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Applied Optics

Applied Optics


  • Vol. 43, Iss. 18 — Jun. 20, 2004
  • pp: 3632–3639

Optical properties of porous helical thin films

Andy C. van Popta, Jeremy C. Sit, and Michael J. Brett  »View Author Affiliations

Applied Optics, Vol. 43, Issue 18, pp. 3632-3639 (2004)

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Porous dielectric thin films, composed of isolated helical columns, are fabricated by the glancing angle deposition technique. The selective reflection of circularly polarized light and the optical rotation of linearly polarized light are investigated as a function of film material and helical morphology. The strongest chiral optical response is observed for titanium-dioxide films because of its large refractive index. Optical rotatory powers as high as 4.5° are observed in 830-nm-thick helical films. By tailoring the pitch of the helical columns, the wavelength dependence of the circular reflection band is tuned to preferentially reflect red, green, or blue light, a promising quality for display applications.

© 2004 Optical Society of America

OCIS Codes
(160.1190) Materials : Anisotropic optical materials
(230.3720) Optical devices : Liquid-crystal devices
(230.4000) Optical devices : Microstructure fabrication
(240.0310) Optics at surfaces : Thin films
(310.1860) Thin films : Deposition and fabrication
(310.6860) Thin films : Thin films, optical properties

Original Manuscript: October 3, 2003
Revised Manuscript: March 30, 2004
Published: June 20, 2004

Andy C. van Popta, Jeremy C. Sit, and Michael J. Brett, "Optical properties of porous helical thin films," Appl. Opt. 43, 3632-3639 (2004)

