Fundamental frequency degeneracy of standing surface acoustic waves under metallic gratings on piezoelectric substrates

2002 ◽  
Vol 112 (5) ◽  
pp. 2003-2013 ◽  
Author(s):  
A. N. Darinskii ◽  
S. V. Biryukov ◽  
M. Weihnacht
Keyword(s):  
Fundamental Frequency ◽  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
Metallic Gratings

scholarly journals Preliminary Exploration of Cell-Based SAW Detection for Water Toxicity

2018 ◽  
Author(s):  
Kun-Lin Lee ◽  
Fang Li ◽  
Anis Nurashikin Nordin ◽  
Ioana Voiculescu
Keyword(s):  
Fundamental Frequency ◽  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
Phase Cell ◽  
Sh Wave ◽  
Liquid Environment ◽  
Sensing Applications ◽  
Surface Sensing ◽  
Water Based ◽  
Theoretical Fundamental

Nowadays, many surface sensing mechanisms exist, not all of them can be applied in water-based environment. Most of surface sensing techniques were developed in air-based environment. In order to obtain a potential cell-based biosensor, the sensing method needs to be reliable and repeatable in liquid environment. Therefore, we adapt existing air-based surface acoustic sensor and promote the technology into water-based applications. The goal of this study is to apply surface acoustic waves (SAW) for water-based environment sensing. We will use shear horizontal wave (SH wave) as surface sensing mechanism. SH wave is a type of surface acoustic waves (SAW) which can be used for weight/mass sensing in the air environment. Interdigitated transducers (IDTs) induce the deformation of an ST-cut quartz crystal substrate in AC source and generate waves. With a thin layer of polymer like Parylene and polyimide, the SH wave will be confined between the interface of substrate and polymer layer without suffering the energy loss due to the liquid damping from above. The fundamental frequency of the SAW device is defined by the spacing between the electrodes of IDT. The frequency of interests for this research is below 100 MHz in water-based environment. Due to the stable frequency characteristics of ST-cut quartz in room temperature, this SAW device can be a good candidate for field applications. From an early IDTs design, investigation in material and IDTs configuration is necessary to improve signal quality in order to qualify for liquid phase cell-based bio-sensing applications. A simplified 3D unit cell FEM model is created to study the thickness effects of wave-guide and electrodes. Boundary conditions and assumptions are discussed in the modeling. The simulated eigenfrequency of SH mode is close to the theoretical fundamental frequency of the 64μm wavelength IDTs. The mass damping effects from gold electrodes is more significant than aluminum electrodes.

Analysis of Surface Acoustic Waves Obliquely Propagating under Metallic Gratings with Finite Thickness

1996 ◽  
Vol 35 (Part 1, No. 5B) ◽  
pp. 3006-3009 ◽  
Author(s):  
Ken-ya Hashimoto ◽  
Goh Endoh ◽  
Makoto Ohmaru ◽  
Masatsune Yamaguchi
Keyword(s):  
Acoustic Waves ◽  
Finite Thickness ◽  
Surface Acoustic Waves ◽  
Metallic Gratings

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

Brillouin light scattering from surface acoustic waves in photonic microwires

2014 ◽  
Author(s):  
Jean-Charles Beugnot ◽  
Sylvie Lebrun ◽  
Gilles Pauliat ◽  
Vincent Laude ◽  
Thibaut Sylvestre
Keyword(s):  
Light Scattering ◽  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
Brillouin Light Scattering

Surface acoustic waves (SAW) interaction with 2DES at spin-splitted Landau levels

2000 ◽  
Vol 284-288 ◽  
pp. 1732-1733
Author(s):  
Irina L Drichko ◽  
Andrey M Diakonov ◽  
Valery V Preobrazenskii ◽  
Ivan Yu Smirnov ◽  
Alexandr I Toropov
Keyword(s):  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
Landau Levels
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