Valley-projected edge modes observed in underwater sonic crystals

被引：54

作者：

Shen, Yuanyuan ^{[1
,2
]}

Qiu, Chunyin ^{[1
,2
]}

Cai, Xiangxi ^{[1
,2
]}

Ye, Liping ^{[1
,2
]}

Lu, Jiuyang ^{[3
]}

Ke, Manzhu ^{[1
,2
]}

Liu, Zhengyou ^{[1
,2
,4
]}

机构：

[1] Wuhan Univ, Minist Educ, Key Lab Artificial Micro & Nanostruct, Wuhan 430072, Hubei, Peoples R China

[2] Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Hubei, Peoples R China

[3] South China Univ Technol, Sch Phys & Optoelect Technol, Guangzhou 510640, Guangdong, Peoples R China

[4] Wuhan Univ, Inst Adv Studies, Wuhan 430072, Hubei, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2019年 / 114卷 / 02期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

Number: 11534013,11674250,11747310,11774275, Acronym: NSFC, Sponsor: National Natural Science Foundation of China, Number: 2017CFA042, Acronym: -, Sponsor: Natural Science Foundation of Hubei Province, Number: 2015CB755500,2018FYA0305800, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China,;

D O I：

10.1063/1.5049856

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Here, we report an experimental study on the valley-projected edge states for underwater sound, which propagates along the interface separating two topologically distinct acoustic valley Hall insulators. The topological edge states are directly observed in our ultrasound scanning experiments, together with a solid evidence for the valley-selective excitation. Furthermore, we demonstrate an intriguing sound splitter built by topologically different acoustic valley Hall insulators. All experimental data agree well with our numerical results. Prospective applications can be anticipated, such as for underwater sound signal processing and ocean noise control.

引用

页数：5

共 40 条

[1] Quantum spin Hall effect and topological phase transition in HgTe quantum wells [J].