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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 31 — Nov. 1, 2013
  • pp: 7469–7478

Electrically controlled diffraction employing electrophoresis, supercapacitance, and total internal reflection

Jason C. Radel and Lorne A. Whitehead  »View Author Affiliations


Applied Optics, Vol. 52, Issue 31, pp. 7469-7478 (2013)
http://dx.doi.org/10.1364/AO.52.007469


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Abstract

The reflectance of a surface can be altered by controlling the concentration of dye ions in a region adjacent to an optically transparent and electrically conductive thin film. We present a method for nonmechanical light deflection achieved by altering the reflectance of a diffraction grating, an approach that creates new diffraction peaks that lie between those associated with the original grating spacing. We have demonstrated this effect by applying an electrical potential difference between interdigitated indium-tin oxide (ITO) electrodes and measuring the intensity of one of the new diffraction peaks. The measured diffraction peak intensities were found to reversibly deflect approximately 7% of the reflected light to previously nonexistent peaks. The diffraction grating was formed by patterning a thin film of planar, untreated ITO on a glass substrate using standard photolithography techniques. The size scale for this method of electrically controlled diffraction is limited only by the lithographic process; thus there is potential for the grating to deflect light to angles greater than those achievable using other methods. This approach could be used in applications such as telecommunications, where large deflection angles are required, or other applications where alternate beam-steering methods are cost prohibitive.

© 2013 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(240.0240) Optics at surfaces : Optics at surfaces
(260.6970) Physical optics : Total internal reflection
(190.2055) Nonlinear optics : Dynamic gratings
(240.6645) Optics at surfaces : Surface differential reflectance

ToC Category:
Optics at Surfaces

History
Original Manuscript: July 26, 2013
Revised Manuscript: October 1, 2013
Manuscript Accepted: October 1, 2013
Published: October 21, 2013

Citation
Jason C. Radel and Lorne A. Whitehead, "Electrically controlled diffraction employing electrophoresis, supercapacitance, and total internal reflection," Appl. Opt. 52, 7469-7478 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-31-7469


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