Ontology highlight
ABSTRACT:
SUBMITTER: Lan J
PROVIDER: S-EPMC7330048 | biostudies-literature | 2020 Jul
REPOSITORIES: biostudies-literature
Scientific reports 20200701 1
Negative refraction plays an important role in acoustic wave manipulation and imaging. However, conventional systems based on acoustic metamaterials suffer from the limits induced by loss-related and resolution issues. In this work, a parity-time (PT)-symmetric system is introduced to realize loss-free bidirectional acoustic negative refraction. The system is composed of a pair of locally PT-symmetric multi-layer metasurfaces sandwiching a region of free space, which also forms a global PT symme ...[more]