We show that surface waves supported by a negative permeability sphere (magnetic localized surface plasmons, MLSPs) can be well reproduced by the electromagnetic field scattered by a low-loss high-index dielectric sphere. In the magnetic resonance imaging (MRI) context, we suggest the use of these spoof MLSPs to increase MRI efficiency. More precisely, we show that the MLSPs, coupled to a standard radio-frequency (RF) surface coil, are able to enhance the MRI signal-to-noise ratio with respect to standard setups. Bearing in mind that RF high-index materials are available in nature, our results suggest a simple and novel approach for the realization of magnetic meta-devices at the desired radio-frequency.
Mimicking Magnetic Localized Surface PlasmonsWith High-Index Dielectrics: Enhancing Magnetic Resonance Imaging Signal-To-Noise Ratio
Rizza C.;Palange E.;Galante A.;Alecci M.
2021-01-01
Abstract
We show that surface waves supported by a negative permeability sphere (magnetic localized surface plasmons, MLSPs) can be well reproduced by the electromagnetic field scattered by a low-loss high-index dielectric sphere. In the magnetic resonance imaging (MRI) context, we suggest the use of these spoof MLSPs to increase MRI efficiency. More precisely, we show that the MLSPs, coupled to a standard radio-frequency (RF) surface coil, are able to enhance the MRI signal-to-noise ratio with respect to standard setups. Bearing in mind that RF high-index materials are available in nature, our results suggest a simple and novel approach for the realization of magnetic meta-devices at the desired radio-frequency.Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
