Theory of plasmonic nanorod resonances

Aftab Ahmed, Reuven Gordon

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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.

Original languageEnglish (US)
Title of host publicationPhotonics North 2010
StatePublished - 2010
Externally publishedYes
EventPhotonics North 2010 - Niagara Falls, ON, Canada
Duration: Jun 1 2010Jun 3 2010

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferencePhotonics North 2010
CityNiagara Falls, ON


  • FP resonators
  • Resonators
  • Sensors
  • Subwavelength structures
  • Surface Plasmons
  • Waveguides


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