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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 39, Iss. 4 — Feb. 1, 2000
  • pp: 642–649

Vacuum Deposition of Chiral Sculptured Thin Films with High Optical Activity

Ian Hodgkinson, Qi hong Wu, Ben Knight, Akhlesh Lakhtakia, and Kevin Robbie  »View Author Affiliations


Applied Optics, Vol. 39, Issue 4, pp. 642-649 (2000)
http://dx.doi.org/10.1364/AO.39.000642


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Abstract

We present the technique of bideposition to realize thin-film helicoidal bianisotropic mediums (TFHBM’s) that exhibit high optical activity. We show, by experiment as well as by simulation, that the optical rotation produced by these chiral sculptured thin films is roughly proportional to the square of the local linear birefringence. Experimental measurements on bideposited TFHBM’s of titanium oxide yield a typical value of 5°/μm for the effective specific rotation in the short-wavelength regime; the corresponding value determined for the standard unideposited TFHBM’s is 1°/μm. Both types of TFHBM’s are highly optically active in comparison with quartz, fluorite films, and cholesteric liquid crystals. Bideposited TFHBM’s will lend themselves to many different types of optical devices.

© 2000 Optical Society of America

OCIS Codes
(160.1190) Materials : Anisotropic optical materials
(240.0310) Optics at surfaces : Thin films
(260.1440) Physical optics : Birefringence
(310.1620) Thin films : Interference coatings
(310.1860) Thin films : Deposition and fabrication
(310.3840) Thin films : Materials and process characterization
(310.6860) Thin films : Thin films, optical properties

Citation
Ian Hodgkinson, Qi hong Wu, Ben Knight, Akhlesh Lakhtakia, and Kevin Robbie, "Vacuum Deposition of Chiral Sculptured Thin Films with High Optical Activity," Appl. Opt. 39, 642-649 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-4-642

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