The focusing properties of spin wave with Fresnel lens phase profile

Spin‐Wave Optics in YIG Realized by Ion‐Beam Irradiation

“…A major motivation behind magnonics research is to replicate the functionality of bulky optical components in chip-scale devices that are amenable to integration with microelectronic circuitry. [1][2][3][4][5][6][7] This way, the functionality of coherent optical computers could also be cloned in the magnonic domain. Spin waves (SWs) display interference phenomena that resemble that of optical waves, but they offer submicron (possibly sub-100 nm) wavelength and can be launched and detected by electrical means.…”

Magnetically tunable Airy-like beam of magnetostatic surface spin waves

“…This wave propagates by means of the procession due to the exchange or dipole-dipole interactions [21] . In the past decades, SWs have been explored extensively for both fundamentally interesting and promising potential applications in high-density storage and information processing [21][22][23][24][25][26] . For massive application of SWs, methods to readily manipulate and shape SWs must be developed.…”

“…However, it is not a trivial task due to diverse forms of SWs. Until now, all kinds of methods, for example, patterned or non-uniform magnetic field [21][22][23][24][25][26] , varied thickness of modulated magnetic film [27] , and the phase of excitation sources, have been developed to experimentally focus, guide, split, and shape SWs to match various applications.…”

“…As we know, there are several types of SWs that can be excited with various magnetic field configurations [26] . For example, the forward-volume magnetostatic SWs (FVMSWs) would be excited when the direction of the applied magnetic field is perpendicular to the ferromagnetic film.…”