title: Single nanowire optical correlator.
abstract: Integration of miniaturized elements has been a major driving force behind modern photonics. Nanowires have emerged as potential building blocks for compact photonic circuits and devices in nanophotonics. We demonstrate here a single nanowire optical correlator (SNOC) for ultrafast pulse characterization based on imaging of the second harmonic (SH) generated from a cadmium sulfide (CdS) nanowire by counterpropagating guided pulses. The SH spatial image can be readily converted to the temporal profile of the pulses, and only an overall pulse energy of 8 μJ is needed to acquire a clear image of 200 fs pulses. Such a correlator should be easily incorporated into a photonic circuit for future use of on-chip ultrafast optical technology.
authors.affiliation: State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University , Hangzhou 310027, China.
authors.forename: Huakang
authors.initials: H
authors.lastname: Yu
authors.forename: Wei
authors.initials: W
authors.lastname: Fang
authors.forename: Xiaoqin
authors.initials: X
authors.lastname: Wu
authors.forename: Xing
authors.initials: X
authors.lastname: Lin
authors.forename: Limin
authors.initials: L
authors.lastname: Tong
authors.forename: Weitao
authors.initials: W
authors.lastname: Liu
authors.forename: Aimin
authors.initials: A
authors.lastname: Wang
authors.forename: Y Ron
authors.initials: YR
authors.lastname: Shen