Do, T. T. H., Nonahal, M., Li, C., Valuckas, V., Tan, H. H., Kuznetsov, A. I., Nguyen, H. S., Aharonovich, I., & Ha, S. T. (2024). Room-temperature strong coupling in a single-photon emitter-metasurface system. Nature Communications, 15(1). https://doi.org/10.1038/s41467-024-46544-w
Abstract:
AbstractSolid state single-photon sources with high brightness and long coherence time are promising qubit candidates for modern quantum technology. To prevent decoherence processes and preserve the integrity of the qubits, decoupling the emitters from their surrounding environment is essential. To this end, interfacing single photon emitters (SPEs) with high-finesse cavities is required, especially in the strong coupling regime, when the interaction between emitters can be mediated by cavity fields. However, achieving strong coupling at elevated temperatures is challenging due to competing incoherent processes. Here, we address this long-standing problem by using a quantum system, which comprises a class of SPEs in hexagonal boron nitride and a dielectric cavity based on bound states in the continuum (BIC). We experimentally demonstrate, at room temperature, strong coupling of the system with a large Rabi splitting of ~4 meV thanks to the combination of the narrow linewidth and large oscillator strength of the emitters and the efficient photon trapping of the BIC cavity. Our findings unveil opportunities to advance the fundamental understanding of quantum dynamical system in strong coupling regime and to realise scalable quantum devices capable of operating at room temperature.
License type:
Attribution 4.0 International (CC BY 4.0)
Funding Info:
This research / project is supported by the A*STAR - AME Yong Individual Research Grant
Grant Reference no. : A2084c0177
This research / project is supported by the A*STAR - MTC-Programmatic Fund
Grant Reference no. : M21J9b0085
The Australian Research Council (Grant No. CE200100010, FT220100053 I.A.), the Office of Naval Research Global (Grant No. N62909-22-1-2028, I.A.), French National Research Agency (ANR) under the project POPEYE (Grant No. ANR-17-CE24-0020) and the IDEXLYON from Université de Lyon, Scientific Break-through project TORE within the Programme Investissements d’Avenir (Grant No. ANR-19-IDEX-0005)