vi
Preface
occur in mesoscopic crystals with artificial patterned ferromagnetic structures and
also in atomic scale magnetic insulators with the kagome-lattice structures. Such
structures can topologically protect unidirectional surface spin waves inside spinwave band gaps. Chiral edge states arise due to broken time-reversal symmetry.
These are the “one-way waveguides” which allow energy to flow in one direction
only. In this book, the question of unidirectional propagation of energy of spin waves
is discussed in Chaps. 1 and 14. In Chap. 1, the authors consider unidirectional spin
waves generated by chiral spin pumping. In Chap. 14, the authors analyze unidirectional surfaces spin waves topologically protected by the band gap in the reciprocal
space.
One of the questions that the reader may have in these studies is that in the
case of unidirectional propagation of energy in structures with broken time-reversal
symmetry, certain constraints should be imposed due to a joint analysis of the
reciprocity and unitarity relations.
In chiral materials, magnetic moments (spins) can form various structures known
as spin textures. Chapter 14 is devoted to general consideration of such topological
spin textures. In Chap. 7, we have a good review on the mechanisms of manipulation
of magnetic textures via spin-transfer and spin–orbit-torques. In Chap. 8, the author
has presented the reader with recent theoretical studies on the microwave-induced
physical phenomena and device functions of magnetic skyrmions. It is demonstrated
that the spin-wave excitations give rise to translational motion of the skyrmions. New
aspects of topological dynamics of spin texture-based metamaterials are considered
in Chap. 15. In Chap. 16, the authors provide the reader with new studies on antiferromagnetic skyrmions and bimerons. These topological spin textures have attracted a
lot of attentions because they have small size and low depinning current. For creation
of new magnetic materials with specific engineered properties, a new field of research
based on Floquet engineering is presented in Chap. 11. It is shown that such basic
quantities of magnetic insulators as magnetization, spin chirality, and spin current can
be controlled by the Floquet technique. In Chap. 3, the authors discuss plasmon resonances of spin-polarized magnetic nanoparticles. Interesting results of this study may
raise the reader’s question: can the coupling between linear (plasmon) and angular
momenta (electron spin) cause the appearance of intrinsic chiral wavefunctions?
In the book, the chiral interaction between light and matter is considered in various
aspects of research, concerning both non-magnetic and magnetic chiral matter. A lot
of attention is paid to plasmonic chiral metasurfaces and superchiral optical nearfields for effective detection and differentiation of enantiomers. It is discussed that
chiral sensitive techniques can be used to probe the fundamental symmetries. In
Chap. 2, the authors demonstrate how surface plasmon resonance can be employed
as a new research tool for chiral sensing. The interactions of chirality of light and
plasmonic chiral metasurfaces are studied in Chap. 4. The author shows that the
phase and amplitude of the circularly polarized light can be effectively modulated
by optical chiral metasurfaces. In Chap. 5, the authors argue that the optical response
of matter manifests itself not only in the form of optical signals, but also in the form
of a mechanical force acting on the system of matter. Consequently, the plasmonic
near field with a nano-scale radius of rotation is intended to control the motion of
Preface
occur in mesoscopic crystals with artificial patterned ferromagnetic structures and
also in atomic scale magnetic insulators with the kagome-lattice structures. Such
structures can topologically protect unidirectional surface spin waves inside spinwave band gaps. Chiral edge states arise due to broken time-reversal symmetry.
These are the “one-way waveguides” which allow energy to flow in one direction
only. In this book, the question of unidirectional propagation of energy of spin waves
is discussed in Chaps. 1 and 14. In Chap. 1, the authors consider unidirectional spin
waves generated by chiral spin pumping. In Chap. 14, the authors analyze unidirectional surfaces spin waves topologically protected by the band gap in the reciprocal
space.
One of the questions that the reader may have in these studies is that in the
case of unidirectional propagation of energy in structures with broken time-reversal
symmetry, certain constraints should be imposed due to a joint analysis of the
reciprocity and unitarity relations.
In chiral materials, magnetic moments (spins) can form various structures known
as spin textures. Chapter 14 is devoted to general consideration of such topological
spin textures. In Chap. 7, we have a good review on the mechanisms of manipulation
of magnetic textures via spin-transfer and spin–orbit-torques. In Chap. 8, the author
has presented the reader with recent theoretical studies on the microwave-induced
physical phenomena and device functions of magnetic skyrmions. It is demonstrated
that the spin-wave excitations give rise to translational motion of the skyrmions. New
aspects of topological dynamics of spin texture-based metamaterials are considered
in Chap. 15. In Chap. 16, the authors provide the reader with new studies on antiferromagnetic skyrmions and bimerons. These topological spin textures have attracted a
lot of attentions because they have small size and low depinning current. For creation
of new magnetic materials with specific engineered properties, a new field of research
based on Floquet engineering is presented in Chap. 11. It is shown that such basic
quantities of magnetic insulators as magnetization, spin chirality, and spin current can
be controlled by the Floquet technique. In Chap. 3, the authors discuss plasmon resonances of spin-polarized magnetic nanoparticles. Interesting results of this study may
raise the reader’s question: can the coupling between linear (plasmon) and angular
momenta (electron spin) cause the appearance of intrinsic chiral wavefunctions?
In the book, the chiral interaction between light and matter is considered in various
aspects of research, concerning both non-magnetic and magnetic chiral matter. A lot
of attention is paid to plasmonic chiral metasurfaces and superchiral optical nearfields for effective detection and differentiation of enantiomers. It is discussed that
chiral sensitive techniques can be used to probe the fundamental symmetries. In
Chap. 2, the authors demonstrate how surface plasmon resonance can be employed
as a new research tool for chiral sensing. The interactions of chirality of light and
plasmonic chiral metasurfaces are studied in Chap. 4. The author shows that the
phase and amplitude of the circularly polarized light can be effectively modulated
by optical chiral metasurfaces. In Chap. 5, the authors argue that the optical response
of matter manifests itself not only in the form of optical signals, but also in the form
of a mechanical force acting on the system of matter. Consequently, the plasmonic
near field with a nano-scale radius of rotation is intended to control the motion of