres, oblate spheroids, and nanodisks in different surroundings involving silicon. The effect of varying the distance between a silver sphere and a silicon surface on plasmonic eigenvalues and absorption cross section spectra is presented. By flattening silver oblate spheroids and nanodisks embedded in a homogenous silicon surrounding it is shown how the fundamental horizontally polarized plasmon resonance can be shifted into the near infrared wavelength range. Also the effect of varying the thickness of thin silicon films with silver nanoparticles embedded is presented. The results indicate that silver nanoparticles embedded in silicon could be interesting for plasmon assisted solar cells.

Citation Download Citation

Jesper Jung, Thomas G. Pedersen, Thomas Søndergaard, and Kjeld Pedersen "Electrostatic plasmon resonances of metal nanoparticles in stratified geometries", Proc. SPIE 7757, Plasmonics: Metallic Nanostructures and Their Optical Properties VIII, 77572C (10 September 2010); https://doi.org/10.1117/12.859831

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