Optical response and ground state of graphene

Optical response and excitons in gapped graphene

Coherent nonlinear optical response of graphene.

We investigate the nonlinear optical properties of graphene flakes using four-wave mixing. The corresponding third-order optical susceptibility is found to be remarkably large and only weakly dependent on the wavelength in the near-infrared frequency range. The magnitude of the response is in good agreement with our calculations based on the nonlinear quantum response theory.

Structural and Optical Characterization of ZnO-Graphene Nanocomposite Quantum Dots

In this research, zinc oxide quantum dots and graphene nanocomposites were synthesized via two different methods; In the first (direct) method, ZnO-graphene Nanocomposites were made mixing the synthesized zinc oxide and graphene. In the second (indirect) method, zinc nitrate, graphene, and sodium hydroxide were used to made ZnO-graphene Nanocomposites. XRD, FTIR and Raman spectroscopy analyses ...

Limits to the Optical Response of Graphene and 2D Materials

Owen D. Miller, ∗ Ognjen Ilic, Thomas Christensen, M. T. Homer Reid, Harry A. Atwater, John D. Joannopoulos, Marin Soljačić, and Steven G. Johnson 4 Department of Applied Physics and Energy Sciences Institute, Yale University, New Haven, CT 06511 Department of Applied Physics and Material Science, California Institute of Technology, Pasadena, CA 91125 Department of Physics, Massachusetts Instit...

Structural, Optical and Defect State Analyses of ZnO Nanoparticle Films

Synthesis of ZnO nanostructures films by a co-precipitation followed by the deposition processed onto a glass substrate by spin-coating technique was carried out. The effect of annealing temperatures (from 250 to 325 °C for 30 min) on the structural and optical properties of the ZnO films have been investigated. The structural studies reveal that ZnO films are polycrystalline with hexagonal wur...