Journal
OPTICS LETTERS
Volume 39, Issue 20, Pages 5822-5825Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.39.005822
Keywords
-
Categories
Funding
- US National Science Foundation [ECCS-1325367]
- Ministry of Education, Youth and Sport of the Czech Republic within the U. S.-Czech S&T Cooperation Agreement [LH 11038]
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1325367] Funding Source: National Science Foundation
Ask authors/readers for more resources
An unclad, multi-mode single crystal sapphire fiber was used as a platform, and immobilized colloidal Ag nano-particles (NPs) were used as enabler, for evanescent-field fiber-optic sensing via surface-enhanced Raman scattering (SERS) of Rhodamine 6G (R6G) solution. The dependence of the measured Raman intensity on NP coverage density (to a maximum of 120 particles/mu m(2)) as well as the coverage length (to a maximum of 6 cm) was investigated. We demonstrate the utility of SERS-active sapphire fibers for sensitive measurements (10(-8) M R6G). We further reveal, with the aid of theoretical analysis, that multi-mode fiber offers a significant advantage compared to its single-mode counterpart because the former allows two orders of magnitude higher particle coverage density than the latter to maximize SERS benefit, while maintaining the dominance of Raman gain despite the competitive interplay of NP-induced absorption and scattering loss along the interaction path length. (C) 2014 Optical Society of America
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available