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Proceedings Paper

Using film nanostructure to control photoluminescence angular emission profiles
Author(s): M. T. Taschuk; J. P. Gospodyn; J. C. Sit; M. J. Brett
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Paper Abstract

Luminescent thin films are used for many applications, including light-emitting diodes, lasers and flat panel displays. Glancing angle deposition (GLAD) is a physical vapor deposition technique which relies on highly oblique flux angles to create porous thin films. When combined with real-time substrate motion control and measurement of deposition rates, it is possible to produce high quality nanostructered thin films. A rugate filter uses a sinusoidally varying index profile to produce a stop band. Using the GLAD technique, it is possible to produce a rugate filter from a single material. The central wavelength, depth and width of the stop band can be designed by adjusting the film nanostructure. In this paper, rugates composed of Y2O3:Eu are used to control the angular emission profiles of the photoluminescent thin film. Confined, annular and isotropic emission profiles film is nearly uniform for emission angles between ~ -60° and ~60°.

Paper Details

Date Published: 5 February 2008
PDF: 9 pages
Proc. SPIE 6890, Optical Components and Materials V, 689005 (5 February 2008); doi: 10.1117/12.763382
Show Author Affiliations
M. T. Taschuk, Univ. of Alberta (Canada)
J. P. Gospodyn, Northern Alberta Institute of Technology (Canada)
J. C. Sit, Univ. of Alberta (Canada)
M. J. Brett, Univ. of Alberta (Canada)
NRC National Institute for Nanotechnology (Canada)

Published in SPIE Proceedings Vol. 6890:
Optical Components and Materials V
Michel J. F. Digonnet; Shibin Jiang; John W. Glesener; J. Christopher Dries, Editor(s)

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