2:45 PM - 3:00 PM
[23p-B202-6] Theoretical Study on Microwave and Infrared Photon Absorption Characteristics of Random Stacking Graphene at 300K
Keywords:graphene, absorbance, theoretical calculation
Random Stacking Graphene (RSG) is a muti-layer graphene system having non-periodic stacking structure. It is thought that RSG has graphene layers (GLs) electronically decoupled with each other and that if photo-irradiated it would exhibit a large absorbance (A) due to the photoexcitation of Dirac-cones (DCs) of the GLs. We have theoretically calculated the microwave (MW) and middle-infrared (MIR) As of RSG at 300K. The calculation has clarified that the As of RSG significantly change, depending on the relaxation time (tau) of electrons and holes generated in the DCs by the thermal excitation of the DCs. The calculation has shown that RSG having a long tau of 300fs would exhibit a remarkedly larger MW A than graphite, at 300K. We conclude that RSG having a long tau is an excellent MW and MIR photon absorber, superior to graphite, at room temperature