Interplay of Stimulated Emission and Fluorescence Resonance Energy Transfer in Electrospun Light-Emitting Fibers

摘要

Concomitant amplified spontaneous emission (ASE) and F\"orster resonanceenergy transfer (FRET) are investigated in electrospun light-emitting fibers.Upon dye-doping with a proper FRET couple system, free-standing fibrous matsexhibit tunable FRET efficiency and, more importantly, tailorable thresholdconditions for stimulated emission. In addition, effective scattering of lightis found in the fibrous material by measuring the transport mean free path ofphotons by coherent backscattering experiments. The interplay of ASE and FRETleads to high control in designing optical properties from electrospun fibers,including the occurrence of simultaneous stimulated emission from both donorand acceptor components. All tunable-optical properties are highly interestingin view of applying electrospun light-emitting materials in lightening,display, and sensing technologies.