Surface plasmon polariton excitation was demonstrated by fluorescent light from organic para-hexaphenylene (p-6P) nanofibers grown directly on a silver thin film surface. We show results of both photoluminescence lifetime measurements and angle-resolved leakage radiation spectroscopy in the excitation range 420–620 nm, which corresponds to the material photoluminescence band. The optical characteristics of randomly oriented p-6P nanofibers assembled directly on the metal surface are remarkably comparable to those of fibers grown on crystalline substrate surfaces. In addition, compared to mica-transferred fibers, the photoluminescence lifetime is longer. More importantly, they show polarization-insensitive plasmonic activity and are entirely consistent with theoretical predictions. Both analytical and numerical finite-difference time-domain simulations support the experimental data. Our findings open a new avenue for incorporating organic nanofibers into optoelectronic applications by directly depositing the p-6P material onto selected substrates. This direct deposition significantly reduces the deformation of the fiber structure and the impurity introduction, usually implied by the transfer process.
Bibliographical noteFunding Information:
Financial funding for this work was provided by the Fabrikant Mads Clausen’s Foundation . We are grateful to Till Leissner for fruitful discussions during analyzing experimental and numerical data.
Financial funding for this work was provided by the Fabrikant Mads Clausen's Foundation. We are grateful to Till Leissner for fruitful discussions during analyzing experimental and numerical data.
© 2022 The Author(s)
- Leakage radiation spectroscopy
- Organic nanofibers
- Para-hexaphenylene (p-6P)
- Surface plasmon polaritons
- Surface plasmon-coupled emission