Optical Injection and Detection of Long-Lived Interlayer Excitons in van der Waals Heterostructures
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866908586153607168 |
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| author | Tüğen, Alperen Seiler, Anna M. Christianen, Arthur Watanabe, Kenji Taniguchi, Takashi Kroner, Martin İmamoğlu, Ataç |
| author_facet | Tüğen, Alperen Seiler, Anna M. Christianen, Arthur Watanabe, Kenji Taniguchi, Takashi Kroner, Martin İmamoğlu, Ataç |
| contents | Interlayer excitons in semiconducting bilayers separated by insulating hBN layers constitute a promising platform for investigation of strongly correlated bosonic phases. Here, we report an optical method for the generation and characterization of long-lived interlayer excitons. We confirm the presence of tightly bound interlayer excitons by measuring 1s and 2s intralayer excitons in each layer concurrently. Using a pump-probe technique, we find interlayer exciton lifetimes up to 8.8 $μ$s, increasing with the thickness of the hBN. With optical access to long-lived interlayer excitons, our approach provides a new route to explore degenerate Bose--Fermi mixtures of excitons and itinerant electrons with high spatial and temporal resolution. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_06098 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Optical Injection and Detection of Long-Lived Interlayer Excitons in van der Waals Heterostructures Tüğen, Alperen Seiler, Anna M. Christianen, Arthur Watanabe, Kenji Taniguchi, Takashi Kroner, Martin İmamoğlu, Ataç Mesoscale and Nanoscale Physics Strongly Correlated Electrons Interlayer excitons in semiconducting bilayers separated by insulating hBN layers constitute a promising platform for investigation of strongly correlated bosonic phases. Here, we report an optical method for the generation and characterization of long-lived interlayer excitons. We confirm the presence of tightly bound interlayer excitons by measuring 1s and 2s intralayer excitons in each layer concurrently. Using a pump-probe technique, we find interlayer exciton lifetimes up to 8.8 $μ$s, increasing with the thickness of the hBN. With optical access to long-lived interlayer excitons, our approach provides a new route to explore degenerate Bose--Fermi mixtures of excitons and itinerant electrons with high spatial and temporal resolution. |
| title | Optical Injection and Detection of Long-Lived Interlayer Excitons in van der Waals Heterostructures |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2506.06098 |