title: Ultrabroadband flat dispersion tailoring of dual-slot silicon waveguides.
abstract: We propose a new strip/slot hybrid waveguide with double slots, which exhibits a flat and low dispersion over a 1098-nm bandwidth with four zero-dispersion wavelengths. Dispersion of dual-slot silicon waveguide is mainly determined by mode transition from a strip mode to a slot mode rather than by material dispersion. Dispersion tailoring is investigated by tuning different structural parameters of waveguides. Moreover, nonlinear coefficient of dual-slot silicon waveguide and phase-matching condition in FWM are both explored in detail. The dual-slot waveguide can be used to generate supercontinuum with bandwidth extending up to 1630 nm pumped by femtosecond pulses. This waveguide will have a great potential for ultrabroadband signal processing applications from near-infrared region to mid-infrared region.
authors: State Key Laboratory of Transient Optics and Photonics Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an, 710119, China.
authors: Ming
authors: M
authors: Zhu
authors: Hongjun
authors: H
authors: Liu
authors: Xuefeng
authors: X
authors: Li
authors: Nan
authors: N
authors: Huang
authors: Qibing
authors: Q
authors: Sun
authors: Jin
authors: J
authors: Wen
authors: Zhaolu
authors: Z
authors: Wang