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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 1, Iss. 5 — May. 5, 2006

Voltage-controlled liquid-crystal terahertz phase shifter and quarter-wave plate

Cho-Fan Hsieh, Ru-Pin Pan, Tsung-Ta Tang, Hung-Lung Chen, and Ci-Ling Pan  »View Author Affiliations


Optics Letters, Vol. 31, Issue 8, pp. 1112-1114 (2006)
http://dx.doi.org/10.1364/OL.31.001112


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Abstract

Phase shift exceeding π 2 at 1 THz is demonstrated by using electrically controlled birefringence in a homeotropically aligned nematic liquid crystal (E7) cell, 570 μ m in thickness. The driving voltage required for a phase shift of 90° is 125 V (rms). We demonstrate that the phase shifter works as an electrically switchable quarter-wave plate at 1 THz . The device can also be used as an electrically tuned phase compensator around the quarter-wave point near 1 THz .

© 2006 Optical Society of America

OCIS Codes
(050.5080) Diffraction and gratings : Phase shift
(230.3720) Optical devices : Liquid-crystal devices
(260.3090) Physical optics : Infrared, far
(260.5430) Physical optics : Polarization
(320.0320) Ultrafast optics : Ultrafast optics

ToC Category:
Optical Devices

History
Original Manuscript: November 7, 2005
Revised Manuscript: January 2, 2006
Manuscript Accepted: January 9, 2006

Virtual Issues
Vol. 1, Iss. 5 Virtual Journal for Biomedical Optics

Citation
Cho-Fan Hsieh, Ru-Pin Pan, Tsung-Ta Tang, Hung-Lung Chen, and Ci-Ling Pan, "Voltage-controlled liquid-crystal terahertz phase shifter and quarter-wave plate," Opt. Lett. 31, 1112-1114 (2006)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-31-8-1112


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