Year: 2022

Our paper entitled “Dynamic Electrical Response of Vortex Polarization in (Pb_0.9Sr_0.1)TiO₃/SrTiO₃ Artificial Superlattice Thin Films” has been published in Appl. Phys. Lett. We found that the reorientation of dipole moments in the vortex domains is susceptible to the applied electric field pulses of 500 μs and is a reversible process. Although the centrosymmetric vortex domain structure is not considered to exhibit piezoelectricity, an evident change in the out-of-plane lattice constant with the applied electric field was revealed.

Citation: APL 121, 172904 (2022).

Our paper entitled “Strong Electro-optic Effect in Mg Incorporated ZnO Thin Films” has been published in Appl. Phys. Lett. We found that the Mg incorporation enhances the linear EO response significantly. In particular, the Zn_0.72Mg_0.28O thin film showed an effective EO coefficient of 7.6 pm/V, which is over three times larger than the reported values for ZnO-based thin films and over twice larger than that of ZnO single crystals. This study is the collaborative research with Dr. Meng of Institute of Semiconductors, Chinese Academy of Sciences.

Citation: APL 121, 152903 (2022).

Our paper entitled “Effect of Ni Doping on the Electro-optic Property in K(Ta_0.6Nb_0.4)O₃ Films” has been published in Jpn. J. Appl. Phys. We found that a larger withstand electric field was achieved by Ni doping, therefore, the variation of refractive index by the applicable maximum electric field was increased.

Citation: JJAP 61, SN1005 (2022).

Our paper entitled “Optimizing the Growth of K(Ta_0.6Nb_0.4)O₃ Films using Pulsed Laser Deposition and their Electro-optic Property” has been published in J. Ceram. Soc. Jpn. We revealed that the optimized KTN film showed the maximum EO coefficient r_c of 42 pm/V, which is larger than the previously reported value for KTN thin films having the same composition.

Citation: JCSJ 130, 424 (2022).