| Summary: | 碩士 === 國立中央大學 === 光電科學研究所 === 100 === In this study, we analyze the interplay between the evanescence field distribution and the particle motion based on ion exchanged waveguide.
Theoretically, waveguides with various geometric parameters are simulated and the corresponding evanescent fields are mapped out to understand the propagation characteristics.
Experimentally, ion exchanged waveguides are fabricated, and optical measurements are carried out which determines the propagation loss and the mode distribution within the waveguide. The evanescent waves on waveguide surface are then measured by scanning near-field optical microscope(SNOM). Finally, the propellation of gold nanoparticles by the evanescent field was demonstrated. The velocity is estimated to be 317.94 μm/sec, which is three times larger than that predicted by theory. We attribute this result to the aggregation of Au nano particles which effectively enlarge the particle size.
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