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physics.class-ph2026
Topological mode conservation and conversion in phononic crystals with temporal interfaces
Mahmoud M. Samak, Osama R. Bilal
A sudden change in material properties creates a temporal interface and forces a propagating wave to change its frequency while preserving its wavenumber. In contrast to monoatomic…
physics.app-ph2026
Hierarchical metamaterials with tunable flat bands, zero-frequency, and wavenumber gaps
Mohamed A. Elgamal, Osama R. Bilal
Metamaterials are arrangement of basic building blocks that repeat in space, time, or both. These material systems serve as an excellent platform for controlling waves, such as eng…