June 1, 2026 New group memmbers

Jeehyun (Jen) Lee and Levi Homer joined the group as PhD students. Welcome!

May 22, 2026 New publication

Our work on designing multi-layer metasurfaces for advanced angular control of light has been published in Laser & Photonics Reviews. In this paper, we discuss a general recipe to design multi-layer metasurfaces to induce non-trivial angle-dependent responses. As an example, we numerically demonstrate 1D and 3D bilayer devices that combine a local metasurface with a nonlocal one. By combining the starkly different angular response of the two layers, we are able to realize angular band-pass filters: devices which stop light propagation at normal incidence and at large angle, while allowing light to pass at intermediate angles. The work has been led by former undergraduate researcher Nicholas Gaitanis.

Feb 4, 2026 New publication

In a recently published paper led by Felix Wong, we show that bilayer metasurfaces with a controllable twist can be used for reconfigurable analog computation in the time domain. We demonstrated numerically a device whose operation can be continuosly tuned between 'no operation', first-order time derivative, and second-order time derivative, including superpositions of these operations. The device can also operate in dual-band, simultaneously processing signals carried by two frequencies. The work has been published in Advanced Optical Materials, and featured on the back cover of the issue .

Feb 2, 2026 New publication

Our work on nonlinear nonlocal metasurfaces has been published in eLight, and covered in several press releases (ScienceDaily, Phys.org, EurekAlert!, LaserFocusWorld.com). In this work we experimentally demonstrated nonlinear nonlocal metasurfaces that simultaneously enhance light-matter interactions, boosting nonlinear conversion efficiency, and enable precise subwavelength control over the wavefront of the generated light. In particular, we demonstrated a silicon metasurface for beam steering of third-harmonic generation in the visible controlled by the pump polarization.

Oct 27, 2025 New publication

Together with collaborators from Columbia University, CUNY, and Politecnico di Milano (Italy), we demonstrated that patterning thin flakes of 3R-MoS2 into periodic metasurfaces can lead to two orders of magnitude (140×) enhancement of the second-harmonic generation. The work has been published in Nature Photonics, and covered by Phys.org.

Sep 1, 2025

Matt Belzer presented his recent research on near-unity few-photon nonreciprocal transmission in many-body waveguide-QED systems at Metamaterials 2025 in Amsterdam.

June 5, 2025 New publication

Our work on nonlinear analog processing with unpatterned thin films has been published in Nanophotonics.

Mar 5, 2025

Our work on reconfigurable image processing metasurfaces has been highlighted in the Top 25 Physics Articles of 2024 collection, which includes the most downloaded Nature Communications papers in physics published in 2024.

Nov 14, 2024 Michele Cotrufo is awarded the 2024 ISSNAF Young Investigator Strazzabosco Award

Oct 1, 2024 New publication

Our paper on performing analog temporal differentiation at optical frequencies with metasurfaces has been published in npj Nanophotonics.

Aug 7, 2024 New publication

Our paper on tailoring space-time nonlocal metasurfaces to perform event-based edge detection has been published in Physical Review Letters.

June 1, 2024

Matthew Belzer and Felix Wong join the group as PhD students. Welcome!

May 27, 2024 New publication

Our paper on reconfigurable image processing metasurfaces has been published in Nature Communications.

See also press releases at Phys.org and EurekAlert!.

May 18, 2024 Congratulations to Nick, Xukun, Max and Mingzhe for graduating!

Our undegraduate researchers Nick Gaitanis, Xukun Lin, Max Zhang and Mingzhe Han have graduated today. Congratulations!

December 1, 2023 Michele Cotrufo receives the Photonics 2023 Young Investigator Award from MDPI