Fabrication of photonic structures in crystals of the KTiOPO4 family by ultrafast laser ablation

We investigate the growth and fabrication of photonic structures by ultrafast laser ablation on nonlinear optical materials of the KTiOPO4 family. We studied how the ultrafast laser ablation process affected on the structure of the material by micro-Raman scattering and micro-X-ray diffraction. The modifications of the Raman frequencies and their intensities have been discussed and compared with those previously reported for unablated crystals.