TITLE

Surface acoustic waves on a sphere with divergent, focusing, and collimating beam shapes excited by an interdigital transducer

AUTHOR(S)
Satoru Ishikawa; Noritaka Nakaso, R.; Nobuo Takeda, R.; Tsuyoshi Mihara, R.; Yusuke Tsukahara, R.; Kazushi Yamanaka, R.
PUB. DATE
December 2003
SOURCE
Applied Physics Letters;12/1/2003, Vol. 83 Issue 22, p4649
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The surface acoustic wave (SAW) device on a ball is expected to provide high-performance sensors. Since we must deal with three-dimensional wave fields for precise design of ball SAW devices, numerical methods, such as the finite element method, will require too many elements. Therefore, we applied an analytical solution to a practical calculation of the full-field acoustic waves. For an IDT aperture of 6° and 80° with a wave number parameter of 45, the SAW has a divergent beam and a focusing beam, respectively. For an intermediate aperture of 30°, the SAW forms a collimating beam. This calculation confirmed the possibility of an extremely sensitive sensor with diffraction-free SAWs without disturbance by spurious bulk waves. © 2003 American Institute of Physics.
ACCESSION #
11503282

 

Related Articles

  • Resonant Frequency Characteristics of a SAW Device Attached to Resonating Micropillars. Ramakrishnan, N.; Nemade, Harshal B.; Palathinkal, Roy Paily // Sensors (14248220);2012, Vol. 12 Issue 4, p3789 

    Recently we reported experimental and simulation results on an increase in resonance frequency of a SAW resonator caused by mass loading of micropillars made of SU-8, attached normal to the surface of the resonator. We concluded that SAW resonator and the SU-8 micropillars in unison form a...

  • Surface Acoustic Wave Gas Sensor of the Sorption Type Sensitive to the Thermal Properties of Gases. Kryshtal, R. G.; Kundin, A. P.; Medved, A. V.; Shemet, V. V. // Technical Physics Letters;Jan2002, Vol. 28 Issue 1, p50 

    The basic principles of a new surface acoustic wave (SAW) gas sensor are described. Being essentially a sensor of the sorption type, the proposed device possesses certain features of the thermometric SAW sensors and is not only sensitive to the vapors of volatile substances, but capable of...

  • An automated system for testing surface acoustic wave gas sensors. Nederlof, A. J.; Nieuwenhuizen, M. S. // Review of Scientific Instruments;Feb1993, Vol. 64 Issue 2, p501 

    An automated, reliable, and safe system for the unattended and safe testing surface acoustic wave (SAW) gas sensors has been developed. The system includes the possibility to generate and/or dilute almost any gas or vapor and can easily be adapted for testing sensors or equipment other than SAW...

  • Automated high quality isosurface modeling technique for iterative two-phase problems. Che-Cheng Chang; Qing Li // Applied Mechanics & Materials;2014, Issue 553, p818 

    While smooth isosurface and the subsequent body mesh construction is a well-developed modeling technique and widely used in medical imaging and engineering modeling, it is rarely performed in transient analysis and other iterative procedures due to relatively high computational cost. Voxelized...

  • Shear-horizontal surface acoustic wave phononic device with high density filling material for ultra-low power sensing applications. Richardson, M.; Sankaranarayanan, S. K. R. S.; Bhethanabotla, V. R. // Applied Physics Letters;6/23/2014, Vol. 104 Issue 25, p1 

    Finite element simulations of a phononic shear-horizontal surface acoustic wave (SAW) sensor based on ST 90°-X Quartz reveal a dramatic reduction in power consumption. The phononic sensor is realized by artificially structuring the delay path to form an acoustic meta-material comprised of a...

  • AlN/ZnO/diamond structure combining isolated and surface acoustic waves. Elmazria, Omar; Zhgoon, Sergei; Le Brizoual, Laurent; Sarry, Frédéric; Tsimbal, Dmitry; Djouadi, Mohammed Abdou // Applied Physics Letters;12/7/2009, Vol. 95 Issue 23, p233503 

    In order to generate surface acoustic waves (SAW) and waveguiding layer acoustic waves (WLAW) simultaneously, a multilayer structure of AlN/ZnO/diamond has been proposed. This structure has been investigated theoretically (two-dimensional finite element method) and experimentally. The nature of...

  • Low-loss unidirectional transducer for high frequency surface acoustic wave devices. Biryukov, S. V.; Martin, G.; Schmidt, H.; Wall, B. // Journal of Applied Physics;Oct2011, Vol. 110 Issue 7, p076103 

    A multi-track unidirectional transducer for surface acoustic wave devices is presented. This transducer consists of periodic cells containing in each of the multiple tracks, only two electrodes and two gaps with quarter period width. So the structure has maximal possible dimensions of its...

  • Acousto-optic surface-plasmon resonance measurements of thin films on gold. Jory, Michael J.; Caruso, Frank; Bradberry, Geoffrey W.; Sambles, J. Roy; Furlong, D. Neil // Journal of Applied Physics;1/15/1998, Vol. 83 Issue 2, p1023 

    Examines the optical technique of acousto-optic surface resonance measurement of thin films on gold from water, in situ and in real-time. Examination of the purification techniques used on mondisperse octaethylene glycol mondodecyl ether; Information on the change in normalized reflectivity;...

  • Acoustic waves extend exciton lifetimes. Lewotsky, Kristin // Laser Focus World;Jul97, Vol. 33 Issue 7, p48 

    Reports on the splitting of optical excitons achieved by researchers of the University of Munich. Use of elliptically polarized surface acoustic waves (SAW); Propagation of electron-hole pairs at the speed of sound prior to photoluminescence; Potential in selection of optical storage time by...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics