scholarly journals Membrane-enhanced surface acoustic wave analysis of grafted polymer brushes

2008 ◽  
Vol 103 (7) ◽  
pp. 073517 ◽  
Author(s):  
David A. Brass ◽  
Kenneth R. Shull
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Polymer Brushes ◽  
Wave Analysis ◽  
Grafted Polymer ◽  
Enhanced Surface

scholarly journals Full-Wave Analysis of Ultrahigh Electromechanical Coupling Surface Acoustic Wave Propagating Properties in a Relaxor Based Ferroelectric Single Crystal/Cubic Silicon Carbide Layered Structure

2017 ◽  
Vol 2017 ◽  
pp. 1-6
Author(s):  
Xiaojun Ji ◽  
Qiang Xiao ◽  
Jing Chen
Keyword(s):  
Silicon Carbide ◽  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Electromechanical Coupling ◽  
Structural Parameters ◽  
Coupling Factor ◽  
Wave Analysis ◽  
Full Wave ◽  
Full Wave Analysis ◽  
Cubic Silicon Carbide

This paper describes a full-wave analysis of ultrahigh electromechanical coupling surface acoustic wave (SAW) of Y-cut X propagating Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 (YX-PIMNT) single crystals on a cubic silicon carbide (3C-SiC) substrate. There are several eigenmodes including shear horizontal (SH) and Rayleigh SAWs. Based on the finite-element method (FEM), the phase velocity (vp) and coupling factor (K2) of SAWs varying with the top electrode thickness, thickness, and Euler angle (θ) of the YX-PIMNT substrate have been investigated. K2 of SH SAW can reach an extremely high value of 75.9%. The proper control of structural parameters can suppress unwanted responses caused by other modes without deteriorating the coupling factor. The large K2 value of SH SAW and suppression of unwanted responses have highly promising applications in developing ultrawideband and tunable SAW filters. Finally, the performance of 3C-SiC and 6H-SiC as substrates was investigated, and 3C-SiC was identified as a more attractive substrate candidate than 6H-SiC.

scholarly journals Hybrid Full-Wave Analysis of Surface Acoustic Wave Devices for Accuracy and Fast Performance Prediction

Micromachines ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 5
Author(s):  
Zhenglin Chen ◽  
Qiaozhen Zhang ◽  
Sulei Fu ◽  
Xiaoyu Wang ◽  
Xiaojun Qiu ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Graphics Processing Unit ◽  
Comsol Multiphysics ◽  
Processing Unit ◽  
Wave Analysis ◽  
High Frequency Structure Simulator ◽  
Full Wave ◽  
Full Wave Analysis ◽  
Acoustic Wave Devices

In this paper, a hybrid full-wave analysis of surface acoustic wave (SAW) devices is proposed to achieve accurate and fast simulation. The partial differential equation (PDE) models of the physical system in question and graphics processing unit (GPU)-assisted hierarchical cascading technology (HCT) are used to calculate acoustic-electric characteristics of a SAW filter. The practical solid model of the radio frequency (RF) filter package is constructed in High Frequency Structure Simulator (HFSS) software and the parasitic electromagnetics of the entire package is considered in the design process. The PDE-based models of the two-dimensional finite element method (2D-FEM) are derived in detail and solved by the PDE module embedded in COMSOL Multiphysics. Due to the advantages of PDE-based 2D-FEM, it is universal, efficient and not restricted to handling arbitrary materials and crystal cuts, electrode shapes, and multi-layered substrate. Combining COMSOL Multiphysics with a user-friendly interface, a flexible way of modeling and mesh generation, it can greatly reduce the complicated process of modeling and physical properties definition. Based on a hybrid full-wave analysis, we present an example application of this approach on a TC-SAW ladder filter with 5° YX-cut LiNbO3 substrate. Numerical results and measurements were calculated for comparison, and the accuracy and efficiency of the proposed method were verified.

Nondestructive characterization of dielectric stack structures by laser-pulse-generated surface acoustic wave analysis

2006 ◽  
Author(s):  
Toshinori Takimura ◽  
Nobuhiro Hata ◽  
Yoshinori Shishida ◽  
Shinichi Chikaki ◽  
Takamaro Kikkawa
Keyword(s):  
Laser Pulse ◽  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Wave Analysis ◽  
Nondestructive Characterization

scholarly journals High humidity enhanced surface acoustic wave (SAW) H2S sensors based on sol–gel CuO films

2019 ◽  
Vol 294 ◽  
pp. 55-61 ◽  
Author(s):  
Dengji Li ◽  
Xiaotao Zu ◽  
Dongyi Ao ◽  
Qingbo Tang ◽  
YongQing Fu ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Sol Gel ◽  
High Humidity ◽  
Enhanced Surface

X-ray diffraction and surface acoustic wave analysis of BST/Pt/TiO2/SiO2/Si thin films

2011 ◽  
Vol 110 (10) ◽  
pp. 104506 ◽  
Author(s):  
Souhir Mseddi ◽  
Anouar Njeh ◽  
Dieter Schneider ◽  
Hartmut Fuess ◽  
Mohamed Hédi Ben Ghozlen
Keyword(s):  
Thin Films ◽  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Wave Analysis ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Enhanced surface acoustic wave cell sorting by 3D microfluidic-chip design

Lab on a Chip ◽  
2017 ◽  
Vol 17 (23) ◽  
pp. 4059-4069 ◽  
Author(s):  
W. L. Ung ◽  
K. Mutafopulos ◽  
P. Spink ◽  
R. W. Rambach ◽  
T. Franke ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Microfluidic Chip ◽  
Cell Sorting ◽  
Device Fabrication ◽  
Wave Excitation ◽  
Planar Surface ◽  
Chip Design ◽  
Cell Sorter ◽  
Enhanced Surface

We demonstrate an acoustic wave driven microfluidic cell sorter that combines advantages of multilayer device fabrication with planar surface acoustic wave excitation.

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