Structure fits the purpose: photonic crystal fibers for evanescent-field surface-enhanced Raman spectroscopy.
We report numerical simulation and hyperspectral Raman imaging of three index-guiding solid-core photonic crystal fibers (PCFs) of different air-cladding microstructures to assess their respective potential for evanescent-field Raman spectroscopy, with an emphasis on achieving surface-enhanced Raman scattering (SERS) over the entire fiber length. Suspended-core PCF consisting of a silica core surrounded by three large air channels conjoined by a thin silica web is the most robust of the three SERS-active PCFs, with a demonstrated detection sensitivity of 1x10(-10) M R6G in an aqueous solution of only approximately 7.3 microL sampling volume.
Khaing Oo
Maung Kyaw
MK
1Department of Chemical Engineering and Materials Science, Stevens Institute of Technology,Hoboken, New Jersey 07030, USA.
Han
Yun
Y
Kanka
Jiri
J
Sukhishvili
Svetlana
S
Du
Henry
H
D000388:Air; D020342:Finite Element Analysis; D008855:Microscopy, Electron, Scanning; D017785:Photons; D012822:Silicon Dioxide / Q000737:chemistry; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013499:Surface Properties
D012822:Silicon Dioxide