Here, we propose to overcome this limitation by utilizing soft topological phononic crystals. In particular, we design a simple one-dimensional periodic system of soft cylindrical waveguides to realize mechanically tunable topological interface states for longitudinal waves. To this end, we employ the ...
Strategically combining four structured domains creates the first ever three-way topological energy-splitter; remarkably, this is only possible using a square, or rectangular, lattice, and not the graphene-like structures more commonly used in valleytron
piezoelectric patches—exploiting the piezoelectric effect for the active mechanism15. A mechanical system converts the topological states of a metamaterial using motors, thereby producing extraordinary vibrational behaviours16. A different mechanical approach for acoustic modulation is demonstrated by using an...
Elastic wave demultiplexer with frequency dependent topological valley Hall edge states 2024, Thin-Walled Structures Citation Excerpt : This kind of demultiplexer allows a flexible transportation path even with sharp corners, but it still suffers from the limitations in narrow operating band and energy ...
Thermally tunable topological transmission of elastic waves in solid phononic crystalsElastic waveThermally tunableTopological edge statesNon-contactElastic wave topology materials have attracted widespread attention due to their protection by topological properties, which can accurately guide and control the ...
Valley Hall topological insulators (VHTIs) in condensed matter physics have been recently extended to acoustic systems and have attracted great attention. However, the current acoustic topological insulators (ATIs) are mainly based on the mechanism of Bragg scattering in phononic crystals. Their ...
PHONONIC crystalsKnowledge of magnetic symmetry is vital for exploiting nontrivial surface states of magnetic topological materials. EuIn2As2 is an excellent example, as it is predicted to have collinear antiferromagnetic order where the magnetic moment direction determines either a topological-crystalline-...
Lee, T. G.et al.Enhanced energy transfer and conversion for high performance phononic crystal-assisted elastic wave energy harvesting.Nano Energy78, 105226 (2020). ArticleCASGoogle Scholar Lee, T. & Iizuka, H. Bragg scattering based acoustic topological transition controlled by local resonance.Phys...
Soft phononic composite Real-time tuning Acoustic band gaps Acoustic impedance difference 1. Introduction Phononic crystals (PCs) first proposed by Kushwaha et al. [1] are artificial functional materials with periodic internal structures. The occurrence of acoustic band gaps (ABGs) makes the PC a ...
Since the concept of phononic crystals (i.e. PCs, which are intrinsically periodic composites) was first proposed in the 1990s [29], their unique properties have attracted intensive research interests and provided new avenues for the manipulation of acoustic/elastic waves. Due to the Bragg scatteri...