Abstract
The graphene oxide (GO) is successfully prepared from a purified natural graphite through a pressurized oxidation method. We experimentally demonstrate that GO as an optical media can be used for spatial light modulation based on plasma channels induced by femtosecond pulses. The modulated beam exhibits good propagation properties in free space. It is easy to realize the spatial modulation on the probe beam at a high concentration of GO dispersion solutions, high power and smaller pulse width of the pump beam. We also find that the spatial modulation on the probe beam can be conveniently adjusted through the power and pulse width of pump lasers, dispersion solution concentration.
Highlights
Graphene, a two-dimensional carbon nanomaterial composed of carbon atoms, has a thickness of single atomic layer, the lateral size can reach to microns or even to millimeters
We demonstrate a novel method for spatial light modulation based on plasma channels generated in the graphene oxide (GO) dispersion solution
We experimentally show the spatial light modulation on the probe beam based on plasma channels generated in the GO dispersion solution
Summary
A two-dimensional carbon nanomaterial composed of carbon atoms, has a thickness of single atomic layer, the lateral size can reach to microns or even to millimeters. In the last few years, graphenes and GO materials have received enormous interest from the scientific community due to their extraordinary mechanical [1,2], electronic [3,4], optical [5,6], and electrochemical properties [7]. Liu et al first experimentally report a high-performance, waveguide-integrated electroabsorption modulator based on monolayer graphene [22]. We demonstrate a novel method for spatial light modulation based on plasma channels generated in the GO dispersion solution. We experimentally show the spatial light modulation on the probe beam based on plasma channels generated in the GO dispersion solution. We study the propagation characters of modulated beam in the free space
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