A theoretical analysis of quantum-corrected model in metal nanowire dimer

作者：Niu Kaikun; Wu Bo; Huang Zhixiang

来源：2016 Progress In Electromagnetics Research Symposium, PIERS 2016, 2016-08-08 to 2016-08-11.

DOI：10.1109/PIERS.2016.7735397

• Classical electrodynamics
• Finite different time domain method
• Interacting system
• Local dielectrics
• Metallic nanowires
• Optical cross sections
• Quantum-mechanical calculation
• Variable separation

Using a quantum-corrected model, the optical cross section of a strongly coupled metallic nanowire dimer for variable separation widths of the junction between the nanowires is analysed by finite-different time-domain method. Numerical results show the classical electrodynamics fails to describe the coupling across sub-nanometer gaps, owing to non-local screening and the spill-out of electrons, where quantum effects become important. The quantum-corrected model approach models the junction between adjacent nanoparticles by means of a local dielectric response that includes electron tunnelling and tunnelling resistivity at the gap. The quantum-corrected model predicts optical properties in excellent agreement with fully quantum mechanical calculations for small interacting systems, opening a new venue for addressing quantum effects in realistic plasmonic systems.

• 出版日期2016
• 单位安徽大学