Advanced Electromagnetics Lab
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Research

From fundamental electromagnetic phenomena to programmable antennas, our research connects wave control with communications, sensing and imaging.

01

High-gain millimeter-wave & terahertz antennas

We develop high-gain millimeter-wave and terahertz antennas using 3D-printed lenses, transmitarrays, reflectarrays and leaky-wave structures. Our designs enable circular polarization, beam scanning and near-field focus steering, combining efficient wavefront control with wide bandwidth and compact profiles. We also explore filtering antennas and amplitude-modulated leaky-wave designs for high-directivity radiation and tailored beam patterns.

3D-printed lensesTransmitarraysReflectarraysLeaky-wave antennas
Representative work
Oxide-dispersion-enabled laser additive manufacturing of high-resolution copperNature Communications · 2025
An Ultralow-Profile Folded Transmitarray Antenna Based on a Multifunctional Metasurface With Both-Sided Wavefront ControlIEEE Trans. Antennas Propag. · 2023
High-gain filtering reflectarray antenna for millimeter-wave applicationsIEEE Trans. Antennas Propag. · 2020
User-selected photograph from Nature Communications Figure 6A: a blue-gloved hand holds a copper terahertz transmitarray antenna, with a 10 mm scale bar and the beam and sample illustration retained on the right.
Nature Communications · 20253D-printed copper terahertz transmitarrayRead paper ↗ · Figure 6A ↗Qu et al. · CC BY-NC-ND 4.0
Original IEEE TAP Figure 12 showing top and bottom views of the fabricated circularly polarized transmitarray prototype.
IEEE Trans. Antennas Propag. · 2023Wideband circularly polarized transmitarrayRead paper ↗ · Figure 12 ↗Dai, Wu & Luk · © IEEE 2023
Original IEEE TAP Figure 8 showing the 3D-printed reflectarray before and after metallization, the assembled antenna and the measurement setup. All four original panels are preserved.
IEEE Trans. Antennas Propag. · 2020High-gain filtering reflectarrayRead paper ↗ · Figure 8 ↗Wu, Zeng, Chan, Chen, Qu & Chan · © IEEE 2020
Enhanced user-provided photograph of a folded transmitarray antenna: a top metasurface is supported above a bottom metal plate reflector. White labels and arrows are retained; yellow dashed guides are removed.
IEEE Trans. Antennas Propag. · 2023Ultralow-profile transmitarray antennaRead paper ↗ · Original photo ↗Yang, Wu, Zheng, Chan & Chan · © IEEE 2023
02

Spatiotemporal modulation metasurface

We study spatiotemporally modulated metasurfaces for joint control of spatial radiation patterns and spectral components. Our work includes sideband-free space-time coding, independent control of harmonic orders and manipulation of the fundamental characteristics of electromagnetic waves.

Space-time codingHarmonic controlWavefront control
Representative work
High-dimensional multiplexing through vortex electromagnetic wave manipulation by space-time-coding metasurfacesLight: Science & Applications · 2026
A space-time holographic metasurface antennaScience Advances · 2025
Sideband-free space-time-coding metasurface antennasNature Electronics · 2022
A synthetic moving-envelope metasurface antenna for independent control of arbitrary harmonic ordersNature Communications · 2024
A universal metasurface antenna to manipulate all fundamental characteristics of electromagnetic wavesNature Communications · 2023
Space-time coding film drives a metasurface antenna to generate a frequency comb, alongside the fabricated prototype and meta-atom design.
Nature Communications · 2024Synthetic moving-envelope metasurface antennaRead paper ↗ · Figure 1 ↗Wu, Dai, Shum, Chan, Cheng, Cui & Chan · CC BY-NC-ND 4.0
03

Applied electromagnetics

We explore electromagnetic wave phenomena and their device implications, including vortex waves, gyromagnetic media, terahertz imaging and integrated sensing and communication.

Wave physicsImagingSensing
Representative work
A universal metasurface antenna to manipulate all fundamental characteristics of electromagnetic wavesNature Communications · 2023
A Null-Scanning Space-Time-Coding Metasurface Antenna for Power-Based Direction FindingIEEE Trans. Antennas Propag. · 2026
Bulk–spatiotemporal vortex correspondence in gyromagnetic zero-index mediaNature · 2025
3D-printed aberration-free terahertz metalens for ultra-broadband achromatic super-resolution wide-angle imaging with high numerical apertureNature Communications · 2025
Bound states in the continuum as nodal chain points of scattering matricesPhys. Rev. Lett. · 2025
Terahertz imaging setup with measured images of a defective grating, concealed PCB structures and leaf veins.
Nature Communications · 2025Terahertz imaging of concealed structures and biological samplesRead paper ↗ · Figure 4 ↗Chen, Huang, Chan, Wu & Chan · CC BY-NC-ND 4.0

Research Grants

Principal Investigator (PI)

  1. Advanced and Green Beamforming Metasurface Antennas for 6G
    RGC, ECS
    2025–2028HK$873,214PI: Wu Gengbo
  2. Research on high-precision direction-finding and tracking technology for metasurface antennas
    Shenzhen Natural Science Foundation Program
    2025–2028CNY 300,000PI: Wu Gengbo
  3. Research on Multi-harmonic Real time Imaging Technology Based on Spatiotemporal Modulated Metasurface Antenna
    NSFC Young Scientist Fund, NSFC
    2025–2027CNY 300,000PI: Wu Gengbo
  4. Research on Near-Field Focused Transmission Array Antenna Based on Spatiotemporal Modulation
    Guangdong Provincial Natural Science Foundation
    2025–2027CNY 100,000PI: Wu Gengbo
  5. Research on Millimeter-Wave Ultra-Low-Profile Two-Dimensional Beam Scanning Transmitarray Antenna Technology
    Shenzhen Natural Science Foundation Program
    2023–2026CNY 300,000PI: Wu Gengbo

Upcoming

  1. A New OAM Paradigm for High-Throughput
    General Research Fund (GRF), Research Grants Council (RGC) of Hong Kong
    2027–2030HK$894,156PI: Wu Gengbo

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