Dynamic Exciton Funneling by Local Strain Control in a Monolayer Semiconductor
| Autor: | Hyowon Moon, Chitraleema Chakraborty, Takashi Taniguchi, Gabriele Grosso, Dirk Englund, Kenji Watanabe, Cheng Peng |
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| Přispěvatelé: | Massachusetts Institute of Technology. Research Laboratory of Electronics, Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Band gap Exciton FOS: Physical sciences Flux Bioengineering 02 engineering and technology Condensed Matter::Materials Science chemistry.chemical_compound Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Monolayer Energy transformation Tungsten diselenide General Materials Science Range (particle radiation) Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter::Other business.industry Mechanical Engineering General Chemistry Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology Condensed Matter Physics Semiconductor chemistry Optoelectronics 0210 nano-technology business |
| Zdroj: | arXiv |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/acs.nanolett.0c02757 |
| Popis: | 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) |
| Databáze: | OpenAIRE |
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