Graphene-doped polymer nanofibers are fabricated by taper drawing of solvated polyvinyl alcohol doped with liquid-phase exfoliated graphene flakes.Nanofibers drawn this way typically have diameters measured in hundred...Graphene-doped polymer nanofibers are fabricated by taper drawing of solvated polyvinyl alcohol doped with liquid-phase exfoliated graphene flakes.Nanofibers drawn this way typically have diameters measured in hundreds of nanometers and lengths in tens of millimeters;they show excellent uniformity and surface smoothness for optical waveguiding.Owing to their tightly confined waveguiding behavior,light–matter interaction in these subwavelength-diameter nanofibers is significantly enhanced.Using approximately 1350-nm-wavelength femto-second pulses,we demonstrate saturable absorption behavior in these nanofibers with a saturation threshold down to 0.25 pJ pulse^(-1)(peak power,1.3 W).Additionally,using 1064-nm-wavelength nanosecond pulses as switching light,we show all-optical modulation of a 1550-nm-wavelength signal light guided along a single nanofiber with a switching peak power of,3.2 W.展开更多
基金This work was supported by the National Natural Science Foundation of China(61475140)the National Basic Research Program of China(2013CB328703 and 2012CB921400)Y.Ron.Shen was supported by the Director,Office of Science,Office of Basic Energy Sciences,Materials Sciences and Engineering Division,of the U.S.Department of Energy(DEAC03-76SF00098).
文摘Graphene-doped polymer nanofibers are fabricated by taper drawing of solvated polyvinyl alcohol doped with liquid-phase exfoliated graphene flakes.Nanofibers drawn this way typically have diameters measured in hundreds of nanometers and lengths in tens of millimeters;they show excellent uniformity and surface smoothness for optical waveguiding.Owing to their tightly confined waveguiding behavior,light–matter interaction in these subwavelength-diameter nanofibers is significantly enhanced.Using approximately 1350-nm-wavelength femto-second pulses,we demonstrate saturable absorption behavior in these nanofibers with a saturation threshold down to 0.25 pJ pulse^(-1)(peak power,1.3 W).Additionally,using 1064-nm-wavelength nanosecond pulses as switching light,we show all-optical modulation of a 1550-nm-wavelength signal light guided along a single nanofiber with a switching peak power of,3.2 W.
