Engineered Magnetization Dynamics of Magnonic Nanograting Filters

Magnonic crystals and gratings could enable tunable spin-wave filters, logic, and frequency multiplier devices. Using micromagnetic models, we investigate the effect of nanowire damping, excitation frequency and geometry on the spin wave modes, spatial and temporal transmission profiles for a finite patterned nanograting under external direct current (DC) and radio frequency (RF) magnetic fields. Studying the effect of Gilbert damping constant on the temporal and spectral responses shows that low-damping leads to longer mode propagation lengths due to low-loss and high-frequency excitations are also transmitted with high intensity. When the nanowire is excited with stronger external RF fields, higher frequency spin wave modes are transmitted with higher intensities. Changing the nanowire grating width, pitch and its number of periods helps shift the transmitted frequencies over super high-frequency (SHF) range, spans S, C, X, Ku, and K bands (3–30 GHz). Our design could enable spin-wave frequency multipliers, selective filtering, excitation, and suppression in magnetic nanowires

Snowflakes:A Prototyping Tool for Computational Jewelry

Smart-jewelry design has many layers such as comfort, ergonomics, fashionability, interactivity and functionality that create a complex design process, making the form exploration challenging. Various wearable prototyping tools were developed to overcome this chal-lenge; however, they are usually textile-based and do not target smart jewelry design. To bridge this gap, we developed Snowfakes that diferentiates from existing tools by 1) allowing designers to ex-plore diferent jewelry forms, 2) incorporating external materials such as leather, 3) creating form factors that ft body parts with fexible con-nectors. In this paper, we explain the design process of Snowfakeswhich is inspired by 7 design parameters (limbs, materials, grip, fastener, decoration, placement, form) extracted through the ex-amination of non-smart jewelry. We also demonstrate three reim-plementations and design concepts implemented with Snowfakes.Our exploration with Snowfakes contributes to the wearable community in terms of smart-jewelry visual expressions, interaction modalities, and merger of traditional and computational materials.acceptedVersionPeer reviewe