Photonic-circuited resonance fluorescence of single molecules with an ultrastable lifetime-limited transition

Penglong Ren, Shangming Wei, Weixi Liu, Shupei Lin, Zhaohua Tian, Tailin Huang, Jianwei Tang (), Yaocheng Shi () and Xue-Wen Chen ()
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Penglong Ren: Huazhong University of Science and Technology
Shangming Wei: Huazhong University of Science and Technology
Weixi Liu: Zhejiang University, Zijingang Campus
Shupei Lin: Huazhong University of Science and Technology
Zhaohua Tian: Huazhong University of Science and Technology
Tailin Huang: Huazhong University of Science and Technology
Jianwei Tang: Huazhong University of Science and Technology
Yaocheng Shi: Zhejiang University, Zijingang Campus
Xue-Wen Chen: Huazhong University of Science and Technology

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract Resonance fluorescence as the emission of a resonantly-excited two-level quantum system promises indistinguishable single photons and coherent high-fidelity quantum-state manipulation of the matter qubit, which underpin many quantum information processing protocols. Real applications of the protocols demand high degrees of scalability and stability of the experimental platform, and thus favor quantum systems integrated on one chip. However, the on-chip solution confronts several formidable challenges compromising the scalability prospect, such as the randomness, spectral wandering and scattering background of the integrated quantum systems near heterogeneous and nanofabricated material interfaces. Here we report an organic-inorganic hybrid integrated quantum photonic platform that circuits background-free resonance fluorescence of single molecules with an ultrastable lifetime-limited transition. Our platform allows a collective alignment of the dipole orientations of many isolated molecules with the photonic waveguide. We demonstrate on-chip generation, beam splitting and routing of resonance-fluorescence single photons with a signal-to-background ratio over 3000 in the waveguide at the weak excitation limit. Crucially, we show the photonic-circuited single molecules possess a lifetime-limited-linewidth transition and exhibit inhomogeneous spectral broadenings of only about 5% over hours’ measurements. These findings and the versatility of our platform pave the way for scalable quantum photonic networks.

Date: 2022
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DOI: 10.1038/s41467-022-31603-x

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