Enhanced transmission and beam confinement using bullseye plasmonic lenses at THz frequencies

Download
  1. Get@NRC: Enhanced transmission and beam confinement using bullseye plasmonic lenses at THz frequencies (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1117/12.2040335
AuthorSearch for: ; Search for: ; Search for: ; Search for:
TypeArticle
Proceedings titleTerahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII
Series titleProceedings of SPIE; no. Vol. 8985
ConferenceNew Developments in THz, RF, Millimeter-Waves, and Sub-Millimeter Waves III, February 1 2014, San Fransisco, CA
ISSN0277-786X
Pages89851G-189851G-11
SubjectPlasmonics; bullseye lens; terahertz; micromilling; subwavelength imaging; surface plasmons
AbstractA major limitation in terahertz (THz) imaging applications is the relatively poor diffraction limited spatial resolution. A common approach to achieve subwavelength resolution is near-field imaging using a subwavelength aperture, but the low transmission efficiency through the aperture limits the sensitivity of this method. Bullseye structures, consisting of a single subwavelength circular aperture surrounded by concentric periodic corrugations, have been shown to enhance transmission through subwavelength apertures. At optical wavelengths, the fabrication of bullseye structures has been traditionally achieved by lithographic or chemical processes. Since the scale of plasmonic structures depends on the incident wavelength, precision micromilling techniques are well suited for THz applications. In this paper we describe a diamond micromilling process for the fabrication a plasmonic lenses operating at 325 GHz. Theoretical simulations are obtained using an FDTD solver and the performance of the lens is measured using a customized THz test bed.
Publication date
PublisherSociety of Photo-Optical Instrumentation Engingeers
LanguageEnglish
AffiliationAutomotive and Surface Transportation; National Research Council Canada
Peer reviewedYes
NPARC number21275919
Export citationExport as RIS
Report a correctionReport a correction
Record identifier0fc8d866-f537-4616-8fad-627fa83b2602
Record created2015-08-06
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)