Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Chia-Nien Tsai"'
Publikováno v:
Advanced Functional Materials. 30:2070047
Publikováno v:
Advanced Functional Materials. 30:1906718
Publikováno v:
Applied Physics A. 109:523-533
Transformation acoustics is employed to design an acoustic bending waveguide. A two-dimensional square area with anisotropic and homogeneous material properties is transformed into a fan-shaped area with anisotropic and inhomogeneous material propert
Autor:
Chia Nien Tsai, Lien Wen Chen
Publikováno v:
Applied Physics A. 122
Self-collimation is wave propagation in straight path without diffraction. The performance is evaluated by bandwidth, angular collimating range and straightness of equi-frequency contours. The present study aims to manipulate the self-collimated beam
Publikováno v:
Volume 13: Vibration, Acoustics and Wave Propagation.
The wave propagations of two dimensional phononic crystals composed of auxetic materials are studied. The periodic structures consist of square lattice air cylinders in a solid background made of auxetic material. The finite element method and plane
Publikováno v:
Volume 13: Vibration, Acoustics and Wave Propagation.
The present study proposes a wideband two-dimensional Luneburg lens using graded phononic crystals (GPCs). We present a method to broaden the range of operation frequency of the Luneburg lens based on GPCs. The GPCs is composed of circular cylindrica
Publikováno v:
Physica B: Condensed Matter. 406:1722-1726
Based on the coordinate transformation theory, we propose a way to manipulate the field distribution in three-dimensional waveguides filled with the designed material. In this work, we show that the designed transformation media can concentrate the e
Publikováno v:
Applied Physics A. 103:355-359
The acoustic hyperlens can be realized by an alternating layered structure of water and fluid with negative mass density. Based on this alternating layered principle, we propose that an acoustic metamaterial consisting of three layers in water backgr
Autor:
Chia-Nien Tsai, Lien Wen Chen
Publikováno v:
2014 International Symposium on Optomechatronic Technologies.
The present study proposes a method for improving the self-collimation performance of square array phononic crystals by means of orientated rectangular inclusions. Finite element simulations are performed to investigate the effects of the aspect rati