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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 12, Iss. 12 — Jun. 14, 2004
  • pp: 2625–2630

Magnetically tunable room-temperature 2π liquid crystal terahertz phase shifter

Chao-Yuan Chen, Cho-Fan Hsieh, Yea-Feng Lin, Ru-Pin Pan, and Ci-Ling Pan  »View Author Affiliations

Optics Express, Vol. 12, Issue 12, pp. 2625-2630 (2004)

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Tunable phase shift up to 360° at 1 THz is achieved with a liquid crystal (LC) device. The key to this design is (1) the use of a nematic LC, E7, which exhibits a birefringence of ~0.17 (0.2–1.2 THz); (2) a LC cell (3-mm in thickness) with sandwiched structure to increase the interaction length while minimizing interface Fresnel losses; and (3) the use of magnetic field to align the thick LC cell and achieve continuous tuning of phase from 0 to 360°. This device can be operated over a broad range near room temperature.

© 2004 Optical Society of America

OCIS Codes
(230.3720) Optical devices : Liquid-crystal devices
(260.3090) Physical optics : Infrared, far
(320.0320) Ultrafast optics : Ultrafast optics

ToC Category:
Research Papers

Original Manuscript: April 23, 2004
Revised Manuscript: May 26, 2004
Published: June 14, 2004

Chao-Yuan Chen, Cho-Fan Hsieh, Yea-Feng Lin, Ru-Pin Pan, and Ci-Ling Pan, "Magnetically tunable room-temperature 2 pi liquid crystal terahertz phase shifter," Opt. Express 12, 2625-2630 (2004)

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