A Multiscale, Unconditionally Stable Multiphysics Solver Unifying Electrodynamics, Elastodynamics and Spin Dynamics

Speaker: Zhi (Jackie) Yao
Affiliation: Ph.D. Candidate - UCLA


Thin film ferrites or ferromagnets in the sub-micron-scale are known to possess unique properties such as high in-plane permeability, high ferromagnetic resonant (FMR) frequency, as well as tuneability and nonlinearity. Another fast-growing area is RF magnetoelasticity, which provides voltage tuneable or activated spin-wave devices through induced mechanical strain. These unique properties have led to a variety of applications in power electronics and RF devices, such as circulators, isolators, antennas, frequency selective limiters (FSL) and signal-to-noise enhancers (SNE).

     Nevertheless, the lack of powerful modeling tools dealing with interactions between oscillating magnetization and EM waves hinders the in-depth understanding of the role of magnetism in dynamic and high-frequency systems, and limits its application in RF electronics. We have attacked the grand challenge through development of a multi-physics, multi-scale time-domain solver that can model the five orders of magnitudes scale difference from µm to cm, including the physics from electrodynamics, elastodynamics and spin dynamics. The solver is accurate and efficient, and is aimed to be developed into a unified computation platform.


Zhi (Jackie) Yao received her B.S. in Optical Engineering in 2012 from Zhejiang University, China. She joined the Digital Microwave Lab at UCLA to pursue her M.S./Ph.D. degree in 2012, under the mentorship of Prof. Yuanxun Ethan Wang. During her graduate study at UCLA, she worked in the center for Translational Applications of Nanoscale Multiferroic Systems (TANMS). She is the recipient of the 2014 Ph.D. Prelim Exam Fellowship, 2014 Outstanding Master’s Thesis in Physical & Wave Electronics of EE, UCLA, 2015-2016 Qualcomm Innovation Fellowship, 2017 IEEE Antennas and Propagation Society Doctoral Research Grant, and 2017 International Microwave Symposium Student Paper Competition 1st place.

For more information, contact Prof. Yuanxun Ethan Wang ()

Date(s) - Aug 14, 2017
10:00 am - 12:00 pm

E-IV Faraday Room #67-124
420 Westwood Plaza - 6th Flr., Los Angeles CA 90095