OPTICAL FIELD ENHANCEMENT WITH PLASMON RESONANT BOWTIE NANOANTENNAS

  • G.S. KINO
  • ARVIND SUNDARAMURTHY
  • P.J. SCHUCK
  • D.P. FROMM
  • W.E. MOERNER
Part of the Springer Series in Optical Sciences book series (SSOS, volume 131)

Abstract

When light of wavelength λ is focused into a medium of refractive index n, the minimum spot size due to diffraction is on the order of λ/(2n). For example, at a wavelength of 405 nm, at the edge of the visible band, diffraction limits the minimum spot size to be greater than 100 nm. Near-field techniques based on the idea that light can be passed through a tapered metal-covered optical fiber, which acts as a cut-off waveguidewhen the guide diameter is less than λ/(2n), have made it possible to obtain spot sizes on the order of 50 nm with power transmission on the order of 10−3 to 10−6 of the incident power. Similarly, passing light through a small pinhole on the order of 50 nm diameter leads to a field intensity at the end of the guide which is greatly reduced from that of the incident field.

Keywords

Acetone Chrome Isopropyl Alcohol PMMA Sapphire 

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Copyright information

© Springer 2007

Authors and Affiliations

  • G.S. KINO
    • 1
  • ARVIND SUNDARAMURTHY
    • 1
  • P.J. SCHUCK
    • 1
  • D.P. FROMM
    • 1
  • W.E. MOERNER
    • 1
  1. 1.Stanford UniversityStanfordUSA

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