Generation of isolated attosecond pulses in bowtie-shaped nanostructure with three-color spatially inhomogeneous fields*
Xue Shan, Du Hong-Chuan†, Xia Yue, Hu Bi-Tao‡
       
The inhomogeneous field distribution for (a) g = 18 nm, (b) g = 16 nm, (c) g = 14 nm, and (d) g = 12 nm, where the triangle points are the raw data (black triangle) obtained from the FDTD simulation and the red dash lines are curves of polynomial fitting.