Under the support of the National Natural Science Foundation of China (approval number: 11922407, 12074183), the research group of Professor Liu Xiaojun and Professor Cheng Ying of the Institute of Acoustics of Nanjing University and the research group of Professor John Christensen from Spain cooperated for the first time using carbon nanotubes ( The thermoacoustic effect of the CNT) film realizes an equivalent acoustic gain medium and constructs a topologically protected non-Hermitian whispering corridor structure, which provides an excellent platform for the theoretical research of non-Hermitian topological acoustics
Since the 2016 Nobel Prize in Physics was awarded to topological phase transitions and topological insulators, the research on related topological structures from condensed matter to photonic crystals has become one of the most cutting-edge academic directions in physics
The research group of Professor Liu Xiaojun and Professor Cheng Ying of Nanjing University has ingeniously designed a non-Hermitian acoustic element.
This research opens up a new way of equivalent acoustic gain medium simulation, and provides a new direction for studying novel phenomena in non-Hermitian topological physics based on classic acoustic wave systems.
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