Acoustic topological insulator based on phononic crystals

Yuanchen Deng, Yun Jing

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Quantum Spin Hall Effects(QSHE) underpins most of the design in topological insulators. The intrinsic spin-0 of the phononics, yet, continue to be the main barrier in designing acoustic topological insulators. Previous research proposed a solution using external fields such as clockwise and counter-clockwise circulating fluids to create artificial acoustic spin-1/2 states. Most recently, several papers provided ideas based on forming two pairs of degenerate Bloch modes in phononic crystals by tuning the filling factor of the honeycomb lattice. In this work, we introduce a new way to form a phononic double Dirac cone based on the idea of 'zone folding'. By simple modifications of the geometry, topological protected bulk band gaps can be opened and a helical edge channel can be realized.

Original languageEnglish (US)
Title of host publication2017 IEEE International Ultrasonics Symposium, IUS 2017
PublisherIEEE Computer Society
ISBN (Electronic)9781538633830
DOIs
StatePublished - Oct 31 2017
Event2017 IEEE International Ultrasonics Symposium, IUS 2017 - Washington, United States
Duration: Sep 6 2017Sep 9 2017

Publication series

NameIEEE International Ultrasonics Symposium, IUS
ISSN (Print)1948-5719
ISSN (Electronic)1948-5727

Other

Other2017 IEEE International Ultrasonics Symposium, IUS 2017
CountryUnited States
CityWashington
Period9/6/179/9/17

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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  • Cite this

    Deng, Y., & Jing, Y. (2017). Acoustic topological insulator based on phononic crystals. In 2017 IEEE International Ultrasonics Symposium, IUS 2017 [8092335] (IEEE International Ultrasonics Symposium, IUS). IEEE Computer Society. https://doi.org/10.1109/ULTSYM.2017.8092335