摘要
外接负电容的声子晶体具有可调的等效弹性模量。通过改变外接负电容的电容值,可改变等效介质的弹性模量。该文理论计算了等效弹性模量,结合位移矢量分析了带隙的产生原因及其影响因素。研究表明,外接负电容声子晶体具有可调的低频带隙,带隙随着外接负电容的变化而变化。
The phononic crystal with external negative capacitance has an adjustable equivalent elastic modulus.The elastic modulus of the equivalent medium can be changed by changing the capacitance value of the external negative capacitance.In this paper,the equivalent elastic modulus is calculated theoretically,and the causes and influencing factors of the band gap are analyzed by combining displacement vector.The result shows that the external negative capacitance phononic crystal has tunable low frequency band gap,and the band gap changes with the change of external negative capacitance.
作者
董亚科
姚宏
杜军
赵静波
姜久龙
DONG Yake;YAO Hong;DU Jun;ZHAO Jingbo;JIANG Jiulong(College of Eronautics Engineering,Air Force Engineering University,Xi’an 710038,China;Air Force Engineering University9Science College,Xi'an 710054,China)
出处
《压电与声光》
CAS
CSCD
北大核心
2018年第6期860-863,共4页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(11504429)
陕西省自然科学基础研究计划基金资助项目(2015JQ5155)
关键词
负电容
带隙
局域共振
数字声子晶体
negative capacitance
band gap
local resonance
digital phononic crystal
