Steering of SH wave propagation in electrorheological elastomer with a structured meta-slab by tunable phase discontinuities
The generalized Snell’s law (GSL) with phase discontinuity proposed based on the concept of a metasurface, which can be used to control arbitrarily the reflection and refraction of waves, attracts a growing attention in these years. The concept of abnormally deflecting the incident wave has been app...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
AIP Publishing LLC
2017-09-01
|
Series: | AIP Advances |
Online Access: | http://dx.doi.org/10.1063/1.4996245 |
id |
doaj-7046eefb8adc446284a039e1521b2808 |
---|---|
record_format |
Article |
spelling |
doaj-7046eefb8adc446284a039e1521b28082020-11-24T23:43:30ZengAIP Publishing LLCAIP Advances2158-32262017-09-0179095114095114-910.1063/1.4996245055709ADVSteering of SH wave propagation in electrorheological elastomer with a structured meta-slab by tunable phase discontinuitiesYanlong Xu0Yi Li1Liyun Cao2Zhichun Yang3Xiaoling Zhou4School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, ChinaSchool of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, ChinaSchool of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, ChinaSchool of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, ChinaShanghai Institute of Aerospace System Engineering, Shanghai 201109, ChinaThe generalized Snell’s law (GSL) with phase discontinuity proposed based on the concept of a metasurface, which can be used to control arbitrarily the reflection and refraction of waves, attracts a growing attention in these years. The concept of abnormally deflecting the incident wave has been applied to the elastic field very recently. However, most of the studies on metasurfaces are based on passive materials, which restricts the frequency or the deflected angles always working in a single state. Here, we steer elastic SH wave propagation in an electrorheological (ER) elastomer with a structured meta-slab composed of geometrically periodic wave guides by exposing the slab to the programmed electric fields. The dependence of phase velocities of SH waves on the applied electric fields can make the phase shift under the form of a special function along the slab, which will control the refraction angles of the transmitted SH waves by the GSL. Accordingly we design the meta-slab theoretically and conduct corresponding numerical simulations. The results demonstrate that the structured meta-slab under the programmed external electric fields can deflect SH wave flexibly with tunable refraction angles and working frequencies, and can focus SH wave with tunable focal lengths. The present study will broaden the scope of applying adaptive materials to design metasurfaces with tunability.http://dx.doi.org/10.1063/1.4996245 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yanlong Xu Yi Li Liyun Cao Zhichun Yang Xiaoling Zhou |
spellingShingle |
Yanlong Xu Yi Li Liyun Cao Zhichun Yang Xiaoling Zhou Steering of SH wave propagation in electrorheological elastomer with a structured meta-slab by tunable phase discontinuities AIP Advances |
author_facet |
Yanlong Xu Yi Li Liyun Cao Zhichun Yang Xiaoling Zhou |
author_sort |
Yanlong Xu |
title |
Steering of SH wave propagation in electrorheological elastomer with a structured meta-slab by tunable phase discontinuities |
title_short |
Steering of SH wave propagation in electrorheological elastomer with a structured meta-slab by tunable phase discontinuities |
title_full |
Steering of SH wave propagation in electrorheological elastomer with a structured meta-slab by tunable phase discontinuities |
title_fullStr |
Steering of SH wave propagation in electrorheological elastomer with a structured meta-slab by tunable phase discontinuities |
title_full_unstemmed |
Steering of SH wave propagation in electrorheological elastomer with a structured meta-slab by tunable phase discontinuities |
title_sort |
steering of sh wave propagation in electrorheological elastomer with a structured meta-slab by tunable phase discontinuities |
publisher |
AIP Publishing LLC |
series |
AIP Advances |
issn |
2158-3226 |
publishDate |
2017-09-01 |
description |
The generalized Snell’s law (GSL) with phase discontinuity proposed based on the concept of a metasurface, which can be used to control arbitrarily the reflection and refraction of waves, attracts a growing attention in these years. The concept of abnormally deflecting the incident wave has been applied to the elastic field very recently. However, most of the studies on metasurfaces are based on passive materials, which restricts the frequency or the deflected angles always working in a single state. Here, we steer elastic SH wave propagation in an electrorheological (ER) elastomer with a structured meta-slab composed of geometrically periodic wave guides by exposing the slab to the programmed electric fields. The dependence of phase velocities of SH waves on the applied electric fields can make the phase shift under the form of a special function along the slab, which will control the refraction angles of the transmitted SH waves by the GSL. Accordingly we design the meta-slab theoretically and conduct corresponding numerical simulations. The results demonstrate that the structured meta-slab under the programmed external electric fields can deflect SH wave flexibly with tunable refraction angles and working frequencies, and can focus SH wave with tunable focal lengths. The present study will broaden the scope of applying adaptive materials to design metasurfaces with tunability. |
url |
http://dx.doi.org/10.1063/1.4996245 |
work_keys_str_mv |
AT yanlongxu steeringofshwavepropagationinelectrorheologicalelastomerwithastructuredmetaslabbytunablephasediscontinuities AT yili steeringofshwavepropagationinelectrorheologicalelastomerwithastructuredmetaslabbytunablephasediscontinuities AT liyuncao steeringofshwavepropagationinelectrorheologicalelastomerwithastructuredmetaslabbytunablephasediscontinuities AT zhichunyang steeringofshwavepropagationinelectrorheologicalelastomerwithastructuredmetaslabbytunablephasediscontinuities AT xiaolingzhou steeringofshwavepropagationinelectrorheologicalelastomerwithastructuredmetaslabbytunablephasediscontinuities |
_version_ |
1725501258025926656 |