Room-temperature valley coherence in a polaritonic system
| العنوان: | Room-temperature valley coherence in a polaritonic system |
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| المؤلفون: | Sajal Dhara, Chitraleema Chakraborty, Liangyu Qiu, A. N. Vamivakas |
| المصدر: | Nature Communications, Vol 10, Iss 1, Pp 1-5 (2019) Nature Communications |
| بيانات النشر: | Nature Publishing Group, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 0301 basic medicine, Photon, Quantum decoherence, Science, Exciton, Physics::Optics, General Physics and Astronomy, 02 engineering and technology, Electron, Article, General Biochemistry, Genetics and Molecular Biology, Condensed Matter::Materials Science, 03 medical and health sciences, chemistry.chemical_compound, Valleytronics, Polariton, Tungsten diselenide, lcsh:Science, Physics, Multidisciplinary, Condensed matter physics, General Chemistry, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 021001 nanoscience & nanotechnology, 030104 developmental biology, chemistry, lcsh:Q, 0210 nano-technology, Coherence (physics) |
| الوصف: | The emerging field of valleytronics aims to coherently manipulate an electron and/or hole’s valley pseudospin as an information bearing degree of freedom (DOF). Monolayer transition metal dichalcogenides, due to their strongly bound excitons, their degenerate valleys and their seamless interfacing with photons are a promising candidate for room temperature valleytronics. Although the exciton binding energy suggests room temperature valley coherence should be possible, it has been elusive to-date. A potential solution involves the formation of half-light, half-matter cavity polaritons based on 2D material excitons. It has recently been discovered that cavity polaritons can inherit the valley DOF. Here, we demonstrate the room temperature valley coherence of valley-polaritons by embedding a monolayer of tungsten diselenide in a monolithic dielectric cavity. The extra decay path introduced by the exciton-cavity coupling, which is free from decoherence, is the key to room temperature valley coherence preservation. These observations paves the way for practical valleytronic devices. Owing to the presence of strongly bound excitons and degenerate valleys, monolayer transition metal dichalcogenides show promise for valleytronic applications. Here, the authors embed monolayer WSe2 in a monolithic dielectric cavity, and observe room-temperature valley coherence of valley-polaritons. |
| اللغة: | English |
| تدمد: | 2041-1723 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::727ee43872adc9b0be1ed15561ce56a5 http://link.springer.com/article/10.1038/s41467-019-09490-6 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....727ee43872adc9b0be1ed15561ce56a5 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20411723 |
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