Dynamic Exciton Funneling by Local Strain Control in a Monolayer Semiconductor
The ability to control excitons in semiconductors underlies numerous proposed applications, from excitonic circuits to energy transport. Two dimensional (2D) semiconductors are particularly promising for room-temperature applications due to their large exciton binding energy and enormous stretchabil...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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American Chemical Society (ACS)
2021
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| Online Access: | https://hdl.handle.net/1721.1/129595 |
| _version_ | 1826215143971749888 |
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| author | Moon, Hyowon Chakraborty, Chitraleema Peng, Cheng Englund, Dirk R. |
| author2 | Massachusetts Institute of Technology. Research Laboratory of Electronics |
| author_facet | Massachusetts Institute of Technology. Research Laboratory of Electronics Moon, Hyowon Chakraborty, Chitraleema Peng, Cheng Englund, Dirk R. |
| author_sort | Moon, Hyowon |
| collection | MIT |
| description | The ability to control excitons in semiconductors underlies numerous proposed applications, from excitonic circuits to energy transport. Two dimensional (2D) semiconductors are particularly promising for room-temperature applications due to their large exciton binding energy and enormous stretchability. Although the strain-induced static exciton flux has been observed in predetermined structures, dynamic control of exciton flux represents an outstanding challenge. Here, we introduce a method to tune the bandgap of suspended 2D semiconductors by applying a local strain gradient with a nanoscale tip. This strain allows us to locally and reversibly shift the exciton energy and to steer the exciton flux over micrometer-scale distances. We anticipate that our result not only marks an important experimental tool but will also open a broad range of new applications from information processing to energy conversion. |
| first_indexed | 2024-09-23T16:17:15Z |
| format | Article |
| id | mit-1721.1/129595 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T16:17:15Z |
| publishDate | 2021 |
| publisher | American Chemical Society (ACS) |
| record_format | dspace |
| spelling | mit-1721.1/1295952022-09-29T19:25:03Z Dynamic Exciton Funneling by Local Strain Control in a Monolayer Semiconductor Moon, Hyowon Chakraborty, Chitraleema Peng, Cheng Englund, Dirk R. Massachusetts Institute of Technology. Research Laboratory of Electronics Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science The ability to control excitons in semiconductors underlies numerous proposed applications, from excitonic circuits to energy transport. Two dimensional (2D) semiconductors are particularly promising for room-temperature applications due to their large exciton binding energy and enormous stretchability. Although the strain-induced static exciton flux has been observed in predetermined structures, dynamic control of exciton flux represents an outstanding challenge. Here, we introduce a method to tune the bandgap of suspended 2D semiconductors by applying a local strain gradient with a nanoscale tip. This strain allows us to locally and reversibly shift the exciton energy and to steer the exciton flux over micrometer-scale distances. We anticipate that our result not only marks an important experimental tool but will also open a broad range of new applications from information processing to energy conversion. United States. Army Research Office. Multidisciplinary University Research Initiative (Grant W911NF-18-1-0431) National Science Foundation (U.S.). Emerging Frontiers & Multidisciplinary Activities. Quantum Optoelectronics, Magnetoelectronics and Plasmonics in 2-Dimensional Materials Heterostructures (Award Abstract 1542863) CREST (Grant JPMJCR15F3) 2021-01-29T15:14:16Z 2021-01-29T15:14:16Z 2020-08 2020-12-14T19:09:50Z Article http://purl.org/eprint/type/JournalArticle 1530-6984 https://hdl.handle.net/1721.1/129595 Moon, Hyowon et al. “Dynamic Exciton Funneling by Local Strain Control in a Monolayer Semiconductor.” Nano Letters, 20, 9 (August 2020): 6791–6797 © 2020 The Author(s) en 10.1021/acs.nanolett.0c02757 Nano Letters Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf American Chemical Society (ACS) arXiv |
| spellingShingle | Moon, Hyowon Chakraborty, Chitraleema Peng, Cheng Englund, Dirk R. Dynamic Exciton Funneling by Local Strain Control in a Monolayer Semiconductor |
| title | Dynamic Exciton Funneling by Local Strain Control in a Monolayer Semiconductor |
| title_full | Dynamic Exciton Funneling by Local Strain Control in a Monolayer Semiconductor |
| title_fullStr | Dynamic Exciton Funneling by Local Strain Control in a Monolayer Semiconductor |
| title_full_unstemmed | Dynamic Exciton Funneling by Local Strain Control in a Monolayer Semiconductor |
| title_short | Dynamic Exciton Funneling by Local Strain Control in a Monolayer Semiconductor |
| title_sort | dynamic exciton funneling by local strain control in a monolayer semiconductor |
| url | https://hdl.handle.net/1721.1/129595 |
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