OSA's Digital Library

Optics Express

Optics Express

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

Optics InfoBase > Optics Express > Volume 12 > Issue 12 > Page 2625

Magnetically tunable room-temperature 2 pi 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)
http://dx.doi.org/10.1364/OPEX.12.002625


View Full Text Article

Enhanced HTML    Acrobat PDF (124 KB)


Advanced Search

Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

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

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

Citation
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)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-12-12-2625


Sort:  Journal  |  Reset  

References

  1. D. Mittleman, �??Terahertz Imaging,�?? in Sensing with THz radiation, (Spring-Verlag, New York, 2002).
  2. Peter H. Siegel,�?? Terahertz technology,�?? IEEE Trans. Microwave Theory Tech., 50, 910-928 (2002). [CrossRef]
  3. B. Ferguson and X.-C. Zhang,�?? Materials for terahertz science and technology,�?? Nature Materials, 1, 26-33 (2002). [CrossRef]
  4. I. H. Libon, S. Baumgärtner, M. Hempel, N. E. Hecker, J. Feldmann, M. Koch, and P. Dawson, �??An optically controllable terahertz filter,�?? Appl. Phys. Lett. 76, 2821-2823 (2000). [CrossRef]
  5. R. Kersting, G. Strasser, and K. Unterrainer,�?? Terahertz phase modulator,�?? Electron. Lett. 36, 1156-1158 (2000). [CrossRef]
  6. T. Kleine Ostmann, M. Koch, and P. Dawson,�?? Modulation THz radiation by semiconductor nanostructures,�?? Microwave Opt. Tech. Lett. 35, 343-345 (2002). [CrossRef]
  7. K. C. Lim, J. D. Margerum, and A. M. Lackner,�?? Liquid crystal millimeter wave electronic phase shifter,�?? Appl. Phys. Lett. 62, 1065-1067 (1993). [CrossRef]
  8. D. Dolfi, M. Labeyrie, P. Joffre, and J. P. Huignard,�?? Liquid crystal microwave phase shifter,�?? Electron. Lett. 29, 926-928 (1993). [CrossRef]
  9. T.-R. Tsai, C.-Y. Chen, C.-L. Pan, R.-P. Pan, and X.-C. Zhang,�?? Terahertz time-domain spectroscopy studies of the optical constants of the nematic liquid crystal 5CB,�?? Appl. Opt. 42, 2372-2376 (2003). [CrossRef] [PubMed]
  10. R.-P. Pan, T.-R. Tsai, C.-Y. Chen, C.-H. Wang, and C.-L. Pan,�?? The refractive indices of nematic liquid crystal 4�??-n-pentyl-4-cyanobiphenyl in the THz frequency range,�?? Mol. Cryst. Liq. Cryst. (to be published in May 2004 ). [CrossRef]
  11. T.-R Tsai, C.-Y. Chen, R.-P. Pan, C.-L. Pan, and X.-C. Zhang,�?? Electrically controlled room temperature terahertz phase shifter with liquid crystal,�?? IEEE Microwave Wireless Comp. Lett. 14, 77-79 (2004). [CrossRef]
  12. C.-Y. Chen, T.-R Tsai, C.-L. Pan, R.-P. Pan,�?? Room temperature terahertz phase shifter based on magnetically controlled birefringence in liquid crystals,�?? Appl. Phys. Lett. 83, 4497-4499 (2003). [CrossRef]
  13. P. G. de Gennes and J. Prost, The Physics of Liquid Crystals, 2nd ed. (Oxford, New York, 1983), Chap. 3.
  14. D.-D. Huang, X.-J. Yu, H.-C. Huang, and H.-S. Kwok,�?? Design of polarizing color filters with double-liquid-crystal cells,�?? Appl. Opt. 41, 4638-4644 (2002). [CrossRef] [PubMed]
  15. K. Komori, T. Sugaya, M. Watanabe, T. Hidaka,�?? Ultrafast coherent control of excitons using pulse-shaping technique,�?? Jan. J. Appl. Phys. 39, 2347-2352 (2000).
  16. F. J. Kahn,�?? Orientation of liquid crystals by surface coupling agents,�?? Appl. Phys. Lett. 22, 386-388 (1973). [CrossRef]
  17. Z. Jiang, M. Li, and X. -C. Zhang,�?? Dielectric constant measurement of thin films by differential time-domain spectroscopy,�?? Appl. Phys. Lett. 76, 3221-3223 (2000). [CrossRef]
  18. P. Yeh, and C. Gu, Optics of Liquid Crystal Displays, (Wiley Interscience Publication, New York, 1999), Chap. 3.
  19. R.-P. Pan, T.-R. Tsai, C.-Y. Chen, and C.-L. Pan,�?? Optical constants of two typical liquid crystals 5CB and PCH5 in the THz frequency range,�?? J. Bio. Phys. 29, 335-338 (2003). [CrossRef]
  20. Eugene Hecht, Optics, 3rd ed. (Addison Wesley Longman, New York, 1998), Chap. 4.

Cited By

 Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

Figures

Fig. 1. Fig. 2. Fig. 3.
 
Fig. 4.
 

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited