TY - JOUR
T1 - Mechanically-Reconfigurable Edge States in an Ultrathin Valley-Hall Topological Metamaterial
AU - Liu, Yahong
AU - Ren, Huiling
AU - Tao, Liyun
AU - Du, Lianlian
AU - Zhou, Xin
AU - Li, Meize
AU - Song, Kun
AU - Ji, Ruonan
AU - Zhao, Xiaopeng
AU - Navarro-Cía, Miguel
N1 - Publisher Copyright:
© 2022 Wiley-VCH GmbH.
PY - 2022/9/13
Y1 - 2022/9/13
N2 - Broadband topological metamaterials hold the key for designing the next generation of integrated photonic platforms and microwave devices given their protected back-scattering-free and unidirectional edge states, among other exotic properties. However, synthesizing such metamaterial has proven challenging. Here, a broadband bandgap (relative bandwidth of more than 43%) Valley-Hall topological metamaterial with deep subwavelength thickness is proposed. The present topological metamaterial is composed of three layers printed circuit boards whose total thickness is 1.524 mm ≈ λ/100. The topological phase transition is achieved by introducing an asymmetry parameter δr. Three mechanically reconfigurable edge states can be obtained by varying interlayer displacement. Their robust transmission is demonstrated through two kinds of waveguide domain walls with cavities and disorders. Exploiting the proposed topological metamaterial, a six-way power divider is constructed and measured as a proof-of-concept of the potential of the proposed technology for future electromagnetic devices.
AB - Broadband topological metamaterials hold the key for designing the next generation of integrated photonic platforms and microwave devices given their protected back-scattering-free and unidirectional edge states, among other exotic properties. However, synthesizing such metamaterial has proven challenging. Here, a broadband bandgap (relative bandwidth of more than 43%) Valley-Hall topological metamaterial with deep subwavelength thickness is proposed. The present topological metamaterial is composed of three layers printed circuit boards whose total thickness is 1.524 mm ≈ λ/100. The topological phase transition is achieved by introducing an asymmetry parameter δr. Three mechanically reconfigurable edge states can be obtained by varying interlayer displacement. Their robust transmission is demonstrated through two kinds of waveguide domain walls with cavities and disorders. Exploiting the proposed topological metamaterial, a six-way power divider is constructed and measured as a proof-of-concept of the potential of the proposed technology for future electromagnetic devices.
KW - edge state
KW - reconfigurable topological edge states
KW - robust transmission of waveguide
KW - topological metamaterials
KW - topological phase transition
UR - http://www.scopus.com/inward/record.url?scp=85135902817&partnerID=8YFLogxK
U2 - 10.1002/admi.202200998
DO - 10.1002/admi.202200998
M3 - 文章
AN - SCOPUS:85135902817
SN - 2196-7350
VL - 9
JO - Advanced Materials Interfaces
JF - Advanced Materials Interfaces
IS - 26
M1 - 2200998
ER -