Plasmonic coupling effect between two gold nanospheres for efficient second-harmonic generation

Ben Li Wang, Ming Liang Ren, Jia Fang Li, Zhi Yuan Li*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The coupling effect between two gold nanospheres (GNSs) is investigated for second-harmonic generation (SHG) in this paper. When the two GNSs approach each other, the coupling effect becomes stronger, and it consequently leads to stronger enhancement of SHG. A strong coupling area between two GNSs is also found. We propose a physical quantity, the coupling strength to describe the coupling effect on SHG enhancement and show that it can fully illustrate the relationship between the SHG enhancement and the gap of two GNSs. Moreover, further calculations reveal the existence of hot spots of both fundamental wave (FW) and excited second harmonic wave in the intermediate region of two GNSs. Our study can not only help to understand the coupling effect on SHG precisely but also offer some possibility to design a nonlinear plasmonic nano-ruler.

Original languageEnglish
Article number083102
JournalJournal of Applied Physics
Volume112
Issue number8
DOIs
Publication statusPublished - 15 Oct 2012
Externally publishedYes

Fingerprint

Dive into the research topics of 'Plasmonic coupling effect between two gold nanospheres for efficient second-harmonic generation'. Together they form a unique fingerprint.

Cite this