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Polycrystalline Silicon Thin-film Solar cells with Plasmonic-enhanced Light-trapping

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Transferable Plasmonic Arrays Enabling Strong Coupling with Layered Perovskites in an Active Diode Architecture.

Fabien Dorey¹, Jonas D Ziegler¹, Antti J Moilanen^1,2

¹Photonics Laboratory, ETH Zürich, CH-8093 Zürich, Switzerland.

|December 31, 2025

Summary

This study demonstrates strong coupling between 2D perovskites and plasmonic cavities on hexagonal boron nitride (hBN). This integration enables efficient light-matter interactions and on-chip photonic device potential.

Keywords:

2D materials Light emitting devices Polaritons Strong coupling Surface lattice resonances perovskites

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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

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Area of Science:

Nanophotonics
Materials Science
Quantum Optics

Background:

Plasmonic cavities offer nanoscale light confinement, enhancing light-matter interactions.
Advances in plasmonic architectures and active materials facilitate on-chip photonic integration.

Purpose of the Study:

To demonstrate strong coupling between 2D layered perovskites and transferable plasmonic cavities.
To explore the potential for on-chip integration of these hybrid systems.

Main Methods:

Fabrication of a transferable plasmonic cavity on hexagonal boron nitride (hBN).
Optical excitation to observe exciton-cavity mode interactions.
Investigation of electrical excitation via electron tunneling and energy transfer.

Main Results:

Clear evidence of strong and ultrastrong coupling between 2D perovskites and plasmonic cavity modes (g up to 10% of resonance energy).
Observation of polariton mode hybridization and waveguiding effects.
Significant line width narrowing of polariton modes compared to bare cavity and exciton line widths.

Conclusions:

The hybrid system exhibits strong light-matter interactions suitable for advanced photonic applications.
Electrical excitation of hybrid modes is feasible, paving the way for integrated on-chip devices.
This work presents a promising platform for scalable, integrated nanophotonics.