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Dal Negro, L. ; Zhu, Y. ; Chen, Y. ; Prado, M. ; Pinheiro, F. A. ( , Physical Review B)
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Britton, W. A. ; Chen, Y. ; Dal Negro, L. ( , Optical Materials Express)
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Zhang, R. ; Knitter, S. ; Liew, S. F. ; Omenetto, F. G. ; Reinhard, B. M. ; Cao, H. ; Dal Negro, L. ( , Applied Physics Letters)
We report on plasmon-enhanced random lasing in bio-compatible light emitting Hydroxypropyl Cellulose (HPC) nanofiber networks doped with gold nanoparticles. HPC nanofibers with a diameter of 260 ± 30 nm were synthesized by a one step, cost-effective and facile electrospinning technique from a solution-containing Rhodamine 6G and Au nanoparticles. Nanoparticles of controlled diameters from 10 nm to 80 nm were dispersed inside the nanofibers and optically characterized using photoluminescence, dark-field spectroscopy, and coherent backscattering measurements. Plasmon-enhanced random lasing was demonstrated with a lower threshold than that in dye-doped identical HPC networks without Au nanoparticles. These findings provide an effective approach for plasmon-enhanced random lasers based on a bio-compatible host matrix that is particularly attractive for biophotonic applications such as fluorescence sensing, optical tagging, and detection.
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Britton, W. A. ; Zhang, R. ; Shrestha, S. ; Chen, Y. ; Yu, N. ; Dal Negro, L. ( , Applied Physics Letters)