La-doped PMN-PT transparent ceramics with ultra-high electro-optic effect and its application in optical devices  

作　　者：Ming Hu Zhongcan Chang Nan Nie Zhujun Wan Wen Dong Qiuyun Fu 

机构地区：[1]School of Integrated Circuits,Wuhan National Laboratory for Optoelectronics&Optical Valley Laboratory,Huazhong University of Science and Technology,Wuhan 430074,China [2]Research Institute of Huazhong University of Science and Technology in Shenzhen,Shenzhen 518000,China [3]National Engineering Research Center of Next Generation Internet Access-system,Wuhan 430074,China

出　　处：《Journal of Advanced Ceramics》2023年第7期1441-1453,共13页先进陶瓷（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant No.61971459);the Fund from Science,Technology and Innovation Commission of Shenzhen Municipality(Grant No.JCYJ2019080909-5009521);the Innovation Team Program of Hubei Province,China(Grant No.2019CFA004);the Innovation Fund of Wuhan National Laboratory for Optoelectronics&Optical Valley Laboratory(WNLO);2022 Shenzhen Central Leading Local Science and Technology Development Special Funding Program Virtual University Park Laboratory Project.

摘　　要：Transparent electro-optic(EO)ceramics of La-doped 0.75Pb(Mg_(1/3)Nb_(2/3))O_(3)-0.25PbTiO_(3)(0.75PMN-0.25PT)were prepared successfully.High transparency of 69%in the near-infrared(IR)wavelength(1550 nm)was achieved at 2 mo1%La doping,meanwhile it shows an extremely high quadratic EO coeficient of 45.4×10^(-16)m^(2)·V^(-2),which s indispensable for applications in EO devices.The distribution of a polar nanodomain structure of the samples experiences disorder-order-disorder evolution in a La doping range.It is found that a parallelly-stacked polar nanodomain structure with an easier and faster polarization switching in the 2 mol%La-doped sample suggests that an ordering distribution of polar nanoregions would be critical to inducing large EO effect,transparency,and piezoelectric response.A triple-cavity tunable optical filter(TOF)with a single transmission peak and a tuning voltage below 30 V in a tuning range of 190-197 THz was designed based on our ceramics.The work is believed to bridge the relationship among doping-engineering,EO properties,and polarization behavior,which would guide the further optimization of transparent EO ceramics.

关 键 词：Pb(Mg_(1/3)Nb_(2/3))O_(3)-PbTiO_(3)(PMN-PT)electro-optic(EO)ceramics TRANSMITTANCE domain reversal polarization tunable optical filter(TOF) 

分 类 号：TQ174.758.23[化学工程—陶瓷工业]