Influences of CO2 laser modification on the surface morphology and optical absorption of graphene thin films

Kehui Jia; Wei Luo; Wei Zhang; Lina Fan; Jianbing Huang

doi:10.1117/1.OE.60.7.077101

5 July 2021 Influences of CO₂ laser modification on the surface morphology and optical absorption of graphene thin films

Kehui Jia, Wei Luo, Wei Zhang, Lina Fan, Jianbing Huang

Author Affiliations +

Optical Engineering, Vol. 60, Issue 7, 077101 (July 2021). https://doi.org/10.1117/1.OE.60.7.077101

Abstract

Abnormal optical absorption phenomena were observed in as-modified few-layer graphene thin films by 10.6-μm CO₂ laser under ambient conditions. Saturable absorption (SA) responses were measured using z-scan technology. The graphene samples showed SA before laser modification, whereas they exhibited reverse SA behavior after laser modification due to the effects of thinning and damage to samples. The shift of 2D peak and appearance of D peak from Raman scattering spectra further confirm the effects of laser irradiation on graphene.

Citation Download Citation

Kehui Jia, Wei Luo, Wei Zhang, Lina Fan, and Jianbing Huang "Influences of CO₂ laser modification on the surface morphology and optical absorption of graphene thin films," Optical Engineering 60(7), 077101 (5 July 2021). https://doi.org/10.1117/1.OE.60.7.077101

Received: 8 January 2021; Accepted: 22 June 2021; Published: 5 July 2021

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