The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The magnetised plasma of near-Earth space (magnetosphere) supports two ultra-low frequency (ULF; 1-100 mHz), magnetohydrodynamic (MHD) oscillations known as the shear and fast Alfvén wave modes. The fast mode propagates across the ambient magnetic field, spreading ULF wave energy throughout the magnetosphere. For sufficiently large ionosphere conductance, the shear Alfvén mode forms field line resonances...
This paper introduces an effective-media toolset that can be used for the design of metamaterial structures based on metallic components such as split-ring resonators and dipoles, as well as dielectric spherical resonators. For demonstration purposes the toolset will be used to generate infrared metamaterial designs, and the predicted performances will be verified with full-wave numerical simulations.
The complex near-field interactions in metamaterials provide a unique opportunity to tailor their response by modifying the lattice structure. We show that a lateral offset between the layers of rings provides a convenient tuning mechanism, and how the frequency tuning can be easily predicted from the charge distribution of a single ring at resonance.
Motivated by functions that could be enabled with combined nanomechanical and nanomagnetic structures, we have embarked on a program of fabrication and characterization of nanomagnetomechanical systems. Fabrication strategies include conventional electron beam lithography with release from a sacrificial layer, and focused ion beam nanomachining of “2D” and “3D” precursor materials. Characterization...
The problem of diffraction of electromagnetic plane waves from a perfectly conducting periodic strip grating is solved when the grating lies at the half-space interface between a lossy ferromagnetic medium and free space. Rigorous solution is obtained by a Riemann-Hilbert approach.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.