2022
DOI: 10.1063/5.0091755
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Topological acoustic tweezer and pseudo-spin states of acoustic topological insulators

Abstract: Topological protection wave engineering in artificially structured media is at the forefront of metamaterials research. Acoustic analogs of electronic topological insulators have brought a lot of new opportunities for manipulating sound propagation and have attracted the attention of many scholars. A variety of artificial acoustic systems hosting topological edge states have been proposed. However, the pseudo-spin edge states at a boundary have not been clearly and intuitively characterized. In this article, w… Show more

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Cited by 11 publications
(5 citation statements)
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“…A 20 µm microparticle was rotated by the acoustic radiation force and streaming. Liu et al used the pseudospin topological edge states to control microparticle [712]. By choosing pseudospin up or pseudospin down states, the microparticle can be rotated clockwise or anticlockwise.…”
Section: Topological Acoustic Energy Harvest and Topological Acoustic...mentioning
confidence: 99%
“…A 20 µm microparticle was rotated by the acoustic radiation force and streaming. Liu et al used the pseudospin topological edge states to control microparticle [712]. By choosing pseudospin up or pseudospin down states, the microparticle can be rotated clockwise or anticlockwise.…”
Section: Topological Acoustic Energy Harvest and Topological Acoustic...mentioning
confidence: 99%
“…Opening nontrivial topological bandgap from two overlapping Dirac cones in the center of BZ can also be applied within triangular lattices consisting of six “meta-atoms” that can be either shrunken or expanded . The simplicity of this protocol has permitted to expand of these concepts to numerous platforms, ranging from soda can MMs, macroscopic phononic crystals to on-chip systems, whose reconfigurability opens the door to practical devices. , Cha et al measured robust edge transport using free-standing silicon nitride nanomembranes, paving the way for highly compact topological nanoelectromechanical MMs, Figure (e).…”
Section: Topological Phases In 2d Metamaterials With Time-reversal Sy...mentioning
confidence: 99%
“…As an extension of TIs, high-order topological insulators (HOTIs) have attracted extensive attention of many researchers since they were revealed [1][2][3][4][5], which host topologically protected corner states and have strong stability and robustness [6]. More recently, many models have been intensively explored in photonics [7][8][9][10][11][12][13], acoustics [14][15][16][17][18][19][20], and electric circuits [21][22][23][24][25].…”
Section: Introductionmentioning
confidence: 99%