Applied Physics B

, 96:325

Near-field optical power transmission of dipole nano-antennas

Authors

    • Faculty of Engineering and Natural SciencesSabanci University
  • E. Baran
    • Faculty of Engineering and Natural SciencesSabanci University
Article

DOI: 10.1007/s00340-009-3505-0

Cite this article as:
Şendur, K. & Baran, E. Appl. Phys. B (2009) 96: 325. doi:10.1007/s00340-009-3505-0

Abstract

Nano-antennas in functional plasmonic applications require high near-field optical power transmission. In this study, a model is developed to compute the near-field optical power transmission in the vicinity of a nano-antenna. To increase the near-field optical power transmission from a nano-antenna, a tightly focused beam of light is utilized to illuminate a metallic nano-antenna. The modeling and simulation of these structures is performed using 3-D finite element method based full-wave solutions of Maxwell’s equations. Using the optical power transmission model, the interaction of a focused beam of light with plasmonic nano-antennas is investigated. In addition, the tightly focused beam of light is passed through a band-pass filter to identify the effect of various regions of the angular spectrum to the near-field radiation of a dipole nano-antenna. An extensive parametric study is performed to quantify the effects of various parameters on the transmission efficiency of dipole nano-antennas, including length, thickness, width, and the composition of the antenna, as well as the wavelength and half-beam angle of incident light. An optimal dipole nano-antenna geometry is identified based on the parameter studies in this work. In addition, the results of this study show the interaction of the optimized dipole nano-antenna with a magnetic recording medium when it is illuminated with a focused beam of light.

PACS

73.20.Mf 85.70.Sq 68.37.Uv 84.40.Ba 42.79.Vb

Copyright information

© Springer-Verlag 2009