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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 21 — Oct. 21, 2013
  • pp: 24422–24430

Terahertz plasmonic waveguides created via 3D printing

Shashank Pandey, Barun Gupta, and Ajay Nahata  »View Author Affiliations

Optics Express, Vol. 21, Issue 21, pp. 24422-24430 (2013)

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We demonstrate that 3D printing, commonly associated with the manufacture of large objects, allows for the fabrication of high quality terahertz (THz) plasmonic structures. Using a commercial 3D printer, we print a variety of structures that include abrupt out-of-plane bends and continuously varying bends. The waveguides are initially printed in a polymer resin and then sputter deposited with ~500 nm of Au. This thickness of Au is sufficient to support low loss propagation of surface plasmon-polaritons with minimal impact from the underlying layer, thereby demonstrating a useful approach for fabricating a broad range of plasmonic structures that incorporate complex geometries. Using THz time-domain spectroscopy, we measure the guided-wave properties of these devices. We find that the propagation properties of the guided-wave modes are similar to those obtained in similar conventional metal-based waveguides, albeit with slightly higher loss. This additional loss is attributed to roughness associated with limitations that currently exist in commercial 3D printers.

© 2013 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(240.6680) Optics at surfaces : Surface plasmons
(300.6495) Spectroscopy : Spectroscopy, teraherz
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:

Original Manuscript: July 8, 2013
Revised Manuscript: September 27, 2013
Manuscript Accepted: October 1, 2013
Published: October 7, 2013

Shashank Pandey, Barun Gupta, and Ajay Nahata, "Terahertz plasmonic waveguides created via 3D printing," Opt. Express 21, 24422-24430 (2013)

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