2012/07/13 by Wenbin Gong, Gong, Wenbin
Neuroscience · Physics and Astronomy · #FOS: Physical sciences #Laser-Matter Interactions and Applications #Materials Science (cond-mat.mtrl-sci) #Photoreceptor and optogenetics research #Popular Physics (physics.pop-ph) #Spectroscopy and Quantum Chemical Studies #cond-mat.mtrl-sci #physics.pop-ph
paper · pdf · doi:10.48550/arxiv.1207.3131
openalex publication_date 2012/07/13 · arxiv created 2012/08/15 · arxiv updated 2012/08/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Graphene-metal compound structure has been reported as a novel and outstanding component used in electrical and optical devices. We report on a first-principles study of graphene-cu compound structure, showing its capacity of converting laser energy into electrical power and storing the harvested energy for a long time. A real-time and real-space time-dependent density functional method (TDDFT) is applied for the simulation of electrons dynamics and energy absorption. The laser-induced charge transfer from copper layer to graphene layer is observed and represented by plane-averaged electron difference and dipoles. The effects of laser frequency on the excitation energy and charge transfer are studied as well. The enhancement of C-C σ-bond and decreasing of electron density corresponding to π-bond within graphene layer indicate the way in which the transferred-charges are stored. In addition, the shift and oscillations of dipole along z-direction after the application of laser pulse offer a concept that the compound structure has the ability of storing the harvested energy for a long time.