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  1. N. O. Young, J. Kowal, “Optically active fluorite films,” Nature (London) 183, 104–105 (1959). [CrossRef]
  2. A. Lakhtakia, W. S. Weiglhofer, “On light propagation in helicoidal bianisotropic mediums,” Proc. R. Soc. London Ser. A 448, 419–437 (1995). [CrossRef]
  3. R. M. A. Azzam, “Chiral thin solid films: method of deposition and applications,” Appl. Phys. Lett. 61, 3118–3120 (1992). [CrossRef]
  4. K. Robbie, M. J. Brett, A. Lakhtakia, “First thin film realization of a helicoidal bianisotropic medium,” J. Vac. Sci. Technol. A 13, 2991–2993 (1995). [CrossRef]
  5. K. Robbie, M. J. Brett, A. Lakhtakia, “Chiral sculptured thin films,” Nature (London) 384, 616 (1996). [CrossRef]
  6. K. Robbie, M. J. Brett, “Sculptured thin films and glancing angle deposition: growth mechanics and applications,” J. Vac. Sci. Technol. A 15, 1460–1465 (1997). [CrossRef]
  7. I. Hodgkinson, Q. H. Wu, A. McPhun, “Incremental-growth model for the deposition of spatially modulated thin-film nanostructures,” J. Vac. Sci. Technol. B 16, 2811–2816 (1998). [CrossRef]
  8. P. D. Sunal, A. Lakhtakia, R. Messier, “Simple model for dielectric thin-film helicoidal bianisotropic media,” Opt. Commun. 158, 119–126 (1998). [CrossRef]
  9. A. Lakhtakia, “Dielectric sculptured thin films for polarization-discriminatory handedness-inversion of circularly polarized light,” Opt. Eng. 38, 1596–1602 (1999). [CrossRef]
  10. I. Hodgkinson, Q. H. Wu, B. Knight, A. Lakhtakia, K. Robbie, “Vacuum deposition of chiral sculptured thin films with high optical activity,” Appl. Opt. 39, 642–649 (2000). [CrossRef]
  11. Q. Wu, I. J. Hodgkinson, A. Lakhtakia, “Circular polarization filters made of chiral sculptured thin films: experimental and simulation results,” Opt. Eng. 39, 1863–1868 (2000). [CrossRef]
  12. V. H. Zocher, “Optische anisotropie selektiv absorbierender stoffe,” Naturwissenschaften 13, 1015–1021 (1925). [CrossRef]
  13. F. J. Kahn, “Orientation of liquid crystals by surface coupling agents,” Appl. Phys. Lett. 22, 386–388 (1973). [CrossRef]
  14. J. L Janning, “Thin-film surface orientation for liquid crystals,” Appl. Phys. Lett. 21, 173–174 (1972). [CrossRef]
  15. W. M. Gibbons, P. J. Shannon, S. T. Sun, B. J. Swetlin, “Surface-mediated alignment of nematic liquid crystals with polarized laser light,” Nature (London) 351, 49–50 (1991). [CrossRef]
  16. K. Robbie, D. J. Broer, M. J. Brett, “Chiral nematic order in liquid crystals imposed by an engineered inorganic nanostructure,” Nature (London) 399, 764–766 (1999). [CrossRef]
  17. J. C. Sit, D. J. Broer, M. J. Brett, “Alignment and switching of nematic liquid crystals embedded in porous chiral thin films,” Liq. Cryst. 27, 387–391 (2000). [CrossRef]
  18. S. R. Kennedy, J. C. Sit, D. J. Broer, M. J. Brett, “Optical activity of chiral thin film and liquid crystal hybrids,” Liq. Cryst. 28, 1799–1803 (2001). [CrossRef]
  19. C. Binet, M. Mitov, M. Mauzac, “Switchable broadband light reflection in polymer-stabilized cholesteric liquid crystals,” J. Appl. Phys. 90, 1730–1734 (2001). [CrossRef]
  20. R. A. M. Hikmet, H. Kemperman, “Electrically switchable mirrors and optical components made from liquid-crystal gels,” Nature (London) 392, 476–479 (1998). [CrossRef]
  21. A. Lakhtakia, M. W. McCall, J. A. Sherwin, Q. H. Wu, I. J. Hodgkinson, “Sculptured-thin-film spectral holes for optical sensing of fluids,” Opt. Commun. 194, 33–46 (2001). [CrossRef]
  22. I. J. Hodgkinson, Q. H. Wu, M. Arnold, M. W. McCall, A. Lakhtakia, “Chiral mirror and optical resonator designs for circularly polarized light: suppression of cross-polarized reflectances and transmittances,” Opt. Commun. 210, 201–211 (2002). [CrossRef]
  23. K. D. Harris, A. Huizinga, M. J. Brett, “High-speed porous thin-film humidity sensors,” Electrochem. Solid-State Lett. 5, H27–H29 (2002). [CrossRef]
  24. S. R. Kennedy, M. J. Brett, O. Toader, S. John, “Fabrication of tetragonal square spiral photonic crystals,” Nano Lett. 2, 59–62 (2002). [CrossRef]
  25. S. R. Kennedy, M. J. Brett, H. Miguez, O. Toader, S. John, “Optical properties of a three-dimensional silicon square spiral photonic crystal,” Photon. Nanostruct. 1, 37–42 (2003). [CrossRef]
  26. K. Robbie, J. C. Sit, M. J. Brett, “Advanced techniques for glancing angle deposition,” J. Vac. Sci. Technol. B 16, 1115–1122 (1998). [CrossRef]
  27. K. Robbie, C. Shafai, M. J. Brett, “Thin films with nanometer-scale pillar microstructure,” J. Mater. Res. 14, 3158–3163 (1999). [CrossRef]
  28. D. Vick, Y. Y. Tsui, M. J. Brett, R. Fedosejevs, “Production of porous carbon thin films by pulsed laser deposition,” Thin Solid Films 350, 49–52 (1999). [CrossRef]
  29. J. C. Sit, D. Vick, K. Robbie, M. J. Brett, “Thin-film microstructure control using glancing angle deposition by sputtering,” J. Mater. Res. 14, 1197–1199 (1999). [CrossRef]
  30. E. Collett, Polarized Light: Fundamentals and Applications (Marcel Dekker, New York, 1993).
  31. I. J. Hodgkinson, Q. H. Wu, K. M. McGrath, “Moisture absorption effects in biaxial and chiral optical thin film coatings,” in Engineered Nanostructural Films and Materials, A. Lakhtakia, R. F. Messier, eds., Proc. SPIE3790, 184–194 (1999). [CrossRef]
  32. S. R. Kennedy, M. J. Brett, “Porous broadband antireflection coating by glancing angle deposition,” Appl. Opt. 42, 4573–4579 (2003). [CrossRef] [PubMed]
  33. K. N. Rao, “Influence of deposition parameters on optical properties of TiO2 films,” Opt. Eng. 41, 2357–2364 (2002). [CrossRef]
  34. H. K. Pulker, G. Paesold, E. Ritter, “Refractive indices of TiO2 films produced by reactive evaporation of various titanium-oxygen phases,” Appl. Opt. 15, 2986–2991 (1976). [CrossRef] [PubMed]
  35. J. M. Bennett, E. Pelletier, G. Albrand, J. P. Borgogno, B. Lazarides, C. K. Carniglia, R. A. Schmell, T. H. Allen, T. Tuttle-Hart, K. H. Guenther, A. Saxer, “Comparison of the properties of titanium dioxide films prepared by various techniques,” Appl. Opt. 28, 3303–3317 (1989). [CrossRef] [PubMed]
  36. K. Robbie, M. Brett, “Thin film HBMs and associated optical phenomena,” in Proceedings of Electromagnetics of Complex Media Bianisotropics, W. S. Weiglhofer, ed. (Glasgow University, Glasgow, Scotland, 1997), pp. 69–71.
  37. S. Chandrasekhar, Liquid Crystals (Cambridge University, Cambridge, England, 1992). [CrossRef]
  38. P. Yeh, C. Gu, Optics of Liquid Crystal Displays (Wiley, New York, 1999).

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