Sensing the heavy water concentration in an H_(2)O-D_(2)O mixture by solid-solid phononic crystals  

作　　者：Mohammadreza Rahimi Ali Bahrami 

机构地区：[1]Optoelectronic and Nanophotonics Research Laboratory(ONRL),Faculty of Electrical Engineering,Sahand University of Technology,Tabriz,Iran

出　　处：《Chinese Physics B》2024年第4期493-498,共6页中国物理B（英文版）

摘　　要：A new method based on phononic crystals is presented to detect the concentration of heavy water(D_(2)O)in an H_(2)O-D_(2)O mixture.Results have been obtained and analyzed in the concentration range of 0%-10%and 90%-100%D_(2)O.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 D_(2)O is embedded.By changing the concentration of D_(2)O in the H_(2)O-D_(2)O mixture,the resonance frequency undergoes a frequency shift.Each 1%change in D_(2)O concentration in the H_(2)O-D_(2)O 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 H_(2)O-D_(2)O mixture CAVITY 

分 类 号：O735[理学—晶体学] TQ123.56[化学工程—无机化工]