Nanosecond laser treatment of graphene

Abstract

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.

References in corpus (6)

• The Raman Fingerprint of Graphene
• Graphene Photonics and Optoelectronics
• Quantifying defects in graphene via Raman spectroscopy at different excitation energies
• Raman Spectroscopy of Graphene Edges
• Laser-induced disassembly of a graphene single crystal into a nano-crystalline network
• Response of graphene to femtosecond high-intensity laser irradiation

Cited by in corpus (5)

• Patterning and tuning of electrical and optical properties of graphene by laser induced two-photon oxidation
• Nonlinear atom-plasmon interactions enabled by nanostructured graphene
• Dissipative plasmon solitons in graphene nanodisk arrays
• Surface plasmon launching by polariton superradiance
• Cascaded third harmonic generation in hybrid graphene-semiconductor waveguides