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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 11 — May. 30, 2005
  • pp: 3921–3930

Control of enhanced THz transmission through metallic hole arrays using nematic liquid crystal

Ci-Ling Pan, Cho-Fan Hsieh, Ru-Pin Pan, Masaki Tanaka, Fumiaki Miyamaru, Masahiko Tani, and Masanori Hangyo  »View Author Affiliations

Optics Express, Vol. 13, Issue 11, pp. 3921-3930 (2005)

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We demonstrate frequency tuning of enhanced THz radiation transmitted through a two-dimensional metallic hole array (2D-MHA) by controlling the index of refraction of the medium filling the holes and adjacent to the 2D-MHA on one side. The medium is a nematic liquid crystal (NLC) and its index of refraction is varied using magnetically controlled birefringence of the NLC. With the NLC, the peak transmission frequency of the 2D-MHA shift to the red by 0.112 THz and can be tuned from 0.193 to 0.188 THz. The peak transmittance is as high as 70% or an enhancement of 2.42 times, considering the porosity of the 2D-MHA. As a tunable THz filter, this device exhibits a continuous tuning range of 4.7 GHz, a low insertion loss of 2.35 to 1.55 dB and a quality factor of ~4–5.

© 2005 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(050.1220) Diffraction and gratings : Apertures
(120.2440) Instrumentation, measurement, and metrology : Filters
(230.3720) Optical devices : Liquid-crystal devices
(240.6680) Optics at surfaces : Surface plasmons
(260.3090) Physical optics : Infrared, far
(320.0320) Ultrafast optics : Ultrafast optics

ToC Category:
Research Papers

Original Manuscript: April 5, 2005
Revised Manuscript: April 29, 2005
Published: May 30, 2005

Ci-Ling Pan, Cho-Fan Hsieh, Ru-Pin Pan, Masaki Tanaka, Fumiaki Miyamaru, Masahiko Tani, and Masanori Hangyo, "Control of enhanced THz transmission through metallic hole arrays using nematic liquid crystal," Opt. Express 13, 3921-3930 (2005)

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