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ID 115677
著者
Bhamare, Yatin Madhukar Tokushima University
More, M.A. S.P. Pune University
キーワード
Laser ablation
Transient absorption spectroscopy
Optical switching
Ultrafast spectroscopy
Graphite
Graphene
資料タイプ
学術雑誌論文
抄録
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.
掲載誌名
Optical Materials: X
ISSN
25901478
出版者
Elsevier
2
開始ページ
100026
発行日
2019-07-04
権利情報
This is an open access article under the CC BY license(http://creativecommons.org/licenses/by/4.0/).
EDB ID
出版社版DOI
出版社版URL
フルテキストファイル
言語
eng
著者版フラグ
出版社版
部局
理工学系