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ID 115677
Author
Bhamare, Yatin Madhukar Tokushima University
More, M.A. S.P. Pune University
Keywords
Laser ablation
Transient absorption spectroscopy
Optical switching
Ultrafast spectroscopy
Graphite
Graphene
Content Type
Journal Article
Description
Carbon based materials are considered as a rewarding contestant for optical devices due to its novel properties. In this study, graphite is laser-ablated and different analytical methods such as XRD and Raman spectroscopy are used to evaluate the crystalline nature. In XRD, it indicates the decreased intensity after laser ablation but no change in peak positions resulted as graphite is very strong and hard material. Scanning electron microscopy (SEM) used to evaluate structural characteristics shows the overlapping layered structure after ablation. Reduced graphene oxide (rGO) is prepared by using modified Hummers' method and reduced it by thermal reduction method. UV–Vis spectra confirmed the peaks of graphite and rGO at 274 nm and 267 nm, respectively. To study the carrier relaxation dynamics of graphite and rGO, ultrafast Visible-pump/NIR-probe femtosecond transient absorption spectroscopy was used. Carrier relaxation occurred between 260 and 309 fs even after laser ablation damage, which is useful for future application of optical switching under high laser repetition.
Journal Title
Optical Materials: X
ISSN
25901478
Publisher
Elsevier
Volume
2
Start Page
100026
Published Date
2019-07-04
Rights
This is an open access article under the CC BY license(http://creativecommons.org/licenses/by/4.0/).
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
Publisher
departments
Science and Technology