Femtosecond Generation of Nano-Fibers

Characteristics of supercontinuum generation in tapered fibers using femtosecond laser pulses

Drawing single mode fibers over a flame generates tapered fibers with waist diameters of approximately 1–3 micrometers and waist lengths of up to 90 mm. We demonstrate how the profile of such tapered fibers can be determined. We then characterize the white light that is generated in a variety of such fibers, showing its dependence on waist length and waist diameter and demonstrating its depende...

Generation, characterization, and application of broadband coherent femtosecond visible pulses in dispersion micromanaged holey fibers

Submillimeter-scale dispersion micromanagement (DMM) is discussed and used to generate coherent and stable femtosecond visible pulses (bandwidth up to 50 nm and scalable center wavelength in the range of 385–625 nm) in tapered holey fibers as short as 10 mm. The longitudinal variation of the phase-matching conditions for Cherenkov radiation and four-wave mixing explains the results well. We com...

Aligned Layers of Silver Nano-Fibers

We describe a new dichroic polarizers made by ordering silver nano-fibers to aligned layers. The aligned layers consist of nano-fibers and self-assembled molecular aggregates of lyotropic liquid crystals. Unidirectional alignment of the layers is achieved by means of mechanical shearing. Aligned layers of silver nano-fibers are partially transparent to a linearly polarized electromagnetic radia...

Green Barrier Materials from Cellulose Nano Fibers

In this study we prepared high grammage, robust, and structurally dense CNF (Cellulose nano fibrils) films with and without wet strength crosslinker KymeneTM (PAE, a polyamide-epichlorohydrin resin). Both selfcrosslink of PAE network and hetero crosslink between cellulose and PAE were formed at elevated temperature. Besides expected wet strength improvement, we also discovered unique stress-str...

Survey on Nano-fibers from Acetobacter Xylinum