Preface
vii
the center of mass of nano-objects. They show that all the basic elements of motion
control of nano-objects can be realized using optical manipulation. Recent advancements in nano- and micro-fabrication technology have allowed the realization of
artificially structured materials with strong electromagnetic chirality, far-exceeding
natural chiral materials. Implementation of artificial chirality in micro-/nano-scale
three-dimensional plasmonic structures is the subject of Chap. 10. Chiroptical lightmatter interaction is largely boosted in the surroundings of complex-shaped metallic
nanostructures. Theoretical generalization of the optical chirality to the case of arbitrary dispersive and lossy optical media is a subject of studies of Chap. 13. In Chap. 9,
the authors are aimed to create the background for establishing a connection between
the optics of chiral metamaterials and magnonics. This is a challenging task. Using
formal similarity of the electromagnetic field and spin waves in an antiferromagnetic insulator, the authors discuss the possibility to generalize the notion of optical
chirality in antiferromagnets with broken chiral symmetry. Concerning the studies of
light-matter interaction, it is very important to note that when analyzing the interaction of chiral light with a helical wavefront (due to spin and orbital angular momenta)
with chiral nanostructures, it is necessary to keep in mind the effects of nonlocality.
The reader may find that simple models based on the dipole approximation are inapplicable when analyzing such nonlocal optical response effects. It is also worth noting
that while in optics, a possible way to detect the effect of material chirality is through
the transmission and reflection of polarized light, in microwaves, chirality parameters
are obtained via far-field measurement of the scattering-matrix characteristics.
Any coupling between the magnetic and the electric properties of a material is
denoted, in its most general form, as the magnetoelectric (ME) effect. The efficient
energy conversion from the electric to the magnetic domain and vice versa still
remains challenging. Chapter 12 is devoted to study of one of the most promising
devices for this conversion: ME transducers, consisting of composite materials with
piezoelectric and magnetostrictive layers. In Chap. 6, the authors have presented
the reader with the role of chirality as the key factor in magnetoelectric phenomena
observed in magnetic structures with various topological properties. In Chap. 17,
the authors present the theoretical framework that allows to describe the electromagnetic response of magnetoelectric media by means of axion-like extended electrodynamics. In Chap. 19, it is shown that topological singularities originated from
magnetic dipolar mode oscillations in ferrite disk particles have unique properties
of the magnetoelectric near-fields. Quantized ME fields suggest a conceptually new
microwave functionality for material characterization.
The studies shown in the book are enriched by Chap. 18. The analysis of the
Purcell effect in PT-symmetric waveguides presented in this chapter is a valuable
contribution in terms of basic aspects of symmetry in electromagnetic systems.
We may hope that the book will be a valuable aid to understand the current research
of chirality, magnetism, and magnetoelectric phenomena in metamaterial structures
for scientists, researchers, and graduate students working in the fields of electronic
engineering, material science, and condense matter physics.
Beer Sheva, Israel
Eugene Kamenetskii
vii
the center of mass of nano-objects. They show that all the basic elements of motion
control of nano-objects can be realized using optical manipulation. Recent advancements in nano- and micro-fabrication technology have allowed the realization of
artificially structured materials with strong electromagnetic chirality, far-exceeding
natural chiral materials. Implementation of artificial chirality in micro-/nano-scale
three-dimensional plasmonic structures is the subject of Chap. 10. Chiroptical lightmatter interaction is largely boosted in the surroundings of complex-shaped metallic
nanostructures. Theoretical generalization of the optical chirality to the case of arbitrary dispersive and lossy optical media is a subject of studies of Chap. 13. In Chap. 9,
the authors are aimed to create the background for establishing a connection between
the optics of chiral metamaterials and magnonics. This is a challenging task. Using
formal similarity of the electromagnetic field and spin waves in an antiferromagnetic insulator, the authors discuss the possibility to generalize the notion of optical
chirality in antiferromagnets with broken chiral symmetry. Concerning the studies of
light-matter interaction, it is very important to note that when analyzing the interaction of chiral light with a helical wavefront (due to spin and orbital angular momenta)
with chiral nanostructures, it is necessary to keep in mind the effects of nonlocality.
The reader may find that simple models based on the dipole approximation are inapplicable when analyzing such nonlocal optical response effects. It is also worth noting
that while in optics, a possible way to detect the effect of material chirality is through
the transmission and reflection of polarized light, in microwaves, chirality parameters
are obtained via far-field measurement of the scattering-matrix characteristics.
Any coupling between the magnetic and the electric properties of a material is
denoted, in its most general form, as the magnetoelectric (ME) effect. The efficient
energy conversion from the electric to the magnetic domain and vice versa still
remains challenging. Chapter 12 is devoted to study of one of the most promising
devices for this conversion: ME transducers, consisting of composite materials with
piezoelectric and magnetostrictive layers. In Chap. 6, the authors have presented
the reader with the role of chirality as the key factor in magnetoelectric phenomena
observed in magnetic structures with various topological properties. In Chap. 17,
the authors present the theoretical framework that allows to describe the electromagnetic response of magnetoelectric media by means of axion-like extended electrodynamics. In Chap. 19, it is shown that topological singularities originated from
magnetic dipolar mode oscillations in ferrite disk particles have unique properties
of the magnetoelectric near-fields. Quantized ME fields suggest a conceptually new
microwave functionality for material characterization.
The studies shown in the book are enriched by Chap. 18. The analysis of the
Purcell effect in PT-symmetric waveguides presented in this chapter is a valuable
contribution in terms of basic aspects of symmetry in electromagnetic systems.
We may hope that the book will be a valuable aid to understand the current research
of chirality, magnetism, and magnetoelectric phenomena in metamaterial structures
for scientists, researchers, and graduate students working in the fields of electronic
engineering, material science, and condense matter physics.
Beer Sheva, Israel
Eugene Kamenetskii