Theory of plasmonic nanorod resonances

Aftab Ahmed; Reuven Gordon

doi:10.1117/12.872914

22 September 2010 Theory of plasmonic nanorod resonances

Aftab Ahmed, Reuven Gordon

Proceedings Volume 7750, Photonics North 2010; 77502D (2010) https://doi.org/10.1117/12.872914
Event: Photonics North 2010, 2010, Niagara Falls, Canada

Abstract

Surface waves on cylindrical rods with dimensions much smaller than the incident radiation experience reflection from the ends of the rods thus effectively forming a cavity. Rods with flat ends and rounded ends have been studied in the past for determination of the phase of reflection, which plays a vital role in determining the resonant frequency. In this paper we present a simpler approach to evaluate the phase of reflection from rounded end rods by considering the limiting case of a sphere. We approximate the extreme sub-wavelength sphere by a Fabry Perot (FP) resonator to derive the relation for phase of reflection which will prove useful for the design of nanorods for various applications. Optical nanorods are extensively utilized in optical antennas, optical/biological sensors, light emitting devices and other optoelectronic devices.

Citation Download Citation

Aftab Ahmed and Reuven Gordon "Theory of plasmonic nanorod resonances", Proc. SPIE 7750, Photonics North 2010, 77502D (22 September 2010); https://doi.org/10.1117/12.872914

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KEYWORDS

Reflection

Optical spheres

Nanorods

Resonators

Plasmonics

Finite-difference time-domain method

Optoelectronic devices

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