Zhi Jackie Yao
2019 Alvarez Postdoctoral Researcher
Applied Mathematics and Computational Research Division
Zhi Jackie Yao
Lawrence Berkeley National Lab
1 Cyclotron Rd.
Berkeley, CA 94720
for my personal webpage.
Overview and Research Interests
I am a Research Scientist in the
Computing Sciences Area
at the Lawrence Berkeley National Laboratory.
I have a combined background in computational science and domain sciences of physical waves and electronics.
My current primary research interest is in high-fidelity computational algorithms for microelectronics applications.
I work closely with material scientists, device designers, circuit architects and machine learning experts, to codesign workflow that benefits the development of future electronics.
We address the need for enhanced modeling for more realistic devices by developing an algorithmically
flexible capability that is performant on manycore/GPU-based supercomputers.
The main product of this research is the Microelectronics package.
Microelectronics package is able to effectively capture the multiphysics aspect of emerging microelectronics, with increased spatial resolutions.
This allows for GPU simulations of various devices including multiferroic logic, ferroelectric capacitors and transistors, magnetic RF devices, high-frequency circuits, etc.
Microelectronics and Quantum Chip Modeling
Emerging post-CMOS technologies often rely on trial-and-error development strategies due to the lack of adequate simulation tools.
There is an ever-increasing need for higher-fidelity simulations via higher spatiotemporal resolution and/or improved coupling that can seamlessly incorporate
new physics into algorithms for widely-used, standard models.
for a brief overview that I gave in the 2021 Supercomputing Conference (SC21) titled
Exascale-Enabled Physical Modeling for Next-Generation Microelectronics.
I received the Ph.D. degree in December of 2017 from Electrical and Computer Engineering (ECE) Department at University of California, Los Angeles (UCLA), and continued pursuing research
in the same department as a postdoc until September of 2019. During my graduate study,
my research has been centered on using new physical coupling in novel electronic devices,
specifically the design and characterization of miniaturized multiferroic components in RF systems.
I have proposed, modeled, and characterized strain-mediated multiferroic antennas ,
as well as contributed to building ferromagnetic resonance-enhanced electrically small antennas,
Lamb wave resonators with parametric amplification,
and magnetic field receivers based on resonant precession modulation.
- Z. Yao, R. Jambunathan, Y. Zeng and A. Nonaka, A massively parallel time-domain coupled electrodynamics-micromagnetics solver.
International Journal of High Performance Computing Applications (IJHPCA), 36(2), pp.167-181, Jan. 2022
- K.Q.T. Luong, W. Gu, F. Fereidoony, L. Yeung, Z. Yao, and Y. E. Wang, Radio frequency precession modulation based magnetic field sensors.
IEEE Access, Jan. 2022
- Z. Yao, S. Tiwari, J. Schneider, R. N. Candler, G. P. Carman, and Y. E. Wang, Enhanced planar antenna efficiency through magnetic thin-films.
IEEE Journal on Multiscale and Multiphysics Computational Techniques, Dec. 2021
- J. Rivera, Z. Yao, et al. Verification testing of multi-dynamical solver for multiferroic antennas.
Proceedings of 2021 International Applied Computational Electromagnetics Society Symposium (ACES), Sep. 2021
- M. G. Bautista, Z. Yao, A. Butko, M. Kiran and M. Metcalf, Towards automated superconducting circuit calibration using deep reinforcement learning.
Proceedings of 2021 IEEE Computer Society Annual Symposium on VLSI (ISVLSI), pp. 462-467, Jul. 2021
- W. Gu, K. Luong, Z. Yao, H. Cui and Y. E. Wang, Ferromagnetic resonance enhanced electrically small antennas.
IEEE Transactions on Antennas and Propagation, pp. 8304-8314, Jun. 2021.
- T. Lu, J. D. Schneider, X. Zou, S. Tiwari, Z. Yao, G.P. Carman, R. N. Candler, Y. E. Wang, Lamb wave resonator loaded non-reciprocal RF devices.
Proceedings of IEEE/MTT-S International Microwave Symposium (IMS), Aug. 2020
- A. Acosta, K. Fitzell, J. D. Schneider, C. Dong, Z. Yao, R. Sheil, Y. E. Wang, G. P. Carman, N. X. Sun, and J. P. Chang, Underlayer effect on the soft magnetic, high frequency, and magnetostrictive properties of FeGa thin films.
