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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 16 — Aug. 2, 2010
  • pp: 16745–16750

Long-pitch cholesteric liquid crystal cell for switchable achromatic reflection

Ki-Han Kim, Hye-Jung Jin, Kyoung-Ho Park, Joun-Ho Lee, Jae Chang Kim, and Tae-Hoon Yoon  »View Author Affiliations

Optics Express, Vol. 18, Issue 16, pp. 16745-16750 (2010)

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We propose a switchable achromatic reflector using a long-pitch cholesteric liquid crystal (CLC) whose Bragg reflection wavelength is chosen to be infrared by controlling the pitch of the CLC so that the planar texture is transparent over the entire visible wavelength. By using the light scattering of the focal conic texture, achromatic reflection can be achieved. Both textures are stable at zero electric field and the operating voltage of the proposed CLC device is much lower than that of conventional CLC devices. The proposed switchable reflector, which can be operated at a low voltage with low power, can be applied to reflective displays and to light shutters. By coupling with a reflective polarizer the efficiency of light scattering at the focal conic texture can be enhanced.

© 2010 OSA

OCIS Codes
(230.0230) Optical devices : Optical devices
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Optical Devices

Original Manuscript: June 1, 2010
Revised Manuscript: July 9, 2010
Manuscript Accepted: July 14, 2010
Published: July 23, 2010

Ki-Han Kim, Hye-Jung Jin, Kyoung-Ho Park, Joun-Ho Lee, Jae Chang Kim, and Tae-Hoon Yoon, "Long-pitch cholesteric liquid crystal cell for switchable achromatic reflection," Opt. Express 18, 16745-16750 (2010)

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