Two-dimensional phononic crystal sensor based on a cavity mode

被引:131
作者
Lucklum, Ralf [1 ]
Ke, Manzhu [2 ]
Zubtsov, Mikhail
机构
[1] Univ Magdeburg, Inst Micro & Sensor Syst IMOS, Dept Elect Engn, D-39106 Magdeburg, Germany
[2] Wuhan Univ, Dept Phys, Wuhan, Peoples R China
关键词
Phononic crystal sensor; Ultrasonic sensor; Liquid sensor; REFRACTIVE-INDEX; ACOUSTIC-WAVES; BAND-STRUCTURE; GAPS;
D O I
10.1016/j.snb.2012.03.063
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Phononic crystals offer an innovative platform for acoustic liquid sensors. Based on a longitudinal cavity mode, we introduce an acoustic sensor system using a two dimensional phononic crystal with in-plane wave incidence. The phononic crystal is made up of a steel plate having two regular arrays of holes and a cavity in-between. The holes and the cavity are filled with the liquid of interest. We both theoretically and experimentally demonstrate that the transmission peak caused by the cavity mode can be used for sensor purpose. Theoretical simulation and experimental measurement show good consistency in the response of the transmission peak frequency. This frequency is primarily sensitive to the speed of sound thereby sensitive to the composition of the liquid mixture. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:271 / 277
页数:7
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