Synthetic exceptional points and unidirectional zero reflection in non-Hermitian acoustic systems
Exceptional points (EPs) are responsible for a number of interesting phenomena in non-
Hermitian wave systems. Here we show, both theoretically and experimentally, that EPs can …
Hermitian wave systems. Here we show, both theoretically and experimentally, that EPs can …
Non-Hermitian acoustic metamaterials: Role of exceptional points in sound absorption
Effective non-Hermitian Hamiltonians are obtained to describe coherent perfect absorbing
and lasing boundary conditions. PT symmetry of the Hamiltonians enables us to design …
and lasing boundary conditions. PT symmetry of the Hamiltonians enables us to design …
Absorption-lasing effects and exceptional points in parity-time symmetric non-Hermitian metaplates
Non-Hermitian systems that possess loss and gain have been receiving a great deal of
interest in various wave problems demonstrating diverse unprecedented wave phenomena …
interest in various wave problems demonstrating diverse unprecedented wave phenomena …
[HTML][HTML] Asymmetric scattering of flexural waves in a parity-time symmetric metamaterial beam
Non-Hermitian parity-time ( PT) symmetric systems that possess real eigenvalues have
been intensively investigated in quantum mechanics and rapidly extended to optics and …
been intensively investigated in quantum mechanics and rapidly extended to optics and …
Acoustic impurity shielding induced by a pair of metasurfaces respecting symmetry
H Zhang, Y Zhang, X Liu, Y Bao, J Zhao - Physical Review B, 2022 - APS
Impurities usually affect the transmission of acoustic signals, and how to effectively suppress
their adverse effects is an important content in the research of acoustic materials. In a recent …
their adverse effects is an important content in the research of acoustic materials. In a recent …
[PDF][PDF] Exceptional ring by non-Hermitian sonic crystals
BB Wang, Y Ge, SQ Yuan, D Jia, HX Sun - Prog. Electromagn. Res., 2023 - jpier.org
Exceptional point (EP) and exceptional ring (ER) are unique features for non-Hermitian
systems, which have recently attracted great attentions in acoustics due to their rich physical …
systems, which have recently attracted great attentions in acoustics due to their rich physical …
Controlling sound in non-hermitian acoustic systems
The concept of non-Hermitian physics has inspired numerous intriguing phenomena in
classical wave systems. By introducing judicious arrangements of gain and loss media, non …
classical wave systems. By introducing judicious arrangements of gain and loss media, non …
Experimental demonstration of an acoustic asymmetric diffraction grating based on passive parity-time-symmetric medium
Y Yang, H Jia, Y Bi, H Zhao, J Yang - Physical Review Applied, 2019 - APS
A passive parity-time (PT) symmetric medium provides a feasible scheme to experimentally
investigate non-Hermitian systems. We experimentally demonstrate an acoustic asymmetric …
investigate non-Hermitian systems. We experimentally demonstrate an acoustic asymmetric …
Unidirectional wave vector manipulation in two-dimensional space with an all passive acoustic parity-time-symmetric metamaterials crystal
Exploring the concept of non-Hermitian Hamiltonians respecting parity-time symmetry with
classical wave systems is of great interest as it enables the experimental investigation of …
classical wave systems is of great interest as it enables the experimental investigation of …
Topologically protected exceptional point with local non-Hermitian modulation in an acoustic crystal
The topological edge state (TES) may emerge at the interface between acoustic crystals with
distinct topological properties. It supports robust wave phenomena against geometry …
distinct topological properties. It supports robust wave phenomena against geometry …