556
E. Kamenetskii
Fig. 19.19 Numerical results showing the twisted-field effect of penetration microwave power
through a thin metal screen
in the electromagnetic theory, the dual symmetry is spontaneously and explicitly
broken. This results in non-trivial coupling between pseudoscalar quasistatic ME
fields and the EM fields in microwave structures with an embedded MDM ferrite
disk.
Long range magnetic dipole-dipole correlation can be treated in terms of collective magnetostatic excitations of the system. In small ferromagnetic-resonance ferrite
disk, macroscopic quantum coherence can be observed. In a case of a quasi-2D
ferrite disk, the quantized forms of these collective matter oscillations—the MDM
magnons—were found to be quasiparticles with both wave-like and particle-like
behaviors, as expected for quantum excitations. With use of MS-potential scalar
wave function ψ we formulate properly the energy eigenstate problem based on the
Schrödinger-like equation. We obtain currents (fluxes) for MS modes. We show that
in a subwavelength ferrite-disk particle one can observe an angular momentum due to
the power-flow circulation of double-valued edge MS-wave functions. For incident
electromagnetic wave, this magnon subwavelength particle emerges as a singular
point carrying quanta of angular momenta. In a ferrite-disk sample, the magnetization has both the spin and orbital rotations. There is the spin-orbit interaction between
these angular momenta. The MDMs are characterized by the pseudoscalar magnetization helicity parameter, which can be considered as a certain source of the helicity
properties of ME fields.
Quantized ME fields arising from nonhomogeneous ferromagnetic resonances
with spin-orbit effect, suggest a conceptually new microwave functionality for material characterization. Due to unique structures of twisted ME near fields, one can
observe angular momentums (spin and orbital) transfer to electric polarization in
a dielectric sample. The chiral structure of near-field ME provides the potential
for microwave chirality discrimination in chemical and biological objects. Twisted
E. Kamenetskii
Fig. 19.19 Numerical results showing the twisted-field effect of penetration microwave power
through a thin metal screen
in the electromagnetic theory, the dual symmetry is spontaneously and explicitly
broken. This results in non-trivial coupling between pseudoscalar quasistatic ME
fields and the EM fields in microwave structures with an embedded MDM ferrite
disk.
Long range magnetic dipole-dipole correlation can be treated in terms of collective magnetostatic excitations of the system. In small ferromagnetic-resonance ferrite
disk, macroscopic quantum coherence can be observed. In a case of a quasi-2D
ferrite disk, the quantized forms of these collective matter oscillations—the MDM
magnons—were found to be quasiparticles with both wave-like and particle-like
behaviors, as expected for quantum excitations. With use of MS-potential scalar
wave function ψ we formulate properly the energy eigenstate problem based on the
Schrödinger-like equation. We obtain currents (fluxes) for MS modes. We show that
in a subwavelength ferrite-disk particle one can observe an angular momentum due to
the power-flow circulation of double-valued edge MS-wave functions. For incident
electromagnetic wave, this magnon subwavelength particle emerges as a singular
point carrying quanta of angular momenta. In a ferrite-disk sample, the magnetization has both the spin and orbital rotations. There is the spin-orbit interaction between
these angular momenta. The MDMs are characterized by the pseudoscalar magnetization helicity parameter, which can be considered as a certain source of the helicity
properties of ME fields.
Quantized ME fields arising from nonhomogeneous ferromagnetic resonances
with spin-orbit effect, suggest a conceptually new microwave functionality for material characterization. Due to unique structures of twisted ME near fields, one can
observe angular momentums (spin and orbital) transfer to electric polarization in
a dielectric sample. The chiral structure of near-field ME provides the potential
for microwave chirality discrimination in chemical and biological objects. Twisted