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Broadband femtosecond transient absorption spectroscopy for a CVD MoS2 monolayer.
- Source :
-
Physical Review B . Jul2016, Vol. 94 Issue 3, p1-1. 1p. - Publication Year :
- 2016
-
Abstract
- Carrier dynamics in monolayer MoS2 have been investigated using broadband femtosecond transient absorption spectroscopy (FTAS). A tunable pump pulse was used while a broadband probe pulse revealed ground and excited state carrier dynamics. Interestingly, for pump wavelengths both resonant and nonresonant with the A and B excitons, we observe a broad ground state bleach around 2.9 eV, with decay components similar to A and B. Associating this bleach with the band nesting region between K and G in the band structure indicates significant k-space delocalization and overlap among excitonic wave functions identified as A, B, C, and D. Comparison of time dynamics for all features in resonance and nonresonance excitation is consistent with this finding. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MOLYBDENUM disulfide
*CHEMICAL vapor deposition
Subjects
Details
- Language :
- English
- ISSN :
- 24699950
- Volume :
- 94
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Physical Review B
- Publication Type :
- Academic Journal
- Accession number :
- 119473808
- Full Text :
- https://doi.org/10.1103/PhysRevB.94.035445