Author/Authors :
Li، نويسنده , , Xiaochun and Kong، نويسنده , , Yongfa and Liu، نويسنده , , Hongde and Sun، نويسنده , , Lei and Xu، نويسنده , , Jingjun and Chen، نويسنده , , Shaolin and Zhang، نويسنده , , Ling and Huang، نويسنده , , Ziheng and Liu، نويسنده , , Shiguo and Zhang، نويسنده , , Guangyin، نويسنده ,
Abstract :
The ultraviolet absorption edges of LiNbO3 crystals with different Li2O contents and MgO doping concentrations were investigated. The generally defined absorption edges at absorption coefficient α = 15 or 20 cm−1 of all these crystals fit the Urbach rule perfectly. The origin of this absorption edges in non-stoichiometric LiNbO3 crystals is attributed to the presence of Li vacancies.
