Deng, H; Manrique, DZ; Chen, X; Panoiu, NC; Ye, F; (2018) Quantum mechanical analysis of nonlinear optical response of interacting graphene nanoflakes. APL Photonics , 3 (1) , Article 016102. 10.1063/1.5009600.

Preview

Text Panoiu_Quantum mechanical analysis of nonlinear optical response of interacting graphene nanoflakes_VoR.pdf - Published Version Download (1MB) | Preview

Abstract

We propose a distant-neighbor quantum-mechanical (DNQM) approach to study the linear and nonlinear optical properties of graphene nanoflakes (GNFs). In contrast to the widely used tight-binding description of the electronic states that considers only the nearest-neighbor coupling between the atoms, our approach is more accurate and general, as it captures the electron-core interactions between all atoms in the structure. Therefore, as we demonstrate, the DNQM approach enables the investigation of the optical coupling between two closely separated but chemically unbound GNFs. We also find that the optical response of GNFs depends crucially on their shape, size, and symmetry properties. Specifically, increasing the size of nanoflakes is found to shift their accommodated quantum plasmon oscillations to lower frequency. Importantly, we show that by embedding a cavity into GNFs, one can change their symmetry properties, tune their optical properties, or enable otherwise forbidden second-harmonic generation processes.

Download activity - last month

Export as XMLCSVJSON

Download activity - last 12 months

Export as XMLCSVJSON

Downloads by country - last 12 months

Export as JSONXMLCSV

Archive Staff Only

View Item