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Title: Acoustic beam splitting in two-dimensional phononic crystals using self-collimation effect

We propose two models of self-collimation-based beam splitters in phononic crystals. The finite element method is used to investigate the propagation properties of acoustic waves in two-dimensional phononic crystals. The calculated results show that the efficiency of the beam splitter can be controlled systematically by varying the radius of the rods or by changing the orientation of the square rods in the line defect. The effect of changing the side length of the square rods on acoustic wave propagation is discussed. The results show that the total transmission/reflection range decreases/increases as the side length increases. We also find that the relationship between the orientation of the transflective point and the side length of the square rods is quasi-linear.
Authors:
 [1] ;  [2] ; ;  [3] ; ;  [1]
  1. Department of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006 (China)
  2. (China)
  3. Department of Experiment Education, Guangdong University of Technology, Guangzhou 510006 (China)
Publication Date:
OSTI Identifier:
22492808
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 14; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BEAM SPLITTING; BEAMS; CRYSTALS; FINITE ELEMENT METHOD; LENGTH; LINE DEFECTS; REFLECTION; TWO-DIMENSIONAL CALCULATIONS; TWO-DIMENSIONAL SYSTEMS