Abstract
We report a systematic study of the dependence of the output efficiency and scattering efficiency on crossing angle, guided wavelength, and junction size in polymer nanofiber waveguide junctions. The junctions were assembled by using poly(trimethylene terephthalate) nanofibers (PNFs) with diameters of 200–800 nm under an optical microscope with the assistant of micromanipulators. A Chinese character and an SU pattern based the PNF junction technique have been demonstrated, moreover, the junction technique has also been expanded to various elastic substrates instead of glass substrate with high robustness. To further demonstrate the ability of modulating light of using the junction technique, we fabricated rugby-shaped microresonators based on the polymer fiber junction, which exhibited high Q factor up to 105. Furthermore, the microresonators can incorporate dyes or quantum dots into them, acting as active devices. We believe that the polymer fiber junction technique would provide a versatile platform for investigating light modulation or light matter interaction in various cavities with different configuration. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2015, 53, 833–840
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