The interplay of space and time symmetries, ferroic properties, chirality and notions of
reciprocity determines many of the technologically important properties of materials such as …

This article summarizes the results of the investigations of the dynamics of ferroelectric (FE)
phase transitions (PTs) obtained in Prague during the last 25 years. After a short …

Multiferroics, where multiple ferroic orders coexist and are intimately coupled, promise novel
applications in conceptually new devices on one hand, and on the other hand provide …

Terahertz isolators, one of the typical nonreciprocal devices that can break Lorentz
reciprocity, are indispensable building blocks in terahertz systems for their critical …

Isolators, or optical diodes, are devices enabling unidirectional light propagation by using
non-reciprocal optical materials, namely materials able to break Lorentz reciprocity. The …

Circularly polarized light with spin angular momentum is one of the most valuable probes of
magnetism. We demonstrate that light beams with orbital angular momentum (OAM), or …

We present a terahertz spectroscopic study of polar ferrimagnet FeZnMo 3 O 8. Our main
finding is a giant high-temperature optical diode effect, or nonreciprocal directional …

Two‐dimensional organic–inorganic hybrid perovskites (2D‐OIHPs) are attracting interest
due to their structural tunability and rich functional characteristics, such as ferroelectricity …

We experimentally demonstrate one-way transparency of light in multiferroic CuB 2 O 4. The
material is rendered transparent for light propagating in one direction, while opaque for light …

We report large nonreciprocal optical absorption at shortwave infrared (SWIR) wavelengths
in the magnetoelectric (ME) antiferromagnet (AFM) LiNiPO 4. The difference in absorption …