- X Jiang, S Yin, H Li, J Quan, H Goh, M Cotrufo, J Kullig, J Wiersig, and A Alù (2023). "Coherent control of chaotic optical microcavity with reflectionless scattering modes." Nature Physics, 1–7.
- On the cover - S Mann, H Goh, and A Alù (2023). "Inverse design of nonlinear polaritonic metasurfaces for second harmonic generation." ACS Photonics, 10(4), 993.
- On the cover - H Goh, A Krasnok, and A Alù (2024). "Nonreciprocal scattering and unidirectional cloaking in nonlinear nanoantennas." Nanophotonics.
- H Goh, Y-T Wang, S Mann, and A Alù (in preparation).
- Y-T Wang, H Goh, S Mann, and A Alù (in preparation).
- H Goh and A Alù (2022). "Nonlocal scattering for compact wave-based analog computing." Physical Review Letters, 128, 073201.
- Featured in Physics, American Physical Society Physics 15, s23 (February 18, 2022) - K Ma, H Goh, and LF Kallivokas (2022). "Design of metasurfaces in 3D for omnidirectional band gaps: the scalar wave case." Extreme Mechanics Letter, 101922.
- H Goh and LF Kallivokas (2020). "Inverse bandgap design of elastic metamaterials for P and SV wave control." Computer Methods in Applied Mechanics and Engineering, 370, 113263.
- H Goh and LF Kallivokas (2019). "Group velocity-driven inverse metamaterial design." Journal of Engineering Mechanics, 145(12), 04019094.
- Editor's Choice, Journal of Engineering Mechanics, Issue 12 (December 2019)
- Special Collection on Recent Advances in Computational Methods in Engineering Mechanics - H Goh and LF Kallivokas (2019). "Inverse metamaterial design for controlling band gaps in scalar wave problems." Wave Motion, 88, 85-105.
- S François, H Goh, and LF Kallivokas (2021). "Non-convolutional Second-Order Complex-Frequency-Shifted Perfectly Matched Layers for Transient Elastic Wave Propagation." Computer Methods in Applied Mechanics and Engineering, 377, 113704
- S Koo, H Goh, and LF Kallivokas (2023). "Wave-focusing to subsurface targets using a switching time-reversal mirror." Soil Dynamics and Earthquake Engineering, 166, 107736.
- H Goh, S Koo, and LF Kallivokas (2019). "Resolution improving filter for time-reversal (TR) with a switching TR mirror in a halfspace." The Journal of the Acoustical Society of America, 145(4), 2328-2336.
- B Guidi, H Goh, and C Jeong (2023). "Effective Seismic Force Retrieval from Surface Measurement for SH-Wave Reconstruction." Soil Dynamics and Earthquake Engineering, 165, 107682.
- H Huh, H Goh, JW Kang, S François, and LF Kallivokas (in revision).
- S Kucukcoban, H Goh, and LF Kallivokas (2019). "On the full-waveform inversion of Lamé parameters in semi-infinite solids in plane strain." International Journal of Solids and Structures, 164, 104-119.
- In preparation
Nonreciprocal or nonlinear constitutive relations can induce unusual phenomena such as extinction asymmetry, directional transparency, or second harmonic generation. We develop theoretical backgrounds and inverse-design frameworks to harness anomalous scattering.
Wave-based analog computing aims to provide a fast, energy-efficient, and massively parallel computation beyond the limitation of digital processors by engineering wave-material interaction. We tailor the nonlocal responses of a single scatterer to design a compact and robust analog computer for solving integro-differential equations.
The dispersion relation of a medium discloses wave propagation characteristics, such as direction and speed. We develop two design methods for metamaterials and structures, driven by user-defined target dispersive behavior of periodic media: (a) group velocity-based inverse design for wave energy propagation control; and (b) discriminant-based inverse design for band-gap control.
A perfectly matched layer (PML) is the most effective numerical scheme to simulate wave propagation in a heterogeneous unbounded domain despite its high computational cost. We propose a new formulation of PML for computational efficiency and stability.
Time reversal wave focusing problem is used widely in imaging and energy delivery, where its geophysical applications are challenging due to its massive object and data-type discrepancy between measured responses and applied sources. We develop a resolution-improving filter for time-reversal applications with a switching TR mirror; multi-target energy focusing using time reversal for oil recovery applications.
Subsurface imaging is an essential tool for site investigation and infrastructure monitoring. We developed reduced- and full-waveform inversion for imaging a medium's elastic properties: (a) a reduced-waveform inversion for shear-wave velocity profiling of an earth dam using cross-hole tests; and (b) a full-waveform inversion of the Lamé parameters for solid and subsurface imaging applications.
Strong interfacial responses between a solid and fluid can be measured and compared with simulations to identify the medium's properties. We develop a numerical model to simulate wave propagation in a solid-fluid coupled medium for high-performance computing.
