Surface-Enhanced Resonance Raman Scattering (SERRS) Using Au Nanohole Arrays on Optical Fiber Tips

• DOI: 10.1007/s11468-013-9518-x
• Publication Date: 2013-03-18T13:25:56Z
• Authors: Gustavo F. S. And...; Juliano G. Hayashi; Mohammad M. Rahman; Walter J. Salcedo; Cristiano M. B. C...; Alexandre G. Brolo
• Keywords: Nanoprobe

Circular and bow tie-shaped Au nanoholes arrays were fabricated on gold films deposited on the tips of single-mode optical fibers. The nanostructures were milled using focused ion beam with a high quality control of their shapes and sizes. The optical fiber devices were used for surface-enhanced resonance Raman scattering (SERRS) measurements in both back- and forward-scattering geometries, yielding promising performance in both detection arrangements. The effect of the hole shape on the SERRS performance was explored with the bow tie nanostructures presenting a better SERRS performance than the circular holes arrays. The results present here are another step towards the development of optical fiber tips modified with plasmonic nanostructures for SERRS applications.