中国物理B ›› 2024, Vol. 33 ›› Issue (4): 44301-044301.doi: 10.1088/1674-1056/ad0bf5

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Sensing the heavy water concentration in an H2O—D2O mixture by solid—solid phononic crystals

Mohammadreza Rahimi and Ali Bahrami   

  1. Optoelectronic and Nanophotonics Research Laboratory(ONRL), Faculty of Electrical Engineering, Sahand University of Technology, Tabriz, Iran
  • 收稿日期:2023-07-22 修回日期:2023-11-10 接受日期:2023-11-13 出版日期:2024-03-19 发布日期:2024-03-19
  • 通讯作者: Ali Bahrami E-mail:bahrami@sut.ac.ir

Sensing the heavy water concentration in an H2O—D2O mixture by solid—solid phononic crystals

Mohammadreza Rahimi and Ali Bahrami   

  1. Optoelectronic and Nanophotonics Research Laboratory(ONRL), Faculty of Electrical Engineering, Sahand University of Technology, Tabriz, Iran
  • Received:2023-07-22 Revised:2023-11-10 Accepted:2023-11-13 Online:2024-03-19 Published:2024-03-19
  • Contact: Ali Bahrami E-mail:bahrami@sut.ac.ir

摘要: A new method based on phononic crystals is presented to detect the concentration of heavy water (D2O) in an H2O—D2O mixture. Results have been obtained and analyzed in the concentration range of 0%—10% and 90%—100% D2O. A proposed structure of tungsten scatterers in an aluminum host is studied. In order to detect the target material, a cavity region is considered as a sound wave resonator in which the target material with different concentrations of D2O is embedded. By changing the concentration of D2O in the H2O—D2O mixture, the resonance frequency undergoes a frequency shift. Each 1% change in D2O concentration in the H2O—D2O mixture causes a frequency change of about 120 Hz. The finite element method is used as the numerical method to calculate and analyze the natural frequencies and transmission spectra of the proposed sensor. The performance evaluation index shows a high Q factor up to 1475758 and a high sensitivity up to 13075, which are acceptable values for sensing purposes. The other figures of merit related to the detection performance also indicate high-quality performance of the designed sensor.

关键词: phononic crystals, sensor, H2O—D2O mixture, cavity

Abstract: A new method based on phononic crystals is presented to detect the concentration of heavy water (D2O) in an H2O—D2O mixture. Results have been obtained and analyzed in the concentration range of 0%—10% and 90%—100% D2O. A proposed structure of tungsten scatterers in an aluminum host is studied. In order to detect the target material, a cavity region is considered as a sound wave resonator in which the target material with different concentrations of D2O is embedded. By changing the concentration of D2O in the H2O—D2O mixture, the resonance frequency undergoes a frequency shift. Each 1% change in D2O concentration in the H2O—D2O mixture causes a frequency change of about 120 Hz. The finite element method is used as the numerical method to calculate and analyze the natural frequencies and transmission spectra of the proposed sensor. The performance evaluation index shows a high Q factor up to 1475758 and a high sensitivity up to 13075, which are acceptable values for sensing purposes. The other figures of merit related to the detection performance also indicate high-quality performance of the designed sensor.

Key words: phononic crystals, sensor, H2O—D2O mixture, cavity

中图分类号:  (General linear acoustics)

  • 43.20.+g
43.40.+s (Structural acoustics and vibration) 43.58.+z (Acoustical measurements and instrumentation)