Ultrasound wave propagation in time-varying phononic crystals

Author

Wright, Derek W. ; Cobbold, Richard S C ; Yu, Alfred C H

Author_Institution

Inst. of Biomater. & Biomed. Eng., Univ. of Toronto, Toronto, ON

fYear

2008

fDate

2-5 Nov. 2008

Firstpage

1491

Lastpage

1494

Abstract

Phononic crystals demonstrate remarkable effects, but are static and unchangeable. We wish to use dynamic materials as the scatterers within phononic crystals as a means of controlling their properties. We have extended existing static phononic crystal theory to handle time-varying material parameters. The new method provides a closed-form solution to acoustic wave transmission through 1D dynamic phononic crystals. Band gap properties can be significantly altered using time-varying material parameters as the driving mechanism.

Keywords

phononic crystals; ultrasonic propagation; ultrasonic scattering; ultrasonic transmission; 1D dynamic crystal; acoustic wave transmission; closed-form solution; time-varying phononic crystal; ultrasound scattering; ultrasound wave propagation; Acoustic materials; Acoustic scattering; Biological materials; Biomedical materials; Crystalline materials; Crystals; Electromagnetic scattering; Photonic band gap; Time varying systems; Ultrasonic imaging; phononics; time-varying; wave propagation;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2008. IUS 2008. IEEE

Conference_Location

Beijing

Print_ISBN

978-1-4244-2428-3

Electronic_ISBN

978-1-4244-2480-1

Type

conf

DOI

10.1109/ULTSYM.2008.0363

Filename

4803666