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Electrically tunable strong coupling in a hybrid-2D excitonic metasurface for optical modulation
Tom Hoekstra1, Jorik van de Groep2
1Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Amsterdam, the Netherlands.
Light, Science & Applications
|January 1, 2026
Summary
Researchers developed a hybrid-2D excitonic metasurface for dynamic light manipulation. This novel device achieves strong exciton-photon coupling at room temperature, enabling efficient optical modulation for advanced nanophotonic applications.
Area of Science:
- Nanophotonics
- Materials Science
- Quantum Optics
Background:
- Atomically thin semiconductors offer tunable exciton resonances for light manipulation in metadevices.
- Exciton decay and dephasing at room temperature limit efficiencies in active metasurfaces.
Purpose of the Study:
- To enhance exciton-photon coupling in hybrid-2D excitonic metasurfaces for active optical modulation.
- To achieve strong and electrically tunable coupling at ambient conditions.
Main Methods:
- Utilized pristine 2D heterostructures combined with non-local dielectric metasurfaces.
- Fabricated a hybrid-2D excitonic metasurface.
- Experimentally demonstrated optical modulation via gating-induced carrier concentration changes.
Main Results:
- Achieved strong and electrically tunable exciton-photon coupling at room temperature.
- Realized a free-space optical modulator with 9.9 dB reflectance modulation.
- Demonstrated electro-optic response through continuous transition from strong to weak coupling.
Conclusions:
- Hybrid-2D excitonic metasurfaces enable efficient active wavefront manipulation.
- These metasurfaces offer new possibilities for optical communication devices.
- Gating-induced carrier modulation of exciton decay is key to the electro-optic response.
