Potassium titanyl phosphate (${\mathrm{KTiOPO}}_4$ or KTP) is a quadriatomic material made of O, P, K, and Ti which crystallizes in an orthorhombic structure with space group Pna2. The virgin KTP at different axial orientation, 〈100〉, 〈001〉, and 〈010〉, has been investigated by the channeling technique. The obtained corresponding minimum yields are 3.8, 4, and 11 %, respectively. Damage in KTP was created by 200 and 400 keV He-, Xe-, and Hg-ion irradiations with the dose varying from 1×${10}^{13}$ to 1×${10}^{16}$ ions/${\mathrm{cm}}^2$. The effect of ion mass, energy, dose, annealing temperature, and orientation of KTP on the damage has been studied. The number of displaced atoms, the damage peak, and damage width are extracted from the experimental data. The numbers of the displaced atoms obtained are compared with the trim code (the transport of ions in the matters). The result shows that the experimental numbers of the displaced atoms are in agreement with theoretical ones predicted by the trim code within the order of the magnitude. Also for the case of He ion implanted in KTP to a dose of 1×${10}^{16}$ ions/${\mathrm{cm}}^2$, the recovery of the crystallinity of the KTP is observed after 800 °C annealing.

• Received 15 March 1994

DOI:https://doi.org/10.1103/PhysRevB.50.770