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- Optical fiber sensor based on oblique angle deposition
- Jayawardhana, Sasani; Kostovski, Gorgi; Mazzolini, Alex P.; Stoddart, Paul R.
- The technique of oblique angle deposition has been extended to the fabrication of nanostructured metal coatings on the tips of standard silica optical fibers by thermal evaporation. The coatings are initiated as metal island films, which grow into extended rodlike structures as the deposition continues. The nanorod coatings demonstrate excellent surface-enhanced Raman scattering performance with variability of less than 10% as shown by direct measurements off the fiber tip with thiophenol as a test analyte. However, in the remote sensing configuration, the nanorod structures perform no better than thin metal island films. This appears to be mainly due to reduced transmission when nanorod lengths exceed ~100 nm. Moreover, the variability of remote measurements is increased to 18%. This is believed to be due to variations in coupling efficiency.
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Faculty of Engineering and Industrial Sciences
- Applied Optics, Vol. 50, no. 2 (Jan 2011), pp. 155-162
- Publication year
- FOR Code(s)
- 0205 Optical Physics; 1113 Ophthalmology and Optometry
- Oblique angle deposition; Optical fibres; Sensors; SERS; Surface-enhanced Raman scattering
- Optical Society of America
- Publisher URL
- Copyright © 2011 Optical Society of America. Published version of the paper reproduced here in accordance with the copyright policy of the publisher.
- Research Projects
- Full text
- Peer reviewed