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Fano resonances of microwave structures with embedded magneto-dipolar quantum dots | | E.O. Kamenetskii
; G. Vaisman
; R. Shavit
; | | Date: |
11 Sep 2013 | | Abstract: | Long range dipole-dipole correlation in a ferromagnetic sample can be treated
in terms of collective excitations of the system as a whole. Ferrite samples
with linear dimensions smaller than the dephasing length, but still much larger
than the exchange-interaction scales are mesoscopic structures. Recently, it
was shown that mesoscopic quasi-2D ferrite disks, distinguishing by
multiresonance magneto-dipolar-mode (MDM) spectra, demonstrate unique
properties of artificial atomic structures: energy eigenstates, eigen
power-flow vortices and eigen helicity parameters. Because of these properties,
MDMs in a ferrite disk enable the confinement of microwave radiation to
subwavelength scales. In microwave structures with embedded MDM ferrite
samples, one can observe quantized fields with topologically distinctive
characteristics. The use of a quasi-2D ferrite-disk scatterer with internal MDM
resonance spectra along the channel propagation direction could change the
transmission dramatically. In this paper, we show that interaction of the MDM
ferrite particle with its environment has a deep analogy with the
Fano-resonance interference observed in natural and artificial atomic
structures. We characterize the observed effect as Fano-resonance interference
in MDM quantum dots. | | Source: | arXiv, 1309.2792 | | Services: | Forum | Review | PDF | Favorites | |
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