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Proceedings Paper

Synthesis and characterization of hydrothermally grown zinc oxide (ZnO) nanorods for optical waveguide application
Author(s): Chandan Abhishek Pandey; Rafis Rahim; S. Manjunath; Gabor L. Hornyak; Waleed S. Mohammed
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Paper Abstract

We report a simple method to synthesize Zinc oxide nanorods, grown without using catalysis with less complicity. This was done by hydrothermal treatment of zinc nitrate and hexamine at 90°C and various times (5- 20h) and also we find that the nanorod size and shape depends on heating rate, temperature and heating time. ZnO nanorods have been investigated for their light guiding ability and their effective index of refraction for use in near air index optical systems by developing a ridge waveguide structure. ZnO nanorod waveguides (100 μm w x 2.5 μm h x 1mm l) were grown on a seeded glass substrate template using hydrothermal process at 90°C. Modification of the substrate surface in order to obtain dense perpendicularly-oriented ordered nanorods induced selective growth. These structures were characterized by SEM, EDX, and XRD. The guiding property, i.e. locally excited photoluminescence propagation along the length of the waveguide, was analyzed with imageprocessing program in MATLAB. Following application of a fiber optic white light source on the ZnO nanostructure, we found that light propagation occurred within the glass substrate. No such propagation occurred if light was applied on uncoated areas of the glass. Modeling of waveguide behavior to determine the number propagating modes was exercised using waveguide mode solver in COMSOL.

Paper Details

Date Published: 29 July 2015
PDF: 8 pages
Proc. SPIE 9659, International Conference on Photonics Solutions 2015, 96590X (29 July 2015); doi: 10.1117/12.2196129
Show Author Affiliations
Chandan Abhishek Pandey, Asian Institute of Technology (Thailand)
Vellore Institute of Technology (India)
Rafis Rahim, Bangkok Univ. (Thailand)
S. Manjunath, Vellore Institute of Technology (Thailand)
Bangkok Univ. (India)
Gabor L. Hornyak, Asian Institute of Technology (Thailand)
Waleed S. Mohammed, Bangkok Univ. (Thailand)

Published in SPIE Proceedings Vol. 9659:
International Conference on Photonics Solutions 2015
Surasak Chiangga; Sarun Sumriddetchkajorn, Editor(s)

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