Propagation properties of surface plasmon along metal nano-aperture and nano-wire

HongXing Yuan; B. X. Xu; T. C. Chong

doi:10.1117/12.685180

22 June 2006 Propagation properties of surface plasmon along metal nano-aperture and nano-wire

HongXing Yuan, B. X. Xu, T. C. Chong

Proceedings Volume 6282, Optical Data Storage 2006; 62821R (2006) https://doi.org/10.1117/12.685180
Event: Optical Data Storage 2006, 2006, Montréal, Canada

Abstract

Surface plasmon propagation properties for nano-sized metal aperture and nano-wire structures are studied based on the waveguide theory. It is verified that there are only TM₀ and HE₁ mode existing in both structures. For nano-wire structure, however, there is no cut-off radii for both TM₀ and HE₁ mode. On the contrast, there is a cut-off radius for nano-sized silver aperture structure, and even more, there are several characteristic radius coefficients a/ λ, -0.32, 0.73. For each section, the EM wave may takes on different features, e.g., totally-bounded features along the aperture interface for a/ λ >0.73, or oscillation inside core or strong attenuation along z direction for 0.32<a/ λ<0.73). HE₁ mode of metal aperture doesn't show cut-off radius as well, but the wave-number along z direction monotonically increase with the radius coefficient a/ λ in contrast with existence of a characteristic radius coefficient a/ λ of 0.41 for nano-wire.

Citation Download Citation

HongXing Yuan, B. X. Xu, and T. C. Chong "Propagation properties of surface plasmon along metal nano-aperture and nano-wire", Proc. SPIE 6282, Optical Data Storage 2006, 62821R (22 June 2006); https://doi.org/10.1117/12.685180

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