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Laser Induced Fluorescence Measurement Of Plasma Plume During Pulsed Laser Deposition Of Diamond-Like Carbon

Published online by Cambridge University Press:  10 February 2011

Yukihiko Yamagata ,
Yuji Kozai ,
Fumiaki Mitsugi ,
Tomoaki Ikegami ,
Kenji Ebihara ,
Ajay Sharma ,
Robert M. Mayo  and
Jagdish Narayan
Yukihiko Yamagata
Affiliation:
Department of Electrical and Computer Engineering, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, JAPAN
Yuji Kozai
Affiliation:
Department of Electrical and Computer Engineering, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, JAPAN
Fumiaki Mitsugi
Affiliation:
Department of Electrical and Computer Engineering, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, JAPAN
Tomoaki Ikegami
Affiliation:
Department of Electrical and Computer Engineering, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, JAPAN
Kenji Ebihara
Affiliation:
Department of Electrical and Computer Engineering, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, JAPAN
Ajay Sharma
Affiliation:
NSF Center of Advanced Materials and Smart Structures, North Carolina State University, Raleigh, NC 27695-7916, U.S.A
Robert M. Mayo
Affiliation:
Department of Nuclear Engineering, North Carolina State University, Raleigh, NC 27695-7909, U.S.A
Jagdish Narayan
Affiliation:
NSF Center of Advanced Materials and Smart Structures, North Carolina State University, Raleigh, NC 27695-7916, U.S.A
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Abstract

Dynamics of carbon ablation plasma plume during the preparation of diamond-like carbon films by KrF excimer pulsed laser deposition was investigated using laser induced fluorescence (LIF) and optical emission spectroscopy. LIF signal from C2molecule (Swan band, d 3Φg – a3Φu) was detected using a photomultiplier tube and an intensified CCD camera. Temporal evolution and spatial distribution of C2 molecules in the ablated plume were measured as a function of laser energy density and ablation area. LIF intensity is found to be weaker in the central part of the plume than that at the periphery at incident energy greater than 6 J/cm2. It is conjectured that some of C2molecules are dissociated by collision with energetic species in central part of the ablation plume. Dynamics of ablation plasma plume is strongly dependent on the size of ablated area.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 617: Symposium J – Laser-Solid Interactionsfor Materials Processing , 2000 , J3.4
Copyright
Copyright © Materials Research Society 2000

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