Zhang Yuchao, Liu Hongjun, Sun Qibing, Huang Nan, Wang Zhaolu
Appl Opt. 2015 May 20;54(15):4850-6. doi: 10.1364/AO.54.004850.
A strip/slot hybrid waveguide with double horizontal silicon nanocrystals slots is proposed to achieve flat and low dispersion with four zero dispersion wavelengths. By tuning structural parameters of the waveguide, dispersion tailoring is fully characterized. The flat dispersion varying between -13 and 14 ps/(nm·km) is obtained over an 845 nm bandwidth. A broadband supercontinuum spectrum, spanning from 1.15 to 3.65 μm in the -15 dB level, was generated in this waveguide pumped by a femtosecond pulse at 1.86 μm. Results indicate that the waveguide has great potential in near- and mid-infrared nonlinear applications.
提出了一种具有双水平硅纳米晶体狭缝的条形/狭缝混合波导，以实现具有四个零色散波长的平坦低色散。通过调整波导的结构参数，对色散定制进行了全面表征。在845nm带宽上获得了-13至14 ps/(nm·km)之间变化的平坦色散。在该波导中，由1.86μm的飞秒脉冲泵浦，产生了-15 dB水平下从1.15至3.65μm的宽带超连续谱。结果表明，该波导在近红外和中红外非线性应用中具有巨大潜力。
