Absorption coefficient estimation of thin MoS2 film using attenuation of silicon substrate Raman signal

Title
Absorption coefficient estimation of thin MoS2 film using attenuation of silicon substrate Raman signal
Authors
곽준영
Keywords
MoS2; Absorption coefficient; Substrate Raman; Attenuation
Issue Date
2019-06
Publisher
Results in Physics
Citation
VOL 13-4
Abstract
A simple, non-destructive, and convenient method using Raman spectroscopy and Atomic Force Microscopy for extracting the absorption coefficient of MoS2 is presented. The attenuation of the substrate Raman signal intensity due to the MoS2 overlayer is found to be dependent on the MoS2 film thickness estimated from the AFM measurements. Using the light attenuation model from the measurements, the experimentally extracted absorption coefficient of the thin MoS2 flakes is determined to be 2.8  ×  106  cm− 1. This simple technique is capable of estimating the absorption coefficient of other two-dimensional layered materials.
URI
http://pubs.kist.re.kr/handle/201004/70590
ISSN
2211-3797
Appears in Collections:
KIST Publication > Article
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