Plasmon excitation on flat graphene by s-polarized beams using four-wave mixing

• المؤلفون الرئيسيون: Tao, Jin, Dong, Zhaogang, Yang, Joel K. W., Wang, Qi Jie
• مؤلفون آخرون: School of Electrical and Electronic Engineering
• التنسيق: مقال
• اللغة: English
• منشور في: 2016
• الموضوعات: Integrated optics devices; Waveguides; Nonlinear optics; Surface plasmons
• الوصول للمادة أونلاين: https://hdl.handle.net/10356/82822; http://hdl.handle.net/10220/40316
• المؤسسة: Nanyang Technological University

Graphene plasmons have received significant attention recently due to its attractive properties such as high spatial confinement and tunability. However, exciting plasmons on graphene effectively still remains a challenge owing to the large wave-vector mismatch between the optical beam in air and graphene plasmon. In this paper, we present a novel scheme capable of exciting graphene surface plasmons (GSPs) on a flat suspended graphene by using only s-polarized optical beams through four-wave mixing (FWM) process, where the GSPs fields were derived analytically based on the Green's function analysis, under the basis of momentum conservation. By incorporating the merits of nonlinear optics, the presented scheme avoids any patterning of either graphene or substrate. We believe that the proposed scheme potentially paves the way towards an efficient pure optical excitation, switching and modulation of GSPs for realizing graphene-based nano-photonic and optoelectronic integrated circuits.