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April 2018

To improve the light absorbing capability of graphene, physicists have embedded a graphene sheet within a flat photonic crystal. The physicists have shown that when the temperature of the combination changes, the potential for light absorption can be tuned. They discovered that in the case of normal light incidence, improved absorption occurs at room temperature; however, when there is an increase in temperature, the absorption peak is shifted toward the red light. The researchers concluded that it is possible to control the peak wavelength by altering the incident angle or the temperature, and also the chemical energy potential of graphene.