Low-threshold supercontinuum generation in highly nonlinear chalcogenide nanowires.
We demonstrate low-threshold supercontinuum generated in a highly nonlinear arsenic selenide chalcogenide nanowire with tailored dispersion. The tapered submicrometer chalcogenide fiber exhibits an ultrahigh nonlinearity, n(2) approximately 1.1x10(-17) m(2)/W and an effective mode area of 0.48 mum(2), yielding an effective nonlinearity of gamma approximately 93.4 W/m, which is over 80,000 times larger than standard silica single-mode fiber at a wavelength of approximately 1550 nm. This high nonlinearity, in conjunction with the engineered anomalous dispersion, enables low-threshold soliton fission leading to large spectral broadening at a dramatically reduced peak power of several watts, corresponding to picojoule energy.
Yeom
Dong-Il
DI
ARC Centre for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), School of Physics, University of Sydney, NSW, Australia. yeom@physics.usyd.edu.au
Mägi
Eric C
EC
Lamont
Michael R E
MR
Roelens
Michaël A F
MA
Fu
Libin
L
Eggleton
Benjamin J
BJ