technology

A Penn chip steers gigahertz sound around sharp corners without loss
Star-shaped holes in an aluminum nitride membrane trap sound waves near 1 GHz along one edge, an idea borrowed from quantum physics that could…
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Sunday, November 15, 2026 · The Sunday letter

Star-shaped holes in an aluminum nitride membrane trap sound waves near 1 GHz along one edge, an idea borrowed from quantum physics that could…