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Proceedings Paper

Biological fabrication of nanostructured silicon-germanium photonic crystals possessing unique photoluminescent and electroluminescent properties
Author(s): Gregory L. Rorrer; Clayton Jeffryes; Chih-hung Chang; Doo-Hyoung Lee; Timothy Gutu; Jun Jiao; Raj Solanki
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Paper Abstract

Diatoms are single-celled algae which possess silica shells called "frustules" that contain periodic submicron scale features. A diatom cell culture process was used to fabricate a two-dimensional photonic crystal slab of Ge-doped biosilica that possessed 120 nm holes, 330 nm lattice constant, and dielectric constant of 8.5. This material was integrated into an electroluminescent (EL) device by spin coating of the frustules onto indium tin oxide, followed by atomic layer deposition of 400 nm hafnium silicate. No photonic band gap was predicted. However, the EL spectrum possessed resonant UV line emissions that were consistent with photonic band calculations. An EL band gap between 500-640 nm was also observed between blue and red EL line emissions. These EL characteristics have not been observed previously, and are unique to the diatom photonic crystal. This study represents a first step towards the realization of optoelectronic devices which utilize nanoscale components fabricated through cell culture.

Paper Details

Date Published: 11 September 2007
PDF: 10 pages
Proc. SPIE 6645, Nanoengineering: Fabrication, Properties, Optics, and Devices IV, 66450A (11 September 2007); doi: 10.1117/12.735365
Show Author Affiliations
Gregory L. Rorrer, Oregon State Univ. (United States)
Clayton Jeffryes, Oregon State Univ. (United States)
Chih-hung Chang, Oregon State Univ. (United States)
Doo-Hyoung Lee, Oregon State Univ. (United States)
Timothy Gutu, Portland State Univ. (United States)
Jun Jiao, Portland State Univ. (United States)
Raj Solanki, Portland State Univ. (United States)

Published in SPIE Proceedings Vol. 6645:
Nanoengineering: Fabrication, Properties, Optics, and Devices IV
Elizabeth A. Dobisz; Louay A. Eldada, Editor(s)

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