Metal-carbon composite materials containing 10.7 wt% Fe and 12.9 wt% Cu were successfully prepared by impregnation method.The structure,morphology,crystal form and elementary composition of the as-prepared materials were characterized by scanning electron microscope (SEM),X-ray diffraction (XRD),and inductively coupled plasma optical emission spectrometry (ICP-OES),respectively.The nonlinear optical properties of the as-prepared materials were investigated using Z-scan measurements and optical limiting experiments,which indicated that such materials exhibited excellent nonlinear optical properties of reverse saturable absorption.The transmittance of metal-carbon composite materials decreases with an increase in incident light intensity,showing a threshold value in optical limiting of 0.43 J·cm-2,which makes the present materials promising building blocks for optical limiting devices.