Manipulating microwaves with magnetic-dipolar-mode vortices

Journal Article · Sat May 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.053823· OSTI ID:21431021

Kamenetskii, E O; Sigalov, M; Shavit, R ^[1]

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1. Department of Electrical and Computer Engineering, Ben Gurion University of the Negev, IL-84 105 Beer Sheva (Israel)

There has been a surge of interest in the subwavelength confinement of electromagnetic fields. It is well known that, in optics, subwavelength confinement can be obtained from surface plasmon (quasielectrostatic) oscillations. In this article, we propose to realize subwavelength confinement in microwaves by using dipolar-mode (quasimagnetostatic) magnon oscillations in ferrite particles. Our studies of interactions between microwave electromagnetic fields and small ferrite particles with magnetic-dipolar-mode (MDM) oscillations show strong localization of electromagnetic energy. MDM oscillations in a ferrite disk are at the origin of topological singularities resulting in Poynting vector vortices and symmetry breakings of the microwave near fields. We show that new subwavelength microwave structures can be realized based on a system of interacting MDM ferrite disks. Wave propagation of electromagnetic signals in such structures is characterized by topological phase variations. Interactions of microwave fields with an MDM ferrite disk and MDM-disk arrays open a perspective for creating engineered electromagnetic fields with unique symmetry properties.

• OSTI ID: 21431021
• Journal Information: Physical Review. A, Vol. 81, Issue 5; Other Information: DOI: 10.1103/PhysRevA.81.053823; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CONFINEMENT
ELECTROMAGNETIC FIELDS
FERRITE
FERRITES
INTERACTIONS
MICROWAVE RADIATION
OPTICS
ORIGIN
OSCILLATIONS
PARTICLES
POYNTING THEOREM
SIGNALS
SINGULARITY
SURFACES
SYMMETRY BREAKING
TOPOLOGY
WAVE PROPAGATION
ALLOYS
CARBON ADDITIONS
ELECTROMAGNETIC RADIATION
FERRIMAGNETIC MATERIALS
IRON ALLOYS
IRON COMPOUNDS
MAGNETIC MATERIALS
MATERIALS
MATHEMATICS
OXYGEN COMPOUNDS
RADIATIONS
TRANSITION ELEMENT ALLOYS
TRANSITION ELEMENT COMPOUNDS