Ontology highlight
ABSTRACT:
SUBMITTER: Tian Z
PROVIDER: S-EPMC7005747 | biostudies-literature | 2020 Feb
REPOSITORIES: biostudies-literature
Nature communications 20200207 1
The valley degree of freedom in crystals offers great potential for manipulating classical waves, however, few studies have investigated valley states with complex wavenumbers, valley states in graded systems, or dispersion tuning for valley states. Here, we present tunable valley phononic crystals (PCs) composed of hybrid channel-cavity cells with three tunable parameters. Our PCs support valley states and Dirac cones with complex wavenumbers. They can be configured to form chirped valley PCs i ...[more]