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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 9 — Apr. 28, 2008
  • pp: 6216–6226

Planar plasmonic terahertz guided-wave devices

Wenqi Zhu, Amit Agrawal, and Ajay Nahata  »View Author Affiliations


Optics Express, Vol. 16, Issue 9, pp. 6216-6226 (2008)
http://dx.doi.org/10.1364/OE.16.006216


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Abstract

We describe the experimental realization of planar plasmonic THz guided-wave devices using periodically perforated metal films. These perforated films behave as effective media for which the dielectric function can be broadly engineered. We initially use transmission measurements to measure the complex dielectric constants of these effective media and show experimentally that the effective plasma frequency corresponds to the cutoff frequency of the rectangular apertures. Using these structures, we demonstrate not only straight planar THz waveguides, but also more complex devices such as Y-splitters and 3-dB couplers. In each of these embodiments, we demonstrate that the propagating THz radiation is well confined in both the in-plane and out-of-plane axes. This approach opens exciting new avenues for both passive and active THz guided-wave devices and circuits.

© 2008 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(240.6690) Optics at surfaces : Surface waves
(260.3090) Physical optics : Infrared, far
(160.1245) Materials : Artificially engineered materials
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Optics at Surfaces

History
Original Manuscript: February 28, 2008
Revised Manuscript: April 9, 2008
Manuscript Accepted: April 10, 2008
Published: April 18, 2008

Citation
Wenqi Zhu, Amit Agrawal, and Ajay Nahata, "Planar plasmonic terahertz guided-wave devices," Opt. Express 16, 6216-6226 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-9-6216


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