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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 23 — Dec. 1, 2012
  • pp: 4979–4981

Frequency-chirped subwavelength nanoantennas

Ami Yaacobi and Michael R. Watts  »View Author Affiliations

Optics Letters, Vol. 37, Issue 23, pp. 4979-4981 (2012)

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Herein we propose, theoretically investigate, and numerically demonstrate the first use to our knowledge of frequency chirping to achieve broadband, efficient subwavelength vertical emission from a dielectric waveguide. We demonstrate this unique and effective approach in the telecom C band in a nanophotonic frequency-chirped dipole antenna. The structure utilizes a plasmonic antenna placed above an Si3N4 waveguide and a ground plane to enhance emission efficiency. Three-dimensional finite-difference time-domain simulations reveal up to 55% vertical emission efficiency, and a bandwidth of 500 nm is possible in a structure less than half a wavelength long. The design methodology and theoretical underpinnings of frequency-chirped nanophotonic antennas coupled to dielectric waveguides are presented.

© 2012 Optical Society of America

OCIS Codes
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(130.0130) Integrated optics : Integrated optics
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: September 12, 2012
Revised Manuscript: November 5, 2012
Manuscript Accepted: November 5, 2012
Published: November 30, 2012

Ami Yaacobi and Michael R. Watts, "Frequency-chirped subwavelength nanoantennas," Opt. Lett. 37, 4979-4981 (2012)

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