As 10 Gbit/s long-distance optical communication systems become more and more pervasive, requirements rise relating to increased levels of performance, as well as the miniaturization of key devices that configure such systems. Lithium niobate (LN) modulators are used primarily as optical modulators that change high-speed electrical signals at 10 Gbit/s to optical signals for long-distance commu...

Although lead-free piezoelectric ceramics have been extensively studied, many problems must still be overcome before they are suitable for practical use. One of the main problems is fabricating a multilayer structure, and one solution attracting growing interest is the use of lead-free multilayer piezoelectric ceramics. The paper reviews work that has been done by the authors on lead-free alkal...

Many applications of metasurfaces require an ability to dynamically change their properties in the time domain. Electrical tuning techniques are particular interest, since they pave a way on-chip integration with optoelectronic devices. In this work, we propose and experimentally demonstrate electro-optic lithium niobate (EO-LN) metasurface that shows dynamic modulations phase retardation trans...

The purpose of this note is to introduce the linear electro-optic effect (Pockels effect) and its applications for modulating the properties of a light wave, such as its phase, polarisation and intensity. For this purpose, basic electromagnetic theory is first reviewed. Some elements of light propagation in an anisotropic medium are then introduced. The linear electro-optic effect is then prese...

Intrinsic point defects in LiNbO3, i.e., isolated Nb antisites and Li as well Nb vacancies, are investigated from first-principles within the Slater-Janak transition state model. Thereby the electronic structure of the investigated defects is calculated with hybrid exchange-correlation functionals. This approach allows for the calculation of charge transition levels without comparing the total ...

The control of optical fields is usually achieved through the electro-optic or acousto-optic effect in single-crystal ferroelectric or polar compounds such as LiNbO3 or quartz. In recent years, tremendous progress has been made in ferroelectric oxide thin film technology-a field which is now a strong driving force in areas such as electronics, spintronics and photovoltaics. Here, we apply epita...