Spatial quantum-interference landscapes of multi-site-controlled quantum dots coupled to extended photonic cavity modes
Abstract A compact platform to integrate emitters in a cavity-like support is to embed quantum dots (QDs) in a photonic crystal (PhC) structure, making them promising candidates for integrated quantum photonic circuits. The emission properties of QDs can be modified by tailored photonic structures,...
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Nature Portfolio
2025-04-01
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| Series: | Communications Physics |
| Online Access: | https://doi.org/10.1038/s42005-025-02051-y |
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| author | Jiahui Huang Alessio Miranda Wei Liu Xiang Cheng Benjamin Dwir Alok Rudra Kai-Chi Chang Eli Kapon Chee Wei Wong |
| author_facet | Jiahui Huang Alessio Miranda Wei Liu Xiang Cheng Benjamin Dwir Alok Rudra Kai-Chi Chang Eli Kapon Chee Wei Wong |
| author_sort | Jiahui Huang |
| collection | DOAJ |
| description | Abstract A compact platform to integrate emitters in a cavity-like support is to embed quantum dots (QDs) in a photonic crystal (PhC) structure, making them promising candidates for integrated quantum photonic circuits. The emission properties of QDs can be modified by tailored photonic structures, relying on the Purcell effect or strong light-matter interactions. However, the effects of photonic states on spatial features of exciton emissions in these systems are rarely explored. Such effect is difficult to access due to random positions of self-assembled QDs in PhC structures, and the fact that quantum well excitons’ wavefunctions resemble photonic states in a conventional distributed Bragg reflector cavity system. In this work, we instead observe a spatial signature of exciton emission using site-controlled QDs embedded in PhC cavities. In particular, we observe the detuning-dependent spatial repulsion of the QD exciton emissions by polarized imaging of the micro-photoluminescence, dependent on the controlled QD’s position in a spatially extended photonic pattern. The observed effect arises due to the quantum interference between QD decay channel in a spatially-extended cavity mode. Our findings suggest that integration of site-controlled QDs in tailored photonic structures can enable spatially distributed single-photon sources and photon switches. |
| format | Article |
| id | doaj-art-b90ba13118f845f09e2cd4ad1799a704 |
| institution | OA Journals |
| issn | 2399-3650 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Physics |
| spelling | doaj-art-b90ba13118f845f09e2cd4ad1799a7042025-08-20T02:11:47ZengNature PortfolioCommunications Physics2399-36502025-04-018111110.1038/s42005-025-02051-ySpatial quantum-interference landscapes of multi-site-controlled quantum dots coupled to extended photonic cavity modesJiahui Huang0Alessio Miranda1Wei Liu2Xiang Cheng3Benjamin Dwir4Alok Rudra5Kai-Chi Chang6Eli Kapon7Chee Wei Wong8Mesoscopic Optics and Quantum Electronics Laboratory, Department of Electrical and Computer Engineering, University of CaliforniaInstitute of Physics, École Polytechnique Fédérale de LausanneMesoscopic Optics and Quantum Electronics Laboratory, Department of Electrical and Computer Engineering, University of CaliforniaMesoscopic Optics and Quantum Electronics Laboratory, Department of Electrical and Computer Engineering, University of CaliforniaInstitute of Physics, École Polytechnique Fédérale de LausanneInstitute of Physics, École Polytechnique Fédérale de LausanneMesoscopic Optics and Quantum Electronics Laboratory, Department of Electrical and Computer Engineering, University of CaliforniaInstitute of Physics, École Polytechnique Fédérale de LausanneMesoscopic Optics and Quantum Electronics Laboratory, Department of Electrical and Computer Engineering, University of CaliforniaAbstract A compact platform to integrate emitters in a cavity-like support is to embed quantum dots (QDs) in a photonic crystal (PhC) structure, making them promising candidates for integrated quantum photonic circuits. The emission properties of QDs can be modified by tailored photonic structures, relying on the Purcell effect or strong light-matter interactions. However, the effects of photonic states on spatial features of exciton emissions in these systems are rarely explored. Such effect is difficult to access due to random positions of self-assembled QDs in PhC structures, and the fact that quantum well excitons’ wavefunctions resemble photonic states in a conventional distributed Bragg reflector cavity system. In this work, we instead observe a spatial signature of exciton emission using site-controlled QDs embedded in PhC cavities. In particular, we observe the detuning-dependent spatial repulsion of the QD exciton emissions by polarized imaging of the micro-photoluminescence, dependent on the controlled QD’s position in a spatially extended photonic pattern. The observed effect arises due to the quantum interference between QD decay channel in a spatially-extended cavity mode. Our findings suggest that integration of site-controlled QDs in tailored photonic structures can enable spatially distributed single-photon sources and photon switches.https://doi.org/10.1038/s42005-025-02051-y |
| spellingShingle | Jiahui Huang Alessio Miranda Wei Liu Xiang Cheng Benjamin Dwir Alok Rudra Kai-Chi Chang Eli Kapon Chee Wei Wong Spatial quantum-interference landscapes of multi-site-controlled quantum dots coupled to extended photonic cavity modes Communications Physics |
| title | Spatial quantum-interference landscapes of multi-site-controlled quantum dots coupled to extended photonic cavity modes |
| title_full | Spatial quantum-interference landscapes of multi-site-controlled quantum dots coupled to extended photonic cavity modes |
| title_fullStr | Spatial quantum-interference landscapes of multi-site-controlled quantum dots coupled to extended photonic cavity modes |
| title_full_unstemmed | Spatial quantum-interference landscapes of multi-site-controlled quantum dots coupled to extended photonic cavity modes |
| title_short | Spatial quantum-interference landscapes of multi-site-controlled quantum dots coupled to extended photonic cavity modes |
| title_sort | spatial quantum interference landscapes of multi site controlled quantum dots coupled to extended photonic cavity modes |
| url | https://doi.org/10.1038/s42005-025-02051-y |
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