Specific behavior of refractive indices in low-dose He+-implanted LiNbO3 waveguides
作者： S. M. Kostritskii , P. Moretti
DOI: 10.1063/1.2716377
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摘要: Y- or Z- cut LiNbO3 crystals were implanted at room temperature by helium with energy in the MeV range and various doses a specific care for 1010–1016ions∕cm2 range. The induced structure defects investigated micro-Raman IR reflectivity. Brewster angle technique was applied detailed measurements on both indices variations nuclear collision damaged areas. It is established that transition from point to extended occurs some threshold dose around 1.5×1015ions∕cm2 extraordinary index increased this threshold. A model based depolarized cluster formation proposed explain difference observed between changes of ordinary refractive indices.
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