title: Sum frequency generation in pure zinc-blende GaAs nanowires.
abstract: Nonlinearity of semiconductor nanowires makes them potential frequency converters in nanoscale optoelectronics. Here we demonstrate that sum frequency generation signals can be acquired from GaAs nanowires when excited by a femtosecond laser at 1048 nm and a tunable optical parametric oscillator ranging from 1416 nm to 1770 nm. The SFG intensity is insensitive to the polarization but quite sensitive to the temporal overlap of incident lasers pulses. It is shown that they can work for pulse-width measurement of femtosecond lasers in the near infrared band. Our results suggest GaAs NWs to be excellent optical nonlinear mixers in nanoscale optoelectronics.
authors: Xiaoqing
authors: X
authors: Zhang
authors: Hao
authors: H
authors: He
authors: Jintao
authors: J
authors: Fan
authors: Chenglin
authors: C
authors: Gu
authors: Xin
authors: X
authors: Yan
authors: Minglie
authors: M
authors: Hu
authors: Xia
authors: X
authors: Zhang
authors: Xiaomin
authors: X
authors: Ren
authors: Chingyue
authors: C
authors: Wang