title: Surface-enhanced Raman-scattering fiber probe fabricated by femtosecond laser.
abstract: We report what we believe to be a new method to fabricate surface enhanced Raman scattering (SERS) fiber probe by direct femtosecond laser micromachining. Direct femtosecond laser ablations resulted in nanostructures on the cleaved endface of a multimode optical fiber with a 105/125 microm core/cladding diameter. The laser-ablated fiber endface was SERS activated by silver chemical plating. High-quality SERS signal was detected using Rhodamine 6G molecules (10(-8)-10(-6) M solutions) via back excitation with the fiber length of up to 1 m. The fiber SERS probe was compared with a planar fused silica substrate at a front excitation. The long lead-in fiber length and the backexcitation/collection setup make the SERS probe promising for remote sensing applications.
authors: Department of Electrical and Computer Engineering, Missouri University of Science and Technology, 1870 Miner Circle, Rolla, Missouri 65409, USA.
authors: Xinwei
authors: X
authors: Lan
authors: Yukun
authors: Y
authors: Han
authors: Tao
authors: T
authors: Wei
authors: Yinan
authors: Y
authors: Zhang
authors: Lan
authors: L
authors: Jiang
authors: Hai-Lung
authors: HL
authors: Tsai
authors: Hai
authors: H
authors: Xiao