中国物理B ›› 2017, Vol. 26 ›› Issue (7): 74302-074302.doi: 10.1088/1674-1056/26/7/074302

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Acoustic-electromagnetic slow waves in a periodical defective piezoelectric slab

Xiao-juan Li(李小娟), Huan Ge(葛欢), Li Fan(范理), Shu-yi Zhang(张淑仪), Hui Zhang(张辉), Jin Ding(丁劲)   

  1. Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093, China
  • 收稿日期:2017-01-22 修回日期:2017-03-01 出版日期:2017-07-05 发布日期:2017-07-05
  • 通讯作者: Li Fan E-mail:fanli@nju.edu.cn
  • 基金资助:

    Project supported by the National Basic Research Program of China (Grant No.2012CB921504),the National Natural Science Foundation of China (Grant Nos.11374154,10904067,and 11174142),the Natural Science Foundation of Jiangsu Province of China (Grant No.BK20151375),and the Special Fund for Research in Quality Inspection of Public Welfare Industry,China (Grant No.201510068).

Acoustic-electromagnetic slow waves in a periodical defective piezoelectric slab

Xiao-juan Li(李小娟), Huan Ge(葛欢), Li Fan(范理), Shu-yi Zhang(张淑仪), Hui Zhang(张辉), Jin Ding(丁劲)   

  1. Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093, China
  • Received:2017-01-22 Revised:2017-03-01 Online:2017-07-05 Published:2017-07-05
  • Contact: Li Fan E-mail:fanli@nju.edu.cn
  • Supported by:

    Project supported by the National Basic Research Program of China (Grant No.2012CB921504),the National Natural Science Foundation of China (Grant Nos.11374154,10904067,and 11174142),the Natural Science Foundation of Jiangsu Province of China (Grant No.BK20151375),and the Special Fund for Research in Quality Inspection of Public Welfare Industry,China (Grant No.201510068).

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摘要：

Coupled slow waves, slow acoustic waves, and electromagnetic waves are simultaneously achieved based on a piezoelectric material, in which a line defect is created within a honeycomb lattice array of cylindrical holes etched in a LiNbO3 slab. Finite element simulations in frequency domain and time domain demonstrate that a highly localized slow mode is obtained in the defect. Owing to the piezoelectricity of LiNbO3, acoustic and electromagnetic waves are coupled with each other and transmit along the line defect. Therefore, in addition to a slow acoustic wave, an electromagnetic wave with a group velocity even lower than conventional acoustic waves is achieved.

关键词: piezoelectric material, phononic crystals, group velocity, slow wave

Abstract:

Coupled slow waves, slow acoustic waves, and electromagnetic waves are simultaneously achieved based on a piezoelectric material, in which a line defect is created within a honeycomb lattice array of cylindrical holes etched in a LiNbO3 slab. Finite element simulations in frequency domain and time domain demonstrate that a highly localized slow mode is obtained in the defect. Owing to the piezoelectricity of LiNbO3, acoustic and electromagnetic waves are coupled with each other and transmit along the line defect. Therefore, in addition to a slow acoustic wave, an electromagnetic wave with a group velocity even lower than conventional acoustic waves is achieved.

Key words: piezoelectric material, phononic crystals, group velocity, slow wave

中图分类号:  (Piezoelectric and ferroelectric transducers)

  • 43.38.Fx
43.35.Cg (Ultrasonic velocity, dispersion, scattering, diffraction, and Attenuation in solids; elastic constants) 43.35.Gk (Phonons in crystal lattices, quantum acoustics)