Understanding the dispersion of coaxial plasmonic structures through a connection with the planar metal-insulator-metal geometry
Appl. Phys. Lett. 94, 231111 (2009); doi:10.1063/1.3148692
Published 9 June 2009
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We elucidate the dispersion behavior of deep-subwavelength propagating modes in coaxial plasmonic structures by making an explicit connection with the planar metal-insulator-metal geometry. We provide an intuitive picture that allows for a qualitative understanding and a quantitative prediction of the entire dispersion behavior, which includes the number of modes at every frequency, the modal propagation constants, the propagation losses, and the cutoff frequencies of propagating modes supported by these technologically important structures. We validate our analytical approach by comparing its predictions to first-principles finite-difference frequency-domain simulations.
©2009 American Institute of Physics
| History: | Received 3 March 2009; accepted 13 May 2009; published 9 June 2009 |
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http://link.aip.org/link/?APPLAB/94/231111/1 |
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