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Updated: Mar 13, 2026
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
A highly sensitive compact liquid sensor based on slotted phononic crystal plates
Chen Wang1, Feiyan Cai2, Fei Li3
1Sino-Dutch Biomedical and Information Engineering School, Northeastern University, Shenyang 110819, China. kangy@neusoft.com and Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China. fy.cai@siat.ac.cn.
Abstract:
Liquid sensing is achieved by using slotted phononic crystal plates (SPCP). The sensing mechanism is based on the fact that an acoustic wave confined in a small liquid slot intensively interacts with the liquid sample in the slot, and the acoustic energy flux transmission spectrum of the SPCP system strongly depends on the acoustic properties of the liquid in the slot. Consequently, the resonance frequency of the sensing system varies with the density and sound velocity of the liquid sample. Compared with the traditional Lamb wave sensor, the SPCP sensor exhibits a higher sensitivity and requires a minimal amount of liquid sample. These attractive advantages may allow the SPCP liquid sensor to be easily integrated into a chip for broad lab-on-chip biochemical sensing applications.
