Abstract

With a characteristic broad transmission range from ultraviolet to infrared, tetragonal γ-LiAlO2 crystal has promising advantages in optical applications. In this paper, we applied z-cut and x-cut γ-LiAlO2 single crystals to fabricate planar optical waveguides through 6.0 MeV C ions implantation. Waveguides of typical barrier type and well + barrier type were formed at fluences from 5 $\times \,\text{10}^{14}\,{\text{to}}\,\text{1}\,\times \,\text{{10}}^{15}\,{\text{ions/cm}}^{2}$ and of 3 $\times \,\text{10}^{15}\,{\text{ions/cm}}^{2}$ , respectively. Light at 633 nm was easily coupled out of the end-face of the formed waveguides, and excited monomode and two modes in the barrier type and the well + barrier type, respectively. Light at 1539 nm could be propagated in well + barrier type waveguides. The implantation changed the absorption of γ-LiAlO2 in ultraviolet band.

© 2016 IEEE

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