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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 11 — May. 21, 2012
  • pp: 12119–12126

Reconfigurable plasmonic devices using liquid metals

Jinqi Wang, Shuchang Liu, and Ajay Nahata  »View Author Affiliations

Optics Express, Vol. 20, Issue 11, pp. 12119-12126 (2012)

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We experimentally demonstrate an approach to create reconfigurable plasmonic devices in which the geometry of the device can be changed dramatically. The specific embodiment we present utilizes eutectic gallium indium (EGaIn), a metal that is liquid at room temperature, which is injected into or withdrawn from channels encapsulated by a polydimethylsiloxane (PDMS) bullseye mold fabricated on a gold coated substrate. Using terahertz (THz) time-domain spectroscopy, we measure the enhanced transmission properties of a single subwavelength aperture surrounded by differing numbers of concentric annular EGaIn rings. The results obtained from different device geometries, with either a single or multiple rings, are performed using a single device, demonstrating true reconfigurability. We explain the properties of the observed temporal waveforms using a simple time-domain model. This represents, we believe, a first step in developing more complex reconfigurable plasmonic devices.

© 2012 OSA

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(160.3900) Materials : Metals
(240.6680) Optics at surfaces : Surface plasmons
(260.3090) Physical optics : Infrared, far

ToC Category:
Optics at Surfaces

Original Manuscript: April 9, 2012
Revised Manuscript: May 1, 2012
Manuscript Accepted: May 3, 2012
Published: May 14, 2012

Jinqi Wang, Shuchang Liu, and Ajay Nahata, "Reconfigurable plasmonic devices using liquid metals," Opt. Express 20, 12119-12126 (2012)

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