Ultrafast nanoscale exciton dynamics via laser-combined scanning tunneling microscopy in atomically thin materials
Abstract Long-term stable excitons, bound pairs of electrons and holes, in van der Waals materials were found to be handled at room temperature, paving the way to develop optoelectronic/photonic devices for future high-speed communication technology. To miniaturize and integrate such functions to ac...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2022-10-01
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| Series: | npj 2D Materials and Applications |
| Online Access: | https://doi.org/10.1038/s41699-022-00345-1 |
| _version_ | 1798029845856256000 |
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| author | Hiroyuki Mogi Yusuke Arashida Ryusei Kikuchi Ryosuke Mizuno Jun Wakabayashi Naoki Wada Yasumitsu Miyata Atsushi Taninaka Shoji Yoshida Osamu Takeuchi Hidemi Shigekawa |
| author_facet | Hiroyuki Mogi Yusuke Arashida Ryusei Kikuchi Ryosuke Mizuno Jun Wakabayashi Naoki Wada Yasumitsu Miyata Atsushi Taninaka Shoji Yoshida Osamu Takeuchi Hidemi Shigekawa |
| author_sort | Hiroyuki Mogi |
| collection | DOAJ |
| description | Abstract Long-term stable excitons, bound pairs of electrons and holes, in van der Waals materials were found to be handled at room temperature, paving the way to develop optoelectronic/photonic devices for future high-speed communication technology. To miniaturize and integrate such functions to achieve highly efficient excitonic devices, understanding and manipulation of exciton dynamics in the nanoscale structures is absolutely essential. Since the spatial resolution of the optical techniques, which have been mainly used in the research of this field, is limited to μm to several tens of nm, the introduction of new technology is strongly desired. Here, we demonstrate a method to probe and visualize neutral excitons using the laser-combined multiprobe scanning tunneling microscopy (STM) system. Ultrafast dynamics of excitons in the nanostructures produced in an in-plane WS2/WSe2 heterostructure, such as dynamics in the ps region of many-body effects under high density and spatial variation in the effect of local defects on lifetime, was successfully revealed with a spatial resolution of 1 nm order. This method is expected to accelerate research on exciton dynamics and the development of applications directly based on the experimental results of nanoscale. |
| first_indexed | 2024-04-11T19:31:54Z |
| format | Article |
| id | doaj.art-7762a28e1f81492aaebcedd9c6c38ad1 |
| institution | Directory Open Access Journal |
| issn | 2397-7132 |
| language | English |
| last_indexed | 2024-04-11T19:31:54Z |
| publishDate | 2022-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj 2D Materials and Applications |
| spelling | doaj.art-7762a28e1f81492aaebcedd9c6c38ad12022-12-22T04:06:58ZengNature Portfolionpj 2D Materials and Applications2397-71322022-10-016111010.1038/s41699-022-00345-1Ultrafast nanoscale exciton dynamics via laser-combined scanning tunneling microscopy in atomically thin materialsHiroyuki Mogi0Yusuke Arashida1Ryusei Kikuchi2Ryosuke Mizuno3Jun Wakabayashi4Naoki Wada5Yasumitsu Miyata6Atsushi Taninaka7Shoji Yoshida8Osamu Takeuchi9Hidemi Shigekawa10Faculty of pure and applied sciences, University of TsukubaFaculty of pure and applied sciences, University of TsukubaFaculty of pure and applied sciences, University of TsukubaFaculty of pure and applied sciences, University of TsukubaFaculty of pure and applied sciences, University of TsukubaDepartment of Physics, Tokyo Metropolitan UniversityDepartment of Physics, Tokyo Metropolitan UniversityFaculty of pure and applied sciences, University of TsukubaFaculty of pure and applied sciences, University of TsukubaFaculty of pure and applied sciences, University of TsukubaFaculty of pure and applied sciences, University of TsukubaAbstract Long-term stable excitons, bound pairs of electrons and holes, in van der Waals materials were found to be handled at room temperature, paving the way to develop optoelectronic/photonic devices for future high-speed communication technology. To miniaturize and integrate such functions to achieve highly efficient excitonic devices, understanding and manipulation of exciton dynamics in the nanoscale structures is absolutely essential. Since the spatial resolution of the optical techniques, which have been mainly used in the research of this field, is limited to μm to several tens of nm, the introduction of new technology is strongly desired. Here, we demonstrate a method to probe and visualize neutral excitons using the laser-combined multiprobe scanning tunneling microscopy (STM) system. Ultrafast dynamics of excitons in the nanostructures produced in an in-plane WS2/WSe2 heterostructure, such as dynamics in the ps region of many-body effects under high density and spatial variation in the effect of local defects on lifetime, was successfully revealed with a spatial resolution of 1 nm order. This method is expected to accelerate research on exciton dynamics and the development of applications directly based on the experimental results of nanoscale.https://doi.org/10.1038/s41699-022-00345-1 |
| spellingShingle | Hiroyuki Mogi Yusuke Arashida Ryusei Kikuchi Ryosuke Mizuno Jun Wakabayashi Naoki Wada Yasumitsu Miyata Atsushi Taninaka Shoji Yoshida Osamu Takeuchi Hidemi Shigekawa Ultrafast nanoscale exciton dynamics via laser-combined scanning tunneling microscopy in atomically thin materials npj 2D Materials and Applications |
| title | Ultrafast nanoscale exciton dynamics via laser-combined scanning tunneling microscopy in atomically thin materials |
| title_full | Ultrafast nanoscale exciton dynamics via laser-combined scanning tunneling microscopy in atomically thin materials |
| title_fullStr | Ultrafast nanoscale exciton dynamics via laser-combined scanning tunneling microscopy in atomically thin materials |
| title_full_unstemmed | Ultrafast nanoscale exciton dynamics via laser-combined scanning tunneling microscopy in atomically thin materials |
| title_short | Ultrafast nanoscale exciton dynamics via laser-combined scanning tunneling microscopy in atomically thin materials |
| title_sort | ultrafast nanoscale exciton dynamics via laser combined scanning tunneling microscopy in atomically thin materials |
| url | https://doi.org/10.1038/s41699-022-00345-1 |
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