Fiber optic chip for fully-guided Raman iterrogation of molecular adsorbates.

Raman spectroscopy;SERS sensors;Functionalized fiber-optic probe;Fiber-optic chip;Near field optics;Remote Raman scattering detection

Jennifer Burnett

University:University of Louisville

Department:Physics and Astronomy

关键词: Raman spectroscopy;    SERS sensors;    Functionalized fiber-optic probe;    Fiber-optic chip;    Near field optics;    Remote Raman scattering detection;   

Others  :  https://ir.library.louisville.edu/cgi/viewcontent.cgi?article=1179&context=etd

美国|英语

来源: The Universite of Louisville's Institutional Repository

【 摘 要 】

Planar fiber-optic chips (FOC) take advantage of the evanescent field effects of side-polished fibers, exhibiting usefulness in fluorescence, absorbance, electrochemical investigations, and as presented here Raman spectroscopy. The fabrication of the FOC utilizes a side-polishing process of a multi-mode optical fiber. The fiber core is exposed creating a D-shape when viewed laterally. The cylindrical fiber is mounted in a V-groove of a Si-wafer and side-polished, creating a platform for easier analyte handling with greater control over surface chemistry. A longer path length when compared with end-tip fiber probes results in a larger cross section of analyte signal. This work presents decoupled investigations of excitation and collection of Raman scattering using the FOC, for bulk media and thin films. Realization of a fully in-line system would alleviate the need for alignment of cumbersome bench-top optics, further increasing the utility of this device by allowing for interrogation of remote, hostile environments.