Surface acoustic waves in periodic structures

1979 ◽  
Vol 50 (5) ◽  
pp. 3370-3375 ◽  
Author(s):  
Supriyo Datta ◽  
Bill J. Hunsinger
Keyword(s):  
Acoustic Waves ◽  
Periodic Structures ◽  
Surface Acoustic Waves

Propagation of Surface Acoustic Waves in two-dimensional periodic structures

2011 ◽  
Author(s):  
S. A. Nikitov ◽  
V. I. Gigorievskii ◽  
I. M. Kotelyanskii ◽  
S. G. Suchkov ◽  
E. N. Mirgorodskaya ◽  
...  
Keyword(s):  
Acoustic Waves ◽  
Periodic Structures ◽  
Surface Acoustic Waves ◽  
Two Dimensional

Scanning phononic lattices with surface acoustic waves

2005 ◽  
Vol 220 (9-10) ◽  
Author(s):  
Robert E. Vines ◽  
James P. Wolfe
Keyword(s):  
Elastic Properties ◽  
Acoustic Waves ◽  
Periodic Structures ◽  
Water Immersion ◽  
Surface Acoustic Waves ◽  
Hexagonal Lattice ◽  
Sample Surface ◽  
Simple Method ◽  
Transverse Waves ◽  
Basic Features

AbstractWe have examined the propagation of surface acoustic waves across structures with periodically varying elastic properties. These so-called phononic lattices include a) alternating layers of aluminum and polymer in a multilayer structure, b) a 2-d hexagonal lattice of holes drilled in an aluminum substrate and filled with polymer, and c) a 2-d hexagonal array of Al posts surrounded by polymer. A simple method is employed for probing the elastic properties of these periodic structures with ultrasound in the 0.5–5 MHz range. Ultrasonic surface waves are introduced and detected by water-immersion transducers, cylindrically focused to a line on the sample surface. Transmission and reflection patterns are observed by continuously scanning the wavevector angle with respect to the symmetry axes of the lattice. By Fourier transforming the transmitted signals using a broadband source, we obtain the frequency responses of the lattices as a function of propagation angle. Phononic band gaps, waveguide channeling and Scholte-like interface modes are observed. The results are compared to models of the propagation of transverse waves through analogous bulk structures, for which theories are available. These preliminary models explain the basic features of the experimental results, such as frequency gaps and wave channeling. A number of observations, however, remain to be explained. The angle-scanning technique provides a powerful probe of these modulated structures.

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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