Enhanced surface-plasmon resonance absorption in metal-dielectric-metal layered microspheres

Optics Letters
Keisuke HasegawaMiriam Deutsch

Abstract

We present a theoretical study of the dispersion relation of surface-plasmon resonances of mesoscopic metal-dielectric-metal microspheres. By analyzing the solutions to Maxwell's equations, we obtain a simple geometric condition for which the system exhibits a band of surface-plasmon modes whose resonant frequencies are weakly dependent on the multipole number. Using a modified Mie calculation, we find that a large number of modes belonging to this flat-dispersion band can be excited simultaneously by a plane wave, thus enhancing the absorption cross section. We demonstrate that the enhanced absorption peak of the sphere is geometrically tunable over the entire visible range.

References

Dec 20, 2003·Physical Review Letters·Kuiru LiDavid J Bergman
Apr 7, 2004·Applied Optics·Hong Du
Feb 9, 2005·Physical Review Letters·P J SchuckW E Moerner
Jun 11, 2005·Science·P MühlschlegelD W Pohl
Oct 15, 1981·Applied Optics·O B Toon, T P Ackerman

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Citations

Jul 16, 2015·Scientific Reports·Wei LiuYuri S Kivshar
Jun 30, 2011·Nanoscale Research Letters·Ovidio Peña-Rodríguez, Umapada Pal
Mar 21, 2008·Physical Review Letters·Justin Elser, Viktor A Podolskiy
Mar 16, 2007·Optics Letters·Charles RohdeMiriam Deutsch
Sep 11, 2019·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Ilia L RasskazovP Scott Carney

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