Shi Yuxiu, Xu Peipeng, Shen Xiang, Dai Shixun, Nie Qiuhua
Appl Opt. 2016 Feb 10;55(5):1017-21. doi: 10.1364/AO.55.001017.
Two types of reverse pillar integrated chalcogenide glass (As₂S₃) waveguides are proposed in this study. These geometries exhibit an ultraflat and low dispersion profile with four zero dispersion wavelengths. Its low dispersion is approximately ±10 ps/nm/km over a 2240 nm bandwidth (for L waveguide) and ±13 ps/nm/km over a 2030 nm bandwidth (for F waveguide). Waveguide dispersion engineering is achieved by tuning the structural parameters of the waveguide, which has less sensitivity to the variations of structural parameters compared with silicon pillar waveguides. Moreover, the nonlinear coefficient and phase-matching condition in four-wave mixing (FWM) showed a great potential for broadband FWM processes in the near- and middle-infrared regions.
本研究提出了两种类型的反向柱集成硫系玻璃（As₂S₃）波导。这些几何结构呈现出具有四个零色散波长的超平坦和低色散分布。其低色散在2240 nm带宽内约为±10 ps/nm/km（对于L波导），在2030 nm带宽内约为±13 ps/nm/km（对于F波导）。通过调整波导的结构参数实现波导色散工程，与硅柱波导相比，其对结构参数变化的敏感度较低。此外，四波混频（FWM）中的非线性系数和相位匹配条件在近红外和中红外区域的宽带FWM过程中显示出巨大潜力。
