摘要
准同型相界附近的弛豫铁电单晶体具有较大的压电效应,因而得到了广泛地研究。一般而言,具有较大铁弹响应的材料也具有较高的声光效应。尤其是大的晶格参数变化和应力所致相变可以同时产生大的折射率变化,二者可以同时提高声光效应。本文在马赫-曾德尔干涉光路中对晶体样品施加单轴应力,测量得到了0.65Pb(Mg1/3Nb2/3)O3-0.35PbTiO3(0.65PMN-0.35PT)单晶的声光系数π。研究结果表明,该单晶表现出了极高的声光系数,例如,π33达到了15.2×10^-12 m^2/N。这些研究结果表明,弛豫铁电单晶是激光束偏转器和声光调制器的优选材料。
Relaxor ferroelectric single crystals were intensively investigated due to large piezoelectric effects near the morphotropic phase boundary(MPB).In general,materials with large ferroelastic responses may also have high acousto-optic effects.Especially,both large lattice parameter changes and stress induced phase transition can bring large refractive index changes,which enhances the overall acousto-optic effects.The acousto-optic coefficientsπwere characterized for 0.65 Pb(Mg1/3Nb2/3)O3-0.35 PbTiO3(0.65 PMN-0.35 PT)single crystal under uniaxial stress using Mach-Zender interferometer method.The results show that the crystal exhibits very high acousto-optic values,for example,π33 can reach 15.2×10^-12 m^2/N,indicating that relaxor ferroelectric single crystals are promising candidates for laser deflectors or acousto-optic modulators.
作者
陈慧挺
赫崇君
李自强
高慧芳
冒蓉
朱俊
CHEN Huiting;HE Chongjun;LI Ziqiang;GAO Huifang;MAO Rong;ZHU Jun(School of Optoelectronic and Information Technology,Zhongshan Torch Polytechnic,Zhongshan 528436,China;Key Laboratory of Space Photoelectric Detection and Perception,Ministry of Industry and Information Technology,Academy of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Jiangsu Aidi Electromechanical Equipment Industry Co.,Ltd,Nanjing 211101,China;The 55th Research Institute of CETC,Nanjing 210016,China;Northern Information Control Group Ltd.,Nanjing 211153,China)
出处
《人工晶体学报》
EI
CAS
北大核心
2020年第4期587-591,612,共6页
Journal of Synthetic Crystals
基金
国家自然科学基金(61675095)
广东省普通高校特色创新项目(2018GKTSCX046)
中山市科技计划项目(2018B125)。
