Nanosecond laser treatment of graphene

Laser processing of graphene is of great interest for cutting, patterning and structural engineering purposes. Tunable nanosecond lasers have the advantage of being relatively widespread (compared to e.g. femtosecond or high-power continuous wave lasers). Hereby we have conducted an investigation of...

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Bibliographic Details
Published in:arXiv.org 2013-06
Main Authors: Kiisk, Valter, Kahro, Tauno, Kozlova, Jekaterina, Matisen, Leonard, Alles, Harry
Format: Article
Language:English
Subjects:
Continuous wave lasers
Femtosecond pulses
Fluorescence
Flux density
Graphene
Impact damage
Laser processing
Lasers
Optical Parametric Oscillators
Parametric amplifiers
Pulse duration
Radiation damage
Scanning electron microscopy
Structural engineering
Ultraviolet radiation
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Summary:Laser processing of graphene is of great interest for cutting, patterning and structural engineering purposes. Tunable nanosecond lasers have the advantage of being relatively widespread (compared to e.g. femtosecond or high-power continuous wave lasers). Hereby we have conducted an investigation of the impact of nanosecond laser pulses on CVD graphene. The damage produced by sufficiently strong single shots (pulse width 5 ns, wavelength 532 or 266 nm) from tunable optical parametric oscillator was investigated by the methods of scanning electron microscopy and optical microspectroscopy (Raman and fluorescence). Threshold of energy density for producing visible damage was found to be ~200 mJ/cm2. For UV irradiation the threshold could be notably less depending on the origin of sample. Surprisingly strong fluorescence signal was recorded from damaged areas and is attributed to the residues of oxidized graphene.
ISSN:2331-8422
DOI:10.48550/arxiv.1306.5062