DEVELOPMENT OF LIQUID/LIQUID OPTICAL WAVEGUIDE USING A TWO PHASE SHEATH FLOW AND ITS APPLICATION TO FLUORESCENT DETERMINATION OF RHODAMINE B

摘要

Proposed was the use of a sheath flow as a liquid/liquid optical waveguide, in which the inner flow works as core and the outer flow as clad. Firstly, the conditions to obtain a stable liquid/liquid optical waveguide were investigated: the stable waveguide was constructed with using toluene, diethyl eter and THF as an inner phase, which are miscible or immiscible with water. Furthermore, fluorescence spectra of rhodamine B excited by evanescent wave at the liquid/liquid interface of the waveguide were obtained and the effect of solvents on the fluorescent spectra was discussed.