Propagation of broadband light pulses through LIPSS nanoripples fabricated on diamond

We study the propagation of coherent broadband light through laser induced periodic surface structures (LIPSS) fabricated in diamond, by comparing the performance of the laser generated nanostructures with sinusoidal ideal structures in the near-IR. The simulations were carried out for a variety of LIPSS morphologies, including nanostructure aspect ratio and the irregularities arising from the LIPSS technique. The results show that these irregularities produce substantial diffraction compared to the ideal structures, meaning that their use for some optical applications may be limited.