Enhanced plasmonic light absorption engineering of graphene: simulation by boundary-integral spectral element method.


Journal Article

Graphene's relatively poor absorption is an essential obstacle for designing graphene-based photonic devices with satisfying photo-responsivity. To enhance the tunable light absorption of graphene, appropriate excitation of localized surface plasmon resonance is considered as a promising approach. In this work, the strategy of incorporating periodic cuboid gold nanoparticle (NP) cluster arrays and cylindrical gold NP arrays with Bragg reflectors into graphene-based photodetectors are theoretically studied by the boundary-integral spectral element method (BI-SEM). With the BI-SEM, the models can be numerically analyzed with excellent accuracy and efficiency. Numerical simulation shows that the proposed structures can effectively engineer the light absorption in graphene by tuning plasmon resonance. In the spectra of 300 nm to 1000 nm, a maximum light absorption of 67.54% is observed for the graphene layer with optimