Tunable tapered waveguide for efficient compression of light to graphene surface plasmons

Bo Han Cheng, Hong Wen Chen, Yi Jun Jen, Yung Chiang Lan, Din Ping Tsai

研究成果: Article同行評審

4 引文 斯高帕斯(Scopus)

摘要

Dielectric-graphene-dielectric (DGD) structure has been widely used to construct optical devices at infrared region with features of small footprint and low-energy dissipation. The optical properties of graphene can be manipulated by changing its chemical potential by applying a biased voltage onto graphene. However, the excitation efficiency of surface wave on graphene by end-fire method is very low because of large wavevector mismatch between infrared light and surface wave. In this paper, a dielectric-semiconductor-dielectric (DSD) tapered waveguide with magnetic tunability for efficient excitation of surface waves on DGD at infrared region is proposed and analyzed. Efficient excitation of surface waves on DGD with various chemical potentials in graphene layer and incident frequencies can be attained by merely changing the external magnetic field applied onto the DSD tapered waveguide. The electromagnetic simulations verify the design of the proposed structure. More importantly, the constituent materials used in the proposed structure are available in nature. This work opens the door toward various applications in the field of using surface waves.

原文English
文章編號28799
期刊Scientific reports
6
DOIs
出版狀態Published - 2016 6月 29

All Science Journal Classification (ASJC) codes

  • 多學科

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