Our paper entitled “Revealing Intrinsic Electro-optic Effect in Single Domain Pb(Zr, Ti)O3 Thin Films” has been published in Appl. Phys. Lett. We revealed the intrinsic EO effect in PZT using the single domain films grown on CaF2 substrates. Our finding shows that the intrinsic EO effect is enhanced in PZT, which is similar to the enhancement seen in the dielectric and piezoelectric constants. Moreover, it tells us that most of the reported EO response in PZT films is supported by additional extrinsic contributions.
Our paper entitled “Influence of Orientation on the Electro-optic Effect in Epitaxial Y-doped HfO2 Ferroelectric Thin Films” has been published in Jpn. J. Appl. Phys. We found that the (111)-Y-HfO2 film showed a larger EO response than that of the (100)-Y-HfO2 film, which is reasonable considering the difference in remnant polarization between the (100)- and (111)-Y-HfO2 films.
Our paper entitled “Linear Electro-optic Effect in Ferroelectric HfO2-based Epitaxial Thin Films” has been published in Jpn. J. Appl. Phys. Rapid Communication. We found that the Y-HfO2 film showed a linear EO response, owing to its ferroelectricity. The observed results indicate that ferroelectric HfO2-based films are viable candidates for CMOS-compatible EO devices.