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Analysis of the phonon-polariton response of silicon carbide microparticles and nanoparticles by use of the boundary element method
Auteur(s)
Rockstuhl, Carsten
Salt, Martin Guy
Herzig, Hans-Peter
Date de parution
2005
In
Journal of the Optical Society of America B, Optical Society of America, 2005/22/2/481-487
Mots-clés
Résumé
We investigate the small-particle phonon-polariton response of several microstructures that are made of silicon carbide (SiC). Phonon polaritons can be excited in a wavelength region between 10 and 12 µm. Simple structures such as elliptical cylinders support phonon polaritons at two wavelengths, which depend on the axis ratio of the particle. In particles with a more irregular shape such as rectangular or triangular cylinders, up to five phonon polaritons can be excited. Through comparison of the strength of phonon-polariton excitation with the similar effect of the plasmon-polariton excitation in metallic nanoparticles, it is found that the excitation of phonon polaritons is more efficient. This behavior is attributed to the lower imaginary part of the dielectric constant of SiC.
Identifiants
Autre version
http://josab.osa.org/abstract.cfm?id=82455
Type de publication
journal article
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