Acoustic defect-mode waveguides fabricated in sonic crystal: Numerical analyses by elastic finite-difference time-domain method

Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers

Volumn 45, Issue 5 B, 2006, Pages 4440-4447

  Miyashita, Toyokatsu ^a  

^a RYUKOKU UNIVERSITY   (Japan)

Author keywords

Acoustic waveguide; Acrylic resin cylinders in air; Defect mode; Elastic FDTD method; Line defects; Phononic crystal; Point defect; Resonant mode; Single defect; Sonic crystal

Indexed keywords

COMPUTER SIMULATION; FINITE DIFFERENCE METHOD; NUMERICAL ANALYSIS; OPTICAL WAVEGUIDES; PHOTONS; TIME DOMAIN ANALYSIS;

ACRYLIC RESIN CYLINDERS IN AIR; DEFECT MODE; ELASTIC FDTD METHOD; LINE DEFECTS; POINT DEFECT; RESONANT MODE; SINGLE DEFECT; SONIC CRYSTAL;

ACOUSTIC WAVE PROPAGATION;

EID: 33744499960     PISSN: 00214922     EISSN: 13474065     Source Type: Journal    
DOI: 10.1143/JJAP.45.4440     Document Type: Article

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17. Thus far, we have normalized the transmissions by the sound amplitude which traveled in the free space with no crystals and no waveguides to the outlet position, adjusting the conditions of the FDTD calculations to those for our actual experimental measurements. Therefore, the transmissions had larger values than 0 dB in the low-frequency range below the band gap owing to the frequency-dependent diffraction loss included in the reference waves.