Journal of Applied Physics, 128, 013903, Oct. 2020
- A. Acosta, K. Fitzell, J. D. Schneider, C. Dong, Z. Yao, Y. E. Wang, G. P. Carman, N. X. Sun, and J. P. Chang, Enhancing the soft magnetic properties of FeGa with a non-magnetic underlayer for microwave applications.
Applied Physics Letters, 116, 222404, Jun. 2020.
- Z. Yao, S. Tiwari, T. Lu, J. Rivera, K. Luong, R. N. Candler, G. P. Carman and Y. E. Wang, Modeling of multiple dynamics in the radiation of bulk acoustic wave (BAW) antennas.
IEEE Journal on Multiscale and Multiphysics Comput. Techniques, pp. 5-18, Dec. 2019.
- J. D. Schneider, J. P. Domann, M. K. Panduranga, S. Tiwari, P. Shirazi, Z. Yao, et al., Experimental demonstration and operating principles of a multiferroic antenna.
Journal of Applied Physics, vol. 126, 224104, Dec. 2019.
- Z. Yao, H. Cui, R. U. Tok and Y. E. Wang, 3D multiscale unconditionally stable time-domain modeling of nonlinear RF thin film magnetic devices.
roceedings of IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, pp. 1059-1060, Jul. 2019.
- H. Cui, Z. Yao and Y. E. Wang, Coupling electromagnetic waves to spin waves: a physics-based nonlinear circuit model for frequency-selective limiters .
IEEE Trans. Microw. Theory Tech., vol. 67, pp. 3221-3229, Jun. 2019.
- T. Lu, J. D. Schneider, Z. Yao, G. Carman and Y. E. Wang, Nonlinear surface acoustic wave grating for parametric amplification .
Proceedings of IEEE Radio and Wireless Symposium (RWS), Jan. 2019.
- H. Cui, Z. Yao, C. Tao, Y. E. Wang, Nonlinear equivalent-circuit model for thin-film magnetic material based RF devices .
Proc. IEEE MTT-S Int. Microwave Workshop Series on Advanced Materials and Processes for RF&THz Applications (IMWS-AMP) , pp. 1-3, Jul. 2018.
- Z. Yao, H. Cui, T. Itoh, and Y. E. Wang, Multiphysics time-domain modeling of nonlinear permeability in thin-film magnetic material .
Proc. IEEE International Microwave Symp. (IMS) , pp. 208-211, Jun. 2018.
- Z. Yao, R. U. Tok, T. Itoh and Y. E. Wang, A multiscale, unconditionally stable time-domain (MUST) solver unifying electrodynamics and micromagnetics .
IEEE Trans. Microw. Theory Tech., vol. 66, pp (99): 1-14, May 2018.
- Z. Yao and Y. E. Wang, 3D modeling of BAW-based multiferroic antennas .
Proc. IEEE International Symp. Antennas Propag. & USNC/URSI National Radio Science Meeting (APS/URSI) , pp. 1125-1126, Jul. 2017.
- (Best Student Paper) Z. Yao and Y. E. Wang, 3D unconditionally stable FDTD modeling of micromagnetics and electrodynamics .
Proc. IEEE International Microwave Symp. (IMS) , pp. 12-15. Jun. 2017.
- Z. Yao and Y. E. Wang, 3D ADI-FDTD modeling of platform reduction with thin film ferromagnetic material .
Proc. IEEE APS/URSI , pp. 2019-2020, Jun. 2016.
- Z. Yao, Y. E. Wang, S. Keller, G. P. Carman, Bulk acoustic wave mediated multiferroic antennas: architecture and performance bound .
IEEE Trans. Antennas Propag , vol. 63, pp. 3335-3344, Aug. 2015.
- Z. Yao and Y. E. Wang, Bulk acoustic wave mediated multiferroic antennas near ferromagnetic resonance .
Proc. IEEE APS/URSI , pp. 1832-1833, Jul. 2015.
- Z. Yao, Q. Xu and Y. E. Wang, FDTD analysis of platform effect reduction with thin film ferrite .
Proc. IEEE Radio and Wireless Symposium , pp. 59-61, Jan. 2015.
- Z. Yao and Y. E. Wang, Dynamic analysis of acoustic wave mediated multiferroic radiation via FDTD methods .
Proc. IEEE APS/URSI , pp. 731-732, Jul. 2014.