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Second harmonic and raman imaging of He+ implanted KTiOPO4 waveguides
Ningning Dong1, Daniel Jaque, Feng Chen
1School of Physics, Key Laboratory of Particle Physics and Particle Irradiation, MOE, and State Key Laboratory of Crystal Materials, Shandong University, 250100 Jinan, China.
Abstract:
We report on the micro second harmonic (µ-SH) and micro Raman (µ-Raman) images of ion implanted channel and planar waveguides in KTiOPO4 (KTP) crystals. The μ-SH images reveal that the nonlinear properties in the waveguides have not been deteriorated during the implantation process. This is consistent with the μ-Raman images that evidences that lattice distortions are minimal at waveguide's volume. Both the structural and nonlinear properties of the KTP lattice have been only modified at the end of ions' trajectory, which is in good agreement with the positions with maximum refractive index changes.
