Large Electro‐Optic Effect in La‐Doped 0.75Pb(Mg_1/3Nb_2/3)O₃–0.25PbTiO₃ Transparent Ceramic by Two‐Stage Sintering

Abstract

Highly transparent ceramics of La‐doped 0.75Pb(Mg1/3Nb2/3)O3–0.25PbTiO3 were fabricated by a two‐stage sintering method from conventional raw materials. The ceramics exhibited a transparency as high as 65% for the infrared wavelength. Large quadratic electro‐optic coefficient of 66 × 10−16 (m/v)2 was obtained, which was the highest value reported so far in Pb(Mg1/3Nb2/3)O3–PbTiO3 ceramics. The ferroelectric phase inducing the threshold electric field Eth and the domain structure of the transparent ceramics were studied.

Electric Field‐Induced Light Scattering in Eu‐Doped PMN‐PT Transparent Ceramics

“…Furthermore, research about Eu‐doped transparent ceramics could be helpful in the search of new host materials with good chemical stability and high damage threshold for Eu 3+ since similar studies about Er‐doped 0.75PMN‐0.25PT ceramics has been conducted . Therefore, in this work, Eu‐doped 0.75PMN‐0.25PT transparent ceramics with different Eu concentrations were obtained by a two‐stage sintering method . The microstructure and variation of transmittance under electric field of Eu‐doped PMN‐PT transparent ceramics were studied and discussed.…”

“…Jiang et al reported a higher quadratic EO coefficient of R = 28 × 10 −16 (m/v) 2 in PMN‐PT systems . Ruan et al fabricated La‐doped 0.75PMN‐0.25PT transparent ceramics with a quadratic EO coefficient as high as R = 66 × 10 −16 (m/v) 2 and such giant electro–optic effect was believed to originate from the unstable ferroelectric state which would undergo field‐induced phase transition . Though La as a rare‐earth(RE) element has proved to be able to improve the transparency and EO performance of PMN‐PT transparent ceramics significantly, the detailed mechanism are still far from clear.…”

Effects of PMN/PT ratio on optical and electro-optic properties of PLMNT transparent ceramics

“…5(A) shows the transmittance spectra of PLMNT transparent ceramics with the various PMN/PT ratios at different La contents. For the transparent materials, the theoretical transmittance T n should be described by the following equations [2]:…”

“…Electro-optic (EO) effect, i.e., the birefringence variation caused by an externally applied electric field, has potential applications in optical devices [1][2][3][4][5][6][7][8][9][10][11][12]. As EO benchmark materials, LiNbO 3 single crystals have been widely used in the field of current telecommunication.…”

“…Due to low EO coefficient and high driving voltage, applications in low-voltage-driving optical devices have been dramatically limited. However, the EO transparent ceramics present a promising application in the low-voltage-driving optical system because of their remarkable EO effect with low half-wave voltage and high optical transparency [1][2][3][4][5][6].…”