TY - JOUR
T1 - Simultaneous Surface-Enhanced Resonant Raman and Fluorescence Spectroscopy of Monolayer MoSe2
T2 - Determination of Ultrafast Decay Rates in Nanometer Dimension
AU - Zhang, Yexin
AU - Chen, Wen
AU - Fu, Tong
AU - Sun, Jiawei
AU - Zhang, Daxiao
AU - Li, Yang
AU - Zhang, Shunping
AU - Xu, Hongxing
N1 - Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/9/11
Y1 - 2019/9/11
N2 - The fact that metallic nanostructures are an excellent light receiver and transmitter connects the underlying principles of two widely applied optical processes: surface-enhanced Raman scattering (SERS) and surface-enhanced fluorescence (SEF). A comparative study of SERS and SEF can eliminate the typical unknown quantities of the system and reveal important parameters that cannot be accessed by conventional techniques. Here, we use this simultaneous SERS and SEF technique in a monolayer MoSe2 coupled plasmonic nanocavity. After optimizing the spatial and the spectral overlaps between excitonic and plasmonic resonances, the SERS and SEF enhancement factors can exceed 107 and 6000, respectively, at the same time on the same nanocube. The comparison of the SERS and SEF enhancements allows the estimation of the ultrafast total decay rate of the bright exciton in monolayer MoSe2 in the nanocavity down to tens of femtoseconds, which is otherwise hard to realize using time-resolved techniques.
AB - The fact that metallic nanostructures are an excellent light receiver and transmitter connects the underlying principles of two widely applied optical processes: surface-enhanced Raman scattering (SERS) and surface-enhanced fluorescence (SEF). A comparative study of SERS and SEF can eliminate the typical unknown quantities of the system and reveal important parameters that cannot be accessed by conventional techniques. Here, we use this simultaneous SERS and SEF technique in a monolayer MoSe2 coupled plasmonic nanocavity. After optimizing the spatial and the spectral overlaps between excitonic and plasmonic resonances, the SERS and SEF enhancement factors can exceed 107 and 6000, respectively, at the same time on the same nanocube. The comparison of the SERS and SEF enhancements allows the estimation of the ultrafast total decay rate of the bright exciton in monolayer MoSe2 in the nanocavity down to tens of femtoseconds, which is otherwise hard to realize using time-resolved techniques.
KW - Surface-enhanced Raman scattering
KW - light-matter interaction
KW - plasmonic nanocavity
KW - surface-enhanced fluorescence
KW - total decay rate
KW - transition metal dichalcogenides
UR - https://www.scopus.com/pages/publications/85072133610
U2 - 10.1021/acs.nanolett.9b02425
DO - 10.1021/acs.nanolett.9b02425
M3 - 文章
C2 - 31430168
AN - SCOPUS:85072133610
SN - 1530-6984
VL - 19
SP - 6284
EP - 6291
JO - Nano Letters
JF - Nano Letters
IS - 9
ER -