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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 27 — Dec. 19, 2011
  • pp: 26666–26671

Optics InfoBase > Optics Express > Volume 19 > Issue 27 > Page 26666

High-contrast terahertz modulator based on extraordinary transmission through a ring aperture

Jie Shu, Ciyuan Qiu, Victoria Astley, Daniel Nickel, Daniel M. Mittleman, and Qianfan Xu  »View Author Affiliations


Optics Express, Vol. 19, Issue 27, pp. 26666-26671 (2011)
http://dx.doi.org/10.1364/OE.19.026666


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Abstract

We demonstrated extraordinary THz transmission through ring apertures on a metal film. Transmission of 60% was obtained with an aperture-to-area ratio of only 1.4%. We show that the high transmission can be suppressed by over 18 dB with a thin layer of free carriers in the silicon substrate underneath the metal film. This result suggests that CMOS-compatible terahertz modulators can be built by controlling the carrier density near the aperture.

© 2011 OSA

OCIS Codes
(120.7000) Instrumentation, measurement, and metrology : Transmission
(260.5740) Physical optics : Resonance
(300.6495) Spectroscopy : Spectroscopy, teraherz
(200.6715) Optics in computing : Switching

ToC Category:
Diffraction and Gratings

History
Original Manuscript: October 17, 2011
Revised Manuscript: November 28, 2011
Manuscript Accepted: December 2, 2011
Published: December 14, 2011

Citation
Jie Shu, Ciyuan Qiu, Victoria Astley, Daniel Nickel, Daniel M. Mittleman, and Qianfan Xu, "High-contrast terahertz modulator based on extraordinary transmission through a ring aperture," Opt. Express 19, 26666-26671 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-27-26666


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