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    Compact phononic circuits guide sound at gigahertz frequencies for chip-scale devices

    September 22, 2025, Categories  Physics, Technology/Electronics

    Compact and reconfigurable phononic circuits that operate at gigahertz frequencies
    Topological phononic chip platform. a, Illustration of integrated devices that use topologically protected sound waves, including a phonon pump, an edge-waveguide, and an intensity modulator. b, Top: cross-section of the GaN-on-sapphire waveguide, showing its width (w) and thickness (h). Bottom: simulated vibration pattern of the main guided sound wave. c, Electron microscope image of the aluminum transducer used to generate 1.5 GHz phonons. d, Photo of the fabricated topological phononic chip. e, Diagram of the experimental setup, combining a custom optical vibrometer with a motorized stage to map how sound waves travel in the chip. Credit: Xu et al

    Compact phononic circuits guide sound at gigahertz frequencies for chip-scale devices

    Phononic circuits are emerging devices that can ...

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    Next Generation Computers: New Wiring Material could Transform Chip Technology

    January 22, 2025, Categories  Technology/Electronics

    Credit: Pixabay/CC0 Public Domain

    The rapid technological advancements of our world have been enabled by our capacity to design and fabricate ever smaller electronic chips. These underpin computers, mobile phones and every smart device deployed to date.

    One of the many challenges is that electronic components generate increasingly more heat as they are miniaturized. A significant issue lies in making the wires which connect the transistors on the chip thinner while ensuring that the minimum amount of heat is released.

    These interconnects are typically made from copper, and as we start to scale them down to nano-scale thicknesses, their electrical resistance increases rapidly because the electrons moving along the wires have a higher probability of colliding into the surface of th...

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