Category Physics

Schematic diagram of the experimental setup used to transfer energy between two circuits, developed by UAB researchers. Credit: Jordi Prat

Researchers have developed a system which efficiently transfers electrical energy between 2 separate circuits. The system, made with a shell of metamaterials which concentrates the magnetic field, could transmit energy efficiently enough to charge mobile devices without having to place them close to the charging base. Wireless charging of mobile devices is possibly one of the most desired technological milestones. Some devices can already be charged wirelessly by placing the mobile device on top of a charging base. The next step, charging devices without the need of taking them out of one’s pocket, might be just around the corner.

A new system can effic...

Ferromagnetism and semiconductor spintronics offer new opportunities for improving electronics. Credit: The Story Laboratory, LLC

More, faster, better, cheaper. These are the demands of our device-happy and data-centered world. Meeting these demands requires technologies for processing and storing information. Now, a significant obstacle to the development of next-generation device technologies appears to have been overcome. The team is the first to report growing iron-doped ferromagnetic semiconductors working at room temperature – a longstanding physical constraint. Ferromagnetic semiconductors are valued for their potential to enhance device functionality by utilizing the spin degrees of freedom of electrons in semiconductor devices.

“Bridging semiconductor and magnetism is desirable be...

Fig. 1: Experimental data: (a) Two-dimensional (2D) scan of the sum of the electric fields E(?,t) of the three driving THz pulses A, B, and C as a function of the coherence time ? and the real time t. The contour plot is colored red for positive electric fields and blue for negative fields. (b) 2D scan of electric field ENL(?,t) nonlinearly emitted by the two-phonon coherence in InSb. The orange dashed line indicates the center of pulse A. (c) Electric field transient ENL(0,t) for the coherence time ?=0. Credit: Image courtesy of Forschungsverbund Berlin e.V. (FVB)

Two-quantum oscillations of atoms in a semiconductor crystal are excited by ultrashort terahertz pulses...

(Tech Xplore)—Over at the University of California Berkeley the field of biomimetics is alive and well with researchers actively studying and harnessing the way animals can move and manage their environments— little is ignored in the mechanics and dynamics as the researchers see if they can come up with little robots with like capabilities

Over at the Uni of CA Berkeley the field of biomimetics is alive and well with researchers actively studying and harnessing the way animals can move and manage their environments. A video is up as well that shows how “Two VelociRoACH Robots Cooperatively Climb a Step.” The importance of their work is focused on the fact that they used two robots to accomplish an otherwise daunting task of climbing something...