Chirality, Magnetism and Magnetoelectricity: Separate Phenomena and Joint Effects in Metamaterial Structures (Topics in Applied Physics, 138)

Preface
Contents
Contributors
1 Chiral Coupling to Magnetodipolar Radiation
	1.1 Introduction
	1.2 Chiral Excitation of Spin Waves by Metallic Stripline
		1.2.1 Oersted Magnetic Fields
		1.2.2 Chiral Excitation of Spin Waves
	1.3 Chiral Spin Wave Excitation and Absorption by a Magnetic Transducer
		1.3.1 Chiral Magnetodipolar Field
		1.3.2 Non-local Detection
		1.3.3 Coherent Chiral Spin Wave Transmission
		1.3.4 Incoherent Chiral Pumping
	1.4 Conclusion and Outlook
	References
2 Surface Plasmons for Chiral Sensing
	2.1 Introduction
		2.1.1 Chirality and Optical Activity
		2.1.2 Chiral Sensing Techniques
	2.2 Surface Plasmon Resonance (SPR)
		2.2.1 SPPs at a Metal-Dielectric Interface
		2.2.2 SPPs at a Metal-Chiral Interface
	2.3 CHISPR
		2.3.1 Mechanism of Chiral-Dependent SPR-Reflectance Angular Split
		2.3.2 Sensitivity of Chiral-Dependent SPR-reflectance Angular Split
		2.3.3 Differential Measurements
	2.4 Complete Measurement of Chirality
	2.5 Optical Chirality Conservation
	2.6 Discussion and Conclusions
	References
3 Spin-Polarized Plasmonics: Fresh View on Magnetic Nanoparticles
	3.1 Introduction
	3.2 Spin Polarization in Co Nanoparticles
	3.3 Methods
	3.4 Structural Properties
	3.5 Magnetic Response
	3.6 Optical Resonance in Spin-Polarized Co Nanoparticles
	3.7 Effect of Dimers
	3.8 Conclusions
	References
4 Chirality and Antiferromagnetism in Optical Metasurfaces
	4.1 Introduction
		4.1.1 Optical Elements
		4.1.2 History of Optical Metasurfaces
	4.2 Chirality of Light
		4.2.1 Spin of a Photon and Spin Angular Momentum
		4.2.2 Optical Vortices and Orbital Angular Momentum
	4.3 Optical Chiral Metasurfaces
		4.3.1 Plasmonic Chiral Metasurfaces
		4.3.2 Chiral Nanosieves
		4.3.3 Dielectric Chiral Metasurfaces and Anti-ferromagnetic Resonances
	4.4 Applications of Chiral Light and Metasurfaces
		4.4.1 Circular Dichroism and Helical Dichroism
		4.4.2 Chiral Meta-Optics
	4.5 Conclusions
	References
5 Light-Nanomatter Chiral Interaction in Optical-Force Effects
	5.1 Introduction
	5.2 3D Near-Field CD by Optical-Force Measurement
		5.2.1 Model and Method
		5.2.2 CD Spectra and NF-CD Maps
		5.2.3 CD of Optical Force
	5.3 Optical Force to Rotate Nano-Particles in Nanoscale Area
		5.3.1 Model and Method
		5.3.2 Optical Force to Rotate the NP
		5.3.3 Optical Current
	5.4 Summary
	References
6 Magnetoelectricity of Chiral Micromagnetic Structures
	6.1 Introduction. Chiral Structures of an Order Parameter
	6.2 Microscopic Mechanisms of Spin Flexoelectricity
	6.3 Chirality Dependent Domain Wall Motion
	6.4 Chirality Dependent Bubble Domain Generation
	6.5 Spin Flexoelectricity of Bloch Lines, Vortexes and Skyrmions
	6.6 Conclusion
	Appendix: Experimental and Calculation Details
	References
7 Current-Induced Dynamics of Chiral Magnetic Structures: Creation, Motion, and Applications
	7.1 Introduction
	7.2 Continuum Model for the Magnetization
		7.2.1 Magnetization Statics
		7.2.2 Magnetization Dynamics in the Presence of Spin-Torques
	7.3 Magnetic Solitons
	7.4 Creation of Magnetic Solitons
		7.4.1 Creation of One-Dimensional Solitons
		7.4.2 Creation of Two-Dimensional Solitons
	7.5 Motion of Magnetic Solitons
		7.5.1 A Collective Coordinate Approximation: Thiele Equations of Motion
		7.5.2 Magnetization Dynamics of Domain Walls in Nanowires
		7.5.3 Magnetization Dynamics of Two-Dimensional Solitons
		7.5.4 Magnetization Dynamics of Three-Dimensional Hopfions
	7.6 Potential Applications
		7.6.1 Storage and Logic Technologies
		7.6.2 Unconventional Spintronics-Based Computing Schemes
	7.7 Conclusion
	References
8 Microwave-Driven Dynamics of Magnetic Skyrmions Under a Tilted Magnetic Field: Magnetic Resonances, Translational Motions, and Spin-Motive Forces
	8.1 Introduction
	8.2 Spin Model of the Skyrmion-Hosting Magnets
	8.3 Microwave-Active Spin-Wave Modes
	8.4 Microwave-Magnetic-Field-Driven Translational Motion of Skyrmion Crystal
	8.5 Microwave-Electric-Field-Driven Translational Motion of Isolated Skyrmions
	8.6 Electrically Driven Spin Torque and Dynamical Dzyaloshinskii-Moriya Interaction
	8.7 Microwave-Induced DC Spin-Motive Force
	8.8 Concluding Remarks
	References
9 Symmetry Approach to Chiral Optomagnonics in Antiferromagnetic Insulators
	9.1 Introduction
	9.2 Optical Chirality and Nongeometric Symmetries of the Maxwell\'s Equations
		9.2.1 Symmetry Analysis of the Maxwell\'s Equations
		9.2.2 Optical Chirality in Gyrotropic Media
	9.3 Spin-Wave Chirality in Antiferromagnetic Insulators
		9.3.1 Equations of Motion for Antiferromagnetic Spin Waves
		9.3.2 Nongeometric Symmetries for Spin-Wave Dynamics
		9.3.3 Conserving Chirality of Spin Waves
		9.3.4 Spin-Wave Chirality in Dissipative Media
	9.4 Excitation of Magnon Spin Photocurrents with Polarized Fields
		9.4.1 Magnon Spin Currents in Antiferromagnets
		9.4.2 Photo-Excitation of Magnon Spin Currents
		9.4.3 Microscopic Theory of Magnon Spin Photocurrents
		9.4.4 Magnon Spin Photocurrents in Antiferromagnetic Insulators and Low Dimensional Materials
	9.5 Conclusions
	References
10 Realization of Artificial Chirality in Micro-/Nano-Scale Three-Dimensional Plasmonic Structures
	10.1 Introduction
	10.2 Chirality at the Micrometer-Scale or Higher: Top-Down Approach
		10.2.1 Direct Laser Writing
		10.2.2 Buckling Process Using Focused Ion Beam
	10.3 Chirality at the Nanometer to Micrometer Scale
		10.3.1 Electron Beam Lithography Overlay
		10.3.2 Glancing Angle Deposition
		10.3.3 Unconventional Approaches
	10.4 Chirality at a Nanometer Scale: Bottom-Up Approach
		10.4.1 Molecular Self-assembly
		10.4.2 DNA Self-assembly
		10.4.3 Block Copolymer Self-assembly
	10.5 Conclusion
	References
11 Floquet Theory and Ultrafast Control of Magnetism
	11.1 Introduction
	11.2 Floquet Engineering
		11.2.1 Floquet Theorem
		11.2.2 Discretized Fourier Transformation and Matrix Form of Schrødinger Equation
		11.2.3 Floquet-Magnus Expansion and Floquet Hamiltonian
		11.2.4 Physical Meaning of Floquet Hamiltonian
	11.3 Laser and Typical Excitations in Solids
	11.4 Floquet Engineering in Magnets
		11.4.1 Inverse Faraday Effect by THz Laser
		11.4.2 Ultrafast Control of Spin Chirality and Spin Current in Multiferroic Magnets
	11.5 Summary and Outlook
	References
12 Magnetoelastic Waves in Thin Films
	12.1 Introduction
	12.2 Spin Waves
		12.2.1 Magnetic Interactions and Magnetization Dynamics
		12.2.2 Spin Waves in the Bulk Ferromagnets
		12.2.3 Spin Waves in Ferromagnetic Thin Films
	12.3 Elastic Waves
		12.3.1 Elastodynamic Equations of Motion
		12.3.2 Elastic Waves in Thin Films
	12.4 Magnetoelastic Waves
		12.4.1 Magnetoelastic Interactions
		12.4.2 Magnetoelastic Waves in Thin Films
		12.4.3 Damping of Magnetoelastic Waves
	12.5 Conclusion
	References
13 Theoretical Generalization of the Optical Chirality to Arbitrary Optical Media
	13.1 Introduction
	13.2 Electromagnetic Energy Density in Dispersive and Lossy Media: A General Approach from the Continuity Equation
		13.2.1 Poynting\'s Theorem and Energy Density in Non-Dispersive Media
		13.2.2 Electromagnetic Energy Density in Dispersive Media: Lossless (Brillouin\'s Approach) and Lossy (Loudon\'s Approach) Cases
	13.3 Generalizing the Conservation Law for the Optical Chirality
	13.4 Optical Chirality Density in Linear Dispersive Media
		13.4.1 Optical Chirality Density in Dispersive and Lossless Media: Brillouin\'s Approach
		13.4.2 Optical Chirality Density in Dispersive and Lossy Media: Loudon\'s Approach
		13.4.3 Brillouin\'s Approach Vs Loudon\'s Approach
	13.5 Conclusions and Outlook
	References
14 Topology in Magnetism
	14.1 Introduction
	14.2 Topological Spin Textures
		14.2.1 Domain Walls
		14.2.2 Vortices and Skyrmions
		14.2.3 Hopfions
	14.3 Topological Spin Waves
		14.3.1 Topologically Protected Edge Spin Waves
		14.3.2 3D Topological Spin Waves
	14.4 Conclusion
	References
15 Topological Dynamics of Spin Texture Based Metamaterials
	15.1 Introduction
	15.2 Topological Structures, Properties, and Applications of Magnetic Solitons
	15.3 The Topological Properties of Skyrmion Lattice
		15.3.1 Large-Scale Micromagnetic Simulations
		15.3.2 Theoretical Model
	15.4 Corner States in a Breathing Kagome Lattice of Vortices
		15.4.1 The Theoretical Results and Discussions
		15.4.2 Micromagnetic Simulations
	15.5 Corner States in a Breathing Honeycomb Lattice of Vortices
		15.5.1 Theoretical Model
		15.5.2 Corner States and Phase Diagram
		15.5.3 Micromagnetic Simulations
	15.6 Conclusion and Outlook
	References
16 Antiferromagnetic Skyrmions and Bimerons
	16.1 Introduction
	16.2 Current-Driven Creation, Motion, and Chaos of Antiferromagnetic Skyrmions and Bimerons
	16.3 Spin Torque Nano-oscillators Based on Antiferromagnetic Skyrmions
	16.4 Synthetic Antiferromagnetic Skyrmions Driven by the Spin Current
	16.5 Antiferromagnetic Skyrmions Driven by the Magnetic Anisotropy Gradient
	16.6 Pinning and Depinning of Antiferromagnetic Skyrmions
	16.7 Summary
	References
17 Axion Electrodynamics in Magnetoelectric Media
	17.1 Introduction
	17.2 Nondynamical Axion Electrodynamics
	17.3 The Green Function Approach to the Electromagnetic Response of Linear Isotropic Homogeneous Magnetolectric Media
	17.4 The Casimir Effect
	17.5 Reversed Vavilov-Cherenkov (VC) Radiation in Naturally Existing Magnetoelectric Media
	17.6 Electromagnetic Response of Weyl Semimetals
		17.6.1 Electric Charge Near a Weyl Semimetal
		17.6.2 Experimental Proposals
	17.7 Conclusions
	References
18 Purcell Effect in PT-Symmetric Waveguides
	18.1 Introduction
	18.2 Principles of PT Symmetry
		18.2.1 Phase Transition in PT-Symmetric Systems
		18.2.2 PT-Symmetry in Optics
		18.2.3 Inner Product for PT-Symmetric Optical Systems
		18.2.4 Petermann Factor
		18.2.5 Eigenmodes of PT-Symmetric Optical Systems
	18.3 PT-Symmetric Photonic Devices
		18.3.1 Coupled Waveguide Systems
		18.3.2 Two-Dimensional Photonic Waveguide Lattices
		18.3.3 Multilayer Structures
		18.3.4 Microresonators
	18.4 Purcell Effect in PT-Symmetric Waveguides
		18.4.1 Reciprocity Approach
		18.4.2 Modal Purcell Factor Within the Coupled Mode Theory
		18.4.3 Numerical Example: PT-Symmetric Coupler
	18.5 Summary and Outlook
	References
19 Magnetoelectric Near Fields
	19.1 Introduction
	19.2 Subwavelength Resonators with Dipole-Carrying Excitations
	19.3 Near Fields of MDM Oscillations—the ME Near Fields
	19.4 MDM Particles Inside Waveguides and Cavities
	19.5 Transfer of Angular Momentum to Dielectric Materials, Metals and Biological Structures from MDM Resonators
	19.6 Conclusion
	References
Subject Index