%0 Journal Article
%T Properties study of LiNbO3 lateral field excited device working on thickness extension mode<br>
%A Zhang Zhi-Tian
%A Zhang Chao
%A Wang Wen-Yan
%A Ma Ting-Feng
%A Liu Yan
%A Feng Guan-Ping
%A <br>
%J 中国物理 B
%D 2010
%I 
%X This paper investigates the properties of thickness extension mode excited by lateral electric field on LiNbO3 by using the extended Christoffel--Bechmann method. It finds that the lateral field excitation coupling factor for a-mode (quasi-extensional mode) reaches its maximum value of 28% on X-cut LiNbO3. The characteristics of a lateral field excitation device made of X-cut LiNbO3 have been investigated and the lateral field excitation device is used for the design of a high frequency ultrasonic transducer. The time and frequency domain pulse/echo response of the LiNbO3 lateral field excitation ultrasonic transducer is analysed with the modified Krimholtz--Leedom--Matthae model and tested using traditional pulse/echo method. A LiNbO3 lateral field excitation ultrasonic transducer with the centre frequency of 33.44 MHz and the --6 dB bandwidth of 33.8% is acquired, which is in good agreement with the results of the Krimholtz--Leedom--Matthae model. Further analysis suggests that the LiNbO3 lateral field excitation device has great potential in the design of broadband high frequency ultrasonic transducers.
%K lateral field excitation
%K high frequency ultrasonic transducer
%K LiNbO3
%K thickness extension mode<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=AC330F7B0E7A94BAEE25D0252B88B939&yid=140ECF96957D60B2&vid=2A8D03AD8076A2E3&iid=9CF7A0430CBB2DFD&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=15