2021
DOI: 10.48550/arxiv.2101.07028
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Abnormal topological refraction into free medium at sub-wavelength scale in valley phononic crystal plates

Linyun Yang,
Kaiping Yu,
Bernard Bonello
et al.

Abstract: In this work we propose a topological valley phononic crystal plate and we extensively investigate the refraction of valley modes into the surrounding homogeneous medium. This phononic crystal includes two sublattices of resonators (A and B) modeled by mass-spring systems. We show that two edge states confined at the AB/BA and BA/AB type domain walls exhibit different symmetries in physical space and energy peaks in the Fourier space. As a result, distinct refraction behaviors, especially through an armchair c… Show more

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