Li Quan, Ph.D.
Apple Inc.
Welcome to Li Quan's homepage!
Li Quan received his B.S. and M.S. degree from Nanjing University in 2011 and 2014, and his Ph.D. degree in Electrical and Computer Engineering from the University of Texas at Austin in 2020. He is now a Senior Acoustic Engineer at Apple Inc.
Li Quan's research mainly aims to understand the physical mechanisms of interactions between waves and matters, especially in the scope of acoustics, design novel devices, and seek their possible biomedical and industrial applications. Li Quan's research span over a broad scope of acoustics, such as acoustic metamaterials, acousto-fluidic devices, ultrasound non-destructive testing, the physical model of MEMS microphones, etc. In the recent years, his main efforts have been devoted to the research of acoustic metamaterials, their exotic phenomena, and their industry applications, with particular focuses on Willis coupling effect, non-reciprocal acoustic devices, low-frequency acoustic beam collimation and acoustic effective impedance modulation.
Li Quan's main scientific contributions are the proposed theory of the bound of Willis coupling indicating that the Willis coupling effect can be as strong as the direct polarizabilities. He has also proposed the systematic design approach of acoustic inclusions which can reach the maximum Willis coupling. To date, he has authored and/or co-authored 18 journal papers, 16 conference papers and 4 patents, among which are published in highly selective journals, including 3 Nature Communications and 3 Physical Review Letters. He is also a reviewer for 22 international peer-review journals.
News
January 2022: Li Quan joined Apple Inc. as a senior acoustic engineer.
May 20201: Our paper "Odd Willis coupling induced by broken time-reversal symmetry" has been published in Nature Communications.
July 2020: Li Quan joined MilliporeSigma, a business of Merck, KGaA, as a senior acoustic engineer. He is seeking applications of metamaterials in life science and developing acousto-fluidic devices for cell processing.
April 2020: Li Quan has successfully defended his Ph.D. and obtained his Ph.D. Degree.
November 2019: Our paper "Hyperbolic sound propagation over nonlocal acoustic metasurfaces" has been accepted for publication in Physical Review Letters.
August 2019: Our paper "Nonreciprocal Willis coupling in zero-index moving media"has been published in Physical Review Letters.
July 2019: Our paper "Acoustic meta-atom with experimentally verified maximum Willis coupling"has been published in Nature Communications.
May 2019: Our paper "Passive acoustic metasurface with unitary reflection based on nonlocality"has been published in Physical Review Applied.
May 2019: Li Quan has successfully addressed an Invited talk "Maximum non-reciprocal Willis scatterers" at 2019 AmeriMech Symposium: Non-reciprocal and Topological Wave Phenomena in Solids and Fluids, Columbia, Missouri.
May 2019: Li Quan has been selected to receive NSF Fellowship Award.
May 2019: Li Quan has been selected to receive Professional Development Award from the University of Texas at Austin.
May 2019: Li Quan has successfully addressed a talk "Surface acoustic waves over bianisotropic metasurfaces" at 177th Meeting of the Acoustical Society of America, Louisville, Kentucky.
March 2019: Li Quan has successfully addressed a talk "Acoustic bianisotropic impedance and hyperbolic propagation in metasurfaces" at APS March Meeting 2019, Boston, Massachusetts.
Nov. 2018: Li Quan has successfully passed the Ph.D. Qualifying Exam and be admitted to doctoral candidacy.
Sep. 2018: Our paper "Non-Reciprocal Willis Coupling in Zero-index Moving Media" is available on arXiv.
Jun. 2018: Our paper "Maximum Willis Coupling in Acoustic Scatters" has been published in Physical Review Letters.
