Optical properties and dispersions of rhombohedral 0.24Pb(In_1/2Nb_1/2)O₃-0.49Pb(Mg_1/3Nb_2/3)O₃-0.27PbTiO₃ single domain single crystal

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• 作者：Fengmin Wu ; Bin Yang ; Enwei Sun ; Wenlong Yang ; Wenwu Cao
• 关键词：PIN&ndash ; PMN&ndash ; PT ; Bandgap ; Refractive index ; Optical dispersion
• 刊名：Optical Materials
• 出版年：December, 2013
• 年：2013
• 卷：36
• 期：2
• 页码：342-345
• 全文大小：756 K

文摘

The ternary relaxor-based ferroelectric single crystal 0.24Pb(In_1/2Nb_1/2)O₃-0.49Pb(Mg_1/3Nb_2/3)O₃-0.27PbTiO₃ (0.24PIN-0.49PMN-0.27PT) poled along [1 1 1]_c has remarkable optical properties. Its Curie temperature T_c is 168 掳C determined by the dielectric constant measurement. Optical transmission spectra were recorded at both room temperature and 200 掳C. The optical absorption edge at 200 掳C has an obvious red-shift compared with that at room temperature, the bandgaps were determined to be E_g = 3.18 eV and 2.95 eV at room temperature and at 200 掳C, respectively. Parameters for the Varshini equations are: E_g(0) = 3.27 eV, a = 1.62 脳 10^鈭? meV/K and b = 1315 K. We have obtained the refractive indices and the extinction coefficients in the single-domain state. The parameters of room temperature monomial Sellmeier oscillator were also derived.