Robust Circularly Polarized Luminescence via Quasi-Bound States in the Continuum in Intrinsic Chiral Silicon Metasurfaces
We demonstrate circularly polarized photoluminescence emission, with dissymmetry factors <i>g</i> <sub>PL</sub> over 0.1, from achiral organic dye molecules by leveraging quasi-bound states in the continuum (quasi-BICs) and surface lattice resonances (SLRs) in intrinsic silicon chiral metasurfaces. We find that the <i>g</i> <sub>PL</sub> associated with the quasi-BIC mode remains robust against variations in the emission angle and dye thickness due to its strong lateral field confinement. In contrast, the <i>g</i> <sub>PL</sub> of the SLR mode exhibits sign inversion depending on the emission energy and the dye layer thickness. The experimental results are supported by mode decomposition analysis, helicity density analysis, and the near-field spatial distribution of the electric field. These findings illustrate the relevance of the emitter's layer thickness in optimizing the emission of circularly polarized light. They also elaborate on the robustness of chiral quasi-BICs by comparing the <i>g</i> <sub>PL</sub> of SLRs and quasi-BICs, offering insights into chiral light-matter interactions and advancing the design of circularly polarized light-emitting devices.
Authors
- Beatriz Castillo López de Larrinzar (ORCID: https://orcid.org/0000-0002-3346-0025)
- José A. Sánchez‐Gil (ORCID: https://orcid.org/0000-0002-5370-3717)
- Jaime Gómez Rivas (ORCID: https://orcid.org/0000-0002-8038-0968)
- Shunsuke Murai (ORCID: https://orcid.org/0000-0002-4597-973X)
- José Luis Pura (ORCID: https://orcid.org/0000-0002-8272-527X)
- Minpeng Liang (ORCID: https://orcid.org/0000-0001-8731-195X)
- Yu‐Chen Wei (ORCID: https://orcid.org/0000-0003-4120-0685)
- Sailing He (ORCID: https://orcid.org/0000-0002-3401-1125)
- Antonio García‐Martín (ORCID: https://orcid.org/0000-0002-3248-2708)
- Anton Matthijs Berghuis (ORCID: https://orcid.org/0000-0002-1896-7119)
- Xingyi Zhu (ORCID: https://orcid.org/0000-0001-8907-5022)
Institutions
- Universidad de Valladolid (ES)
- Institute of Micro and Nanotechnology (ES)
- Department of Physics, Mathematics and Informatics (BY)
- Instituto de Estructura de la Materia (ES)
- Osaka Metropolitan University (JP)
- Universidad Autónoma de Madrid (ES)
- Tokyo Metropolitan University (JP)
- Zhejiang University (CN)
- Eindhoven University of Technology (NL)
Publication Details
- Journal
- ACS Photonics
- Published
- 2025-10-27
- DOI
- https://doi.org/10.1021/acsphotonics.5c01966
- Citations
- 2
- Primary Topic
- Metamaterials and Metasurfaces Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.85
Funders
- European Commission
- National Science and Technology Council
- Japan Society for the Promotion of Science
- European Regional Development Fund
- HORIZON EUROPE European Innovation Council