Electro-optic properties of relaxor ferroelectric 0.24PIN-0.43PMN-0.33PT monoclinic single crystal

The linear electro-optic properties of relaxor ferroelectric crystal 0.24PIN-0.43PMN-0.33PT in the monoclinic phase poled along the [011]_c direction were investigated at room temperature using the 632.8 nm He-Ne laser. The linear electro-optic coefficients (i.e., γ₁₃=-21.8 pm/V, γ₂₃=64.7 pm/V, and γ₃₃=85.8 pm/V) were determined by a modified Mach-Zehnder interferometer method. The effective electro-optic coefficient (i.e., γ_c=107.6 pm/V) was also calculated. The experimental result shows that the [011]_c poled single crystal has the higher electro-optic coefficients (i.e., γ₂₃ and γ₃₃), which can be used in the actual electro-optical device applications under the condition of excellent light transmittance.