Volume 114, Number 4, May 2016
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||20 June 2016|
Coalescence towards exceptional contours in synthetic phononic media
Department of Photonics Engineering, Technical University of Denmark - DK-2800 Kgs. Lyngby, Denmark
Received: 5 April 2016
Accepted: 30 May 2016
Parity-time symmetric media, also referred to as synthetic media, have been devised in many optical systems with the ground breaking potential to create non-reciprocal structures and one-way cloaks of invisibility. Here we demonstrate a feasible approach for the case of sound where gain and loss are induced via the acousto-electric effect in electrically biased piezoelectric semiconductors. We study how wave attenuation and amplification can be tuned, and when combined, can give rise to phononic synthetic media with unidirectional suppressed reflectance, a feature directly applicable to evading sonar detections.
PACS: 77.55.hf – ZnO / 77.65.Dq – Acoustoelectric effects and surface acoustic waves (SAW) in piezoelectrics / 11.30.Er – Charge conjugation, parity, time reversal, and other discrete symmetries
© EPLA, 2016
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.