Linear electro-optic properties of orthorhombic PZN-8%PT single crystal

The optical transmittance spectra of relaxor ferroelectric 0.92Pb(Zn_1/3Nb_2/3)O₃-0.08PbTiO₃ (PZN-8%PT) single crystals poled along different directions have been systematically studied at room temperature. After being poled along the [011] direction, the transmittance of induced orthorhombic PZN-8%PT single crystal is more than 50% from 0.5 to 5.7 μm, which is much higher than that poled along the [001] and [111] directions. The refractive indices and linear electro-optic properties of the orthorhombic PZN-8%PT single crystal were characterized at a wavelength of 632.8 nm. Large electro-optic responses were observed, _γ33 = 220 pm/V, _γ13 = 62 pm/V, and _γ23 = 23 pm/V. Thus, orthorhombic PZN-8%PT single crystal is a promising material for high-performance electro-optic devices.