Full electrical characterization of aperiodic acoustic gratings by an enhanced /spl delta/-function model: theory and experiment

Author

Gnewuch, Harald ; Zayer, Nadhum K. ; Pannell, Christopher N.

Author_Institution

Sch. of Phys. Sci., Kent Univ., Canterbury, UK

Volume

48

Issue

6

fYear

2001

Firstpage

1527

Lastpage

1531

Abstract

We derive the admittance of an aperiodic one-dimensional acoustic grating with acoustically matched boundaries using an enhanced /spl delta/-function model combined with the Green\´s function approach. The expression obtained is compared with the classical /spl delta/-function model and with electric back reflection measurements on a linearly chirped bulk acoustic grating with matched boundaries formed in LiNbO/sub 3/ by domain inversion and excited in "crossed-field" scheme. The agreement between calculated and measured results is excellent.

Keywords

Green´s function methods; acoustoelectric devices; bulk acoustic wave devices; chirp modulation; electric admittance; electric domains; ferroelectric devices; lithium compounds; /spl delta/-function model; Green function; LiNbO/sub 3/; LiNbO/sub 3/ ferroelectric crystal; acoustically matched boundaries; aperiodic one-dimensional acoustic grating; crossed-field excitation; domain inversion; electric back reflection; electrical admittance; linearly chirped bulk acoustic grating; Acoustic measurements; Acoustic reflection; Acoustic waves; Chirp; Electrodes; Ferroelectric materials; Gratings; Optical filters; Optical reflection; Polarization;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.971703

Filename

971703