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A proposal for three-channel hypersonic wave thermo-switch

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Abstract

A two-dimensional phononic crystals based hypersonic-wave switch is theoretically investigated. The temperature effect is considered for a two-dimensional solid–solid phononic crystal composed of a square array of Epoxy rods embedded in a Tungsten matrix. Using finite element method, temperature dependence of the band gap is examined. The numerical results show that the bandgap position and width strongly depend on the temperature and they can be modified when the temperature increases from 10 to 45 °C. Due to its good contrast with Tungsten and Epoxy in elastic properties and its high temperature dependence, Barium Strontium Titanate [Ba0.7Sr0.3TiO3] (BST) is used as the defect material. Defect modes could be tuned by modifying the radius of BST filled rods. The strong temperature dependence and phononic crystals periodicity prove the structure desirable for thermal switching. A hypersonic-wave 1 × 3 switch is designed for the specific frequency f = 1.50 GHz at room temperature.

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Authors and Affiliations

  1. Optoelectronics and Nanophotonics Research Lab. (ONRL), Faculty of Electrical Engineering, Sahand University of Technology, Tabriz, Iran

    Mehran Alinejad & Ali Bahrami

  2. Microelectronics Research Lab., Faculty of Electrical Engineering, Sahand University of Technology, Tabriz, Iran

    Habib Badri-Ghavifekr

Authors
  1. Mehran Alinejad
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  2. Ali Bahrami
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  3. Habib Badri-Ghavifekr
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Correspondence to Ali Bahrami.

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Alinejad, M., Bahrami, A. & Badri-Ghavifekr, H. A proposal for three-channel hypersonic wave thermo-switch. Indian J Phys 95, 1391–1399 (2021). https://doi.org/10.1007/s12648-020-01794-4

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  • DOI: https://doi.org/10.1007/s12648-020-01794-4

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