Optical Properties of Porous Helical Thin Films
Applied Optics, Vol. 43, Issue 18, pp. 3632-3639 (2004)
http://dx.doi.org/10.1364/AO.43.003632
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Abstract
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
Citation
Andy C. van Popta, Jeremy C. Sit, and Michael J. Brett, "Optical Properties of Porous Helical Thin Films," Appl. Opt. 43, 3632-3639 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-18-3632
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