Inverse Design of Phononic Crystal with Desired Transmission via a Gradient-Descent Approach  

作　　者：魏宇航 贺达海 Yuhang Wei;Dahai He(Department of Physics and Jiujiang Research Institute,Xiamen University,Xiamen 361005,China)

机构地区：[1]Department of Physics and Jiujiang Research Institute,Xiamen University,Xiamen 361005,China

出　　处：《Chinese Physics Letters》2023年第9期14-18,共5页中国物理快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.12075199);the Natural Science Foundation of Fujian Province(Grant No.2021J01006);Jiangxi Province(Grant No.20212BAB201024)。

摘　　要：We propose a general approach based on the gradient descent method to study the inverse problem,making it possible to reversely engineer the microscopic configurations of materials that exhibit desired macroscopic properties.Particularly,we demonstrate its application by identifying the microscopic configurations within any given frequency range to achieve transparent phonon transport through one-dimensional harmonic lattices.Furthermore,we obtain the phonon transmission in terms of normal modes and find that the key to achieving phonon transparency or phonon blocking state lies in the ratio of the mode amplitudes at ends.

关 键 词：PROPERTIES PHONON DESIRED 

分 类 号：TB30[一般工业技术—材料科学与工程]