High-performance guided-wave acoustooptic scanning devices using multiple surface acoustic waves

1976 ◽  
Vol 64 (5) ◽  
pp. 788-793 ◽  
Author(s):  
B. Kim ◽  
C.S. Tsai
Keyword(s):  
Acoustic Waves ◽  
High Performance ◽  
Surface Acoustic Waves ◽  
Guided Wave

scholarly journals Nanostructure-Enhanced Surface Acoustic Waves Biosensor and Its Computational Modeling

2009 ◽  
Vol 2009 ◽  
pp. 1-11 ◽  
Author(s):  
Guigen Zhang
Keyword(s):  
Acoustic Waves ◽  
High Performance ◽  
Surface Acoustic Waves ◽  
Active Surface ◽  
Underlying Mechanism ◽  
Saw Sensor ◽  
Saw Devices ◽  
Operational Capabilities ◽  
Sensing Platform ◽  
Enhanced Surface

Surface acoustic wave (SAW) devices are considered to be very promising in providing a high-performance sensing platform with wireless and remote operational capabilities. In this review, the basic principles of SAW devices and Love-mode SAW-based biosensors are discussed first to illustrate the need for surface enhancement for the active area of a SAW sensor. Then some of the recent efforts made to incorporate nanostructures into SAW sensors are summarized. After that, a computational approach to elucidate the underlying mechanism for the operations of a Love-mode SAW biosensor with nanostructured active surface is discussed. Finally, a modeling example for a Love-mode SAW sensor with skyscraper nanopillars added to in its active surface along with some selected results is presented.

BULK AND SURFACE ACOUSTIC WAVES IN ANISOTROPIC SOLIDS

2000 ◽  
Vol 10 (03) ◽  
pp. 653-684 ◽  
Author(s):  
ERIC L. ADLER
Keyword(s):  
Acoustic Wave ◽  
Boundary Conditions ◽  
Surface Acoustic Wave ◽  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
Guided Wave ◽  
Symmetry Properties ◽  
Interface Boundary Conditions ◽  
Matrix Differential ◽  
The Individual

In this paper methods for analyzing acoustic propagation characteristics for bulk and surface acoustic waves in anisotropic piezoelectric multilayers are described. The methods's conceptual usefulness is demonstrated by examples showing how problems of guided wave propagation in complicated layered surface acoustic wave device geometries are simplified. The formulation reduces the acoustoelectric equations to a first order ordinary matrix differential equation in the variables that must be continuous across interfaces. The solution to these equations is a transmission matrix that maps the variables from one layer face to the other. Interface boundary conditions for a planar multilayer are automatically satisfied by multiplying the individual transmission matrices in the appropriate order thus reducing the problem to imposing boundary conditions appropriate to the remaining free surface. The dimensionality of the problem being independent of the number of layers is a significant advantage. A classification scheme for reducing problem dimensionality, based on an understanding of crystal symmetry properties, further simplifies surface acoustic wave problems.

Modeling Development of a High-Sensitivity Escherichia coli O157:H7 Detection Based on SH SAW Sensor

2014 ◽  
Vol 925 ◽  
pp. 595-599
Author(s):  
Seng Teik Ten ◽  
Uda Hashim ◽  
Ahmad Sudin ◽  
Wei Wen Liu ◽  
Kai Loong Foo ◽  
...  
Keyword(s):  
Acoustic Waves ◽  
High Performance ◽  
Surface Acoustic Waves ◽  
Equivalent Circuit Model ◽  
High Sensitivity ◽  
Theoretical Models ◽  
Acoustic Energy ◽  
Sensitive Detection ◽  
Label Free ◽  
Element Analysis

Surface acoustic waves based devices were initially developed for the telecommunication purpose such as signal filters and resonators. The acoustic energy is strongly confined on the surface of the surface acoustic waves (SAW) based devices and consequent their ultra-sensitivity to the surface perturbation. This has made SAW permits the highly sensitive detection of utterly diminutive charges on the surface. Hence, SAW based devices have been modified to be sensors. Food contamination has become critical issue and sensitive detection devices are needed urgently as small amount of harmful bacterial pathogens such as Escherichia coli (E.coli) O157:H7with the dose fewer than 100 organisms in food products or water is enough to cause serious gastrointestinal illness to human. Therefore, ultra-high sensitive, label free biosensors have been designed in this research for the low concentration E.coli detection. After the saturated development in telecommunication filed, SAW sensors were developed for gas detections and have been moving towards biological detections recently. Shear horizontal surface acoustic wave (SHSAW), one of the SAW based types is most suitable for the liquid based application as it has the advantage of acoustic energy is not being radiated into liquid. Therefore, SHSAW device has the potential to provide high-performance sensing platform in this research. There have been a lot of complicated theoretical models for the SAW devices development since 1960 as signal filters and resonators such as from delta function model, equivalent circuit model, to the current SAW models such as coupling-of-modes (COM) model, P-matrix model and finite element analysis (FEA) model. However, SHSAW device in this research is not meant for signal filter or resonators but used for surface sensing purpose, therefore the simplicity method of the modeling is presented in the paper for the E.coli detection sensor development.

Wideband guided - Wave acoustooptic Bragg devices using multiple tilting surface acoustic waves

1975 ◽  
Vol 11 (9) ◽  
pp. 832-832 ◽  
Author(s):  
C. Tsai ◽  
M. Alhaider ◽  
L.T. Nguyen ◽  
B. Kim
Keyword(s):  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
Guided Wave

High−performance acousto−optic guided−light−beam device using two tilting surface acoustic waves

1975 ◽  
Vol 26 (4) ◽  
pp. 140-142 ◽  
Author(s):  
C. S. Tsai ◽  
Le T. Nguyen ◽  
S. K. Yao ◽  
M. A. Alhaider
Keyword(s):  
Light Beam ◽  
Acoustic Waves ◽  
High Performance ◽  
Surface Acoustic Waves

Characterization of RF Sputtered ZnO Piezoelectric Films Using Transmission Electron Microscope

1975 ◽  
Vol 33 ◽  
pp. 86-87
Author(s):  
Kemining W. Yeh ◽  
Richard S. Muller ◽  
Wei-Kuo Wu ◽  
Jack Washburn
Keyword(s):  
Integrated Circuit ◽  
Acoustic Waves ◽  
New Technology ◽  
Surface Acoustic Waves ◽  
Electromechanical Properties ◽  
Leading Role ◽  
Saw Devices ◽  
Transmission Electron ◽  
High Degree

Considerable and continuing interest has been shown in the thin film transducer fabrication for surface acoustic waves (SAW) in the past few years. Due to the high degree of miniaturization, compatibility with silicon integrated circuit technology, simplicity and ease of design, this new technology has played an important role in the design of new devices for communications and signal processing. Among the commonly used piezoelectric thin films, ZnO generally yields superior electromechanical properties and is expected to play a leading role in the development of SAW devices.

Attenuation of surface acoustic waves by quantum dots

1998 ◽  
Vol 77 (5) ◽  
pp. 1195-1202
Author(s):  
Andreas Knabchen Yehoshua, B. Levinson, Ora
Keyword(s):  
Quantum Dots ◽  
Acoustic Waves ◽  
Surface Acoustic Waves
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