Coherence in resonance fluorescence
Abstract Resonance fluorescence of a two-level emitter displays persistently anti-bunching irrespective of the excitation intensity, but inherits the driving laser’s linewidth under weak monochromatic excitation. These properties are commonly explained in terms of two disjoined pictures, i.e., the e...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-07-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-61884-x |
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| _version_ | 1849234727994654720 |
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| author | Xu-Jie Wang Guoqi Huang Ming-Yang Li Yuan-Zhuo Wang Li Liu Bang Wu Hanqing Liu Haiqiao Ni Zhichuan Niu Weijie Ji Rongzhen Jiao Hua-Lei Yin Zhiliang Yuan |
| author_facet | Xu-Jie Wang Guoqi Huang Ming-Yang Li Yuan-Zhuo Wang Li Liu Bang Wu Hanqing Liu Haiqiao Ni Zhichuan Niu Weijie Ji Rongzhen Jiao Hua-Lei Yin Zhiliang Yuan |
| author_sort | Xu-Jie Wang |
| collection | DOAJ |
| description | Abstract Resonance fluorescence of a two-level emitter displays persistently anti-bunching irrespective of the excitation intensity, but inherits the driving laser’s linewidth under weak monochromatic excitation. These properties are commonly explained in terms of two disjoined pictures, i.e., the emitter’s single photon saturation or passively scattering light. Here, we propose a unified model that treats all fluorescence photons as spontaneous emission, one at a time, and can explain simultaneously both the spectral and correlation properties of the emission. We theoretically derive the excitation power dependencies, measurable at the single-photon incidence level, of the first-order coherence of the whole resonance fluorescence and super-bunching of the spectrally filtered, followed by experimental confirmation on a semiconductor quantum dot micro-pillar device. Furthermore, our model explains peculiar coincidence bunching observed in phase-dependent two-photon interference experiments. Our work provides an intuitive understanding of coherent light-matter interaction and may stimulate new applications. |
| format | Article |
| id | doaj-art-d72f75b917254f4184b77b0d5cfddd67 |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-d72f75b917254f4184b77b0d5cfddd672025-08-20T04:03:02ZengNature PortfolioNature Communications2041-17232025-07-011611810.1038/s41467-025-61884-xCoherence in resonance fluorescenceXu-Jie Wang0Guoqi Huang1Ming-Yang Li2Yuan-Zhuo Wang3Li Liu4Bang Wu5Hanqing Liu6Haiqiao Ni7Zhichuan Niu8Weijie Ji9Rongzhen Jiao10Hua-Lei Yin11Zhiliang Yuan12Beijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesNational Laboratory of Solid State Microstructures and School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing UniversityNational Laboratory of Solid State Microstructures and School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing UniversityBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesState Key Laboratory of Optoelectronic Materials and Devices, Institute of Semiconductors, Chinese Academy of SciencesState Key Laboratory of Optoelectronic Materials and Devices, Institute of Semiconductors, Chinese Academy of SciencesState Key Laboratory of Optoelectronic Materials and Devices, Institute of Semiconductors, Chinese Academy of SciencesBeijing Academy of Quantum Information SciencesSchool of Science, Beijing University of Posts and TelecommunicationsBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesAbstract Resonance fluorescence of a two-level emitter displays persistently anti-bunching irrespective of the excitation intensity, but inherits the driving laser’s linewidth under weak monochromatic excitation. These properties are commonly explained in terms of two disjoined pictures, i.e., the emitter’s single photon saturation or passively scattering light. Here, we propose a unified model that treats all fluorescence photons as spontaneous emission, one at a time, and can explain simultaneously both the spectral and correlation properties of the emission. We theoretically derive the excitation power dependencies, measurable at the single-photon incidence level, of the first-order coherence of the whole resonance fluorescence and super-bunching of the spectrally filtered, followed by experimental confirmation on a semiconductor quantum dot micro-pillar device. Furthermore, our model explains peculiar coincidence bunching observed in phase-dependent two-photon interference experiments. Our work provides an intuitive understanding of coherent light-matter interaction and may stimulate new applications.https://doi.org/10.1038/s41467-025-61884-x |
| spellingShingle | Xu-Jie Wang Guoqi Huang Ming-Yang Li Yuan-Zhuo Wang Li Liu Bang Wu Hanqing Liu Haiqiao Ni Zhichuan Niu Weijie Ji Rongzhen Jiao Hua-Lei Yin Zhiliang Yuan Coherence in resonance fluorescence Nature Communications |
| title | Coherence in resonance fluorescence |
| title_full | Coherence in resonance fluorescence |
| title_fullStr | Coherence in resonance fluorescence |
| title_full_unstemmed | Coherence in resonance fluorescence |
| title_short | Coherence in resonance fluorescence |
| title_sort | coherence in resonance fluorescence |
| url | https://doi.org/10.1038/s41467-025-61884-x |
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