Time-Varying Strong Coupling and the Induced Time Diffraction of Magnon Modes.

Time-varying media break temporal translation symmetry, enabling advanced wave manipulation. However, this phenomenon remains largely unexplored in magnonic systems due to the challenge of achieving rapid and significant changes in magnon dispersion. Here, we construct a time-varying strong coupling between two magnon modes and observe chirped Rabi-like oscillations near the pulse edges.

Magnetic Dynamics Variation Induced by the Meissner Effect in Superconductor/Ferromagnet Heterostructures.

Magnetic dynamics in superconductor (S)/ferromagnet (F)/superconductor (S) heterostructures is a focal spot in spintronics, but its physical origin remains debated. In this study, we fabricated S/F/S and S/Pt/F/Pt/S heterostructures to explore the impact of S layers on the magnetization dynamics of the F layer. We found that the ferromagnetic resonance field of the F layer shifted to lower fields as the temperature declined below the superconducting critical temperature .

Meterscale Strong Coupling between Magnons and Photons.

We experimentally realize a meterscale strong coupling effect between magnons and photons at room temperature, with a coherent coupling of ∼20  m and a dissipative coupling of ∼7.6  m. To this end, we integrate a saturable gain into a microwave cavity and then couple this active cavity to a magnon mode via a long coaxial cable.

Magnetic field-dependent shape anisotropy in small patterned films studied using rotating magnetoresistance.

Based on the electric rotating magnetoresistance method, the shape anisotropy of a Co microstrip has been systematically investigated. We find that the shape anisotropy is dependent not only on the shape itself, but also on the magnetization distribution controlled by an applied magnetic field. Together with micro-magnetic simulations, we present a visualized picture of how non-uniform magnetization affects the values and polarities of the anisotropy constants K1 and K2.

Remarkably enhanced red-NIR broad spectral absorption via gold nanoparticles: applications for organic photosensitive diodes.

For organic films, remarkably enhanced red-NIR broad spectral absorption was achieved via the incorporation of gold nanoparticles (AuNPs) using a simple and facile preparation. The relevant thermal evaporation method has produced size-controllable AuNPs in the range of 0-20 nm diameter. The potential use of localized surface plasmon resonance (LSPR) enhanced organic photosensitive diodes (OPDs) as sensitive broadband sensors was discussed in this context.