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| Autors principals: | , , , , , |
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| Format: | Preprint |
| Publicat: |
2024
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| Matèries: | |
| Accés en línia: | https://arxiv.org/abs/2402.17536 |
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| _version_ | 1866913245455974400 |
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| author | Kaiser, Katharina Rosławska, Anna Romeo, Michelangelo Scheurer, Fabrice Neuman, Tomáš Schull, Guillaume |
| author_facet | Kaiser, Katharina Rosławska, Anna Romeo, Michelangelo Scheurer, Fabrice Neuman, Tomáš Schull, Guillaume |
| contents | Controlling electrically-stimulated quantum light sources (QLS) is key for developing integrated and low-scale quantum devices. The mechanisms leading to quantum emission are complex, as a large number of electronic states of the system impacts the emission dynamics. Here, we use a scanning tunneling microscope (STM) to excite a model QLS, namely a single molecule. The luminescence spectra reveal two lines, associated to the emission of the neutral and positively charged molecule, both exhibiting single-photon source behavior. In addition, we find a correlation between the charged and neutral molecule's emission, the signature of a photon cascade. By adjusting the charging/discharging rate, we can control these emission statistics. This generic strategy is further established by a rate equation model revealing the complex internal dynamics of the molecular junction. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_17536 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Electrically driven cascaded photon-emission in a single molecule Kaiser, Katharina Rosławska, Anna Romeo, Michelangelo Scheurer, Fabrice Neuman, Tomáš Schull, Guillaume Mesoscale and Nanoscale Physics Controlling electrically-stimulated quantum light sources (QLS) is key for developing integrated and low-scale quantum devices. The mechanisms leading to quantum emission are complex, as a large number of electronic states of the system impacts the emission dynamics. Here, we use a scanning tunneling microscope (STM) to excite a model QLS, namely a single molecule. The luminescence spectra reveal two lines, associated to the emission of the neutral and positively charged molecule, both exhibiting single-photon source behavior. In addition, we find a correlation between the charged and neutral molecule's emission, the signature of a photon cascade. By adjusting the charging/discharging rate, we can control these emission statistics. This generic strategy is further established by a rate equation model revealing the complex internal dynamics of the molecular junction. |
| title | Electrically driven cascaded photon-emission in a single molecule |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2402.17536 |