دورية أكاديمية
Ultrafast Pump Probe Microscopy on 2D Transition Metal Dichalcogenides
| العنوان: | Ultrafast Pump Probe Microscopy on 2D Transition Metal Dichalcogenides |
|---|---|
| المؤلفون: | Boandoh, S., Hsiao, F. H., Shin, B., Mack, M., Grote, L.P., Wang, R., Han, Y., Lou, J., Koch, N., Nickel, N.H., Luo, C. W., Tsai, Y. T. |
| سنة النشر: | 2022 |
| المجموعة: | Helmholtz Zentrum Berlin (HZB): Publications |
| مصطلحات موضوعية: | ultrafast pump probe microscopy, carrier dynamic distribution, carrier bleaching effect, shape dependent properties, MoS2, WS2 morphology, Applied optics, Photonics, Optics, Light |
| الوصف: | Although microscopic techniques have been used to characterize transition metal dichalcogenides TMDs , direct observation of charge carrier dynamics distribution in TMDs with diverse shapes remains unexplored. Herein, ultrafast pump probe microscopy UPPM is employed to reveal the carrier dynamics distribution in molybdenum disulfide MoS2 and tungsten disulfide WS2 monolayer of four shapes triangular t MoS2 , curved triangular c MoS2 , triangular t WS2 , and hexagonal h WS2 . Monitoring the photon transmission T at 1.55 eV after pumping with a photon energy of 3.1 eV, a negative amp; 916;T T occurs in t MoS2 and c MoS2, while a positive amp; 916;T T is detected in t WS2 and h WS2 after 3 7 ps time evolution. This distinctive behavior is attributed to deep shallow defects below the conduction band minimum CBM in MoS2 and WS2. Spatial independent amp; 916;T T is observed in t MoS2 and t WS2, while the amp; 916;T T in c MoS2 has a rapid decay of photoexcited carriers at the vertices and curved edges. Additionally, a threefold symmetry of amp; 916;T T is revealed in h WS2, attributed to the dissimilar occupation of defect states near the h WS2 CBM. This work paves the way for examining charge carrier dynamics of various shapes of TMDs and provides a unique microscopic method for studying the charge carrier dynamics in emerging TMDs heterostructures |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| العلاقة: | http://www.helmholtz-berlin.de/pubbin/oai_publication?VT=1&ID=106840Test |
| الإتاحة: | https://doi.org/10.1002/adpr.202200046Test http://www.helmholtz-berlin.de/pubbin/oai_publication?VT=1&ID=106840Test |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.94007ACA |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |