2022
DOI: 10.1088/1367-2630/aca21d
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Acoustic suppressed topological refraction in valley sonic crystals

Abstract: We report both experimentally and numerically that an acoustic suppressed topological refraction is realized by two kagome-lattice valley sonic crystals (VSCs). By simply rotating triangle rods in the VSCs, acoustic valley Hall phase transitions can be obtained. In a designed topological waveguide composed of two VSCs with distinct valley topological phases, two types of valley edge states can be observed in the domain wall. Furthermore, the topological waveguide can support a suppressed topological refraction… Show more

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Cited by 5 publications
(2 citation statements)
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“…Non-Hermitian physics can be verified by using acoustics and electromagnetics, which not only provide a better understanding [20][21][22] but also bring non-Hermitian physics closer to practical applications. [23,24] Several interesting re-searches have shown unique features of exceptional point and exceptional ring [25,26] and the extraordinary capabilities in manipulating wavefronts asymmetrically. [27][28][29] Recent explorations of loss and gain within the framework of non-Hermitian systems play important roles in controlling acoustic transport, especially amplitude modulation.…”
Section: Introductionmentioning
confidence: 99%
“…Non-Hermitian physics can be verified by using acoustics and electromagnetics, which not only provide a better understanding [20][21][22] but also bring non-Hermitian physics closer to practical applications. [23,24] Several interesting re-searches have shown unique features of exceptional point and exceptional ring [25,26] and the extraordinary capabilities in manipulating wavefronts asymmetrically. [27][28][29] Recent explorations of loss and gain within the framework of non-Hermitian systems play important roles in controlling acoustic transport, especially amplitude modulation.…”
Section: Introductionmentioning
confidence: 99%
“…of valley pseudospin into the subfields of physics, such as photonics [1][2][3][4][5][6][7][8][9][10][11], acoustics [12][13][14][15][16][17][18][19][20][21][22], and mechanics . In the field of mechanics, by breaking the mirror [27,29,39,43] or inversion [23-26, 28, 30-38, 40-42, 44] symmetry, the band inversion and valley Hall phase transitions caused by elastic phononic crystals (EPCs) have been realized, and the edge states which support robust topological valley transports can be observed at a domain wall (DW) between the two EPCs with opposite valley Chern numbers.…”
Section: Introductionmentioning
confidence: 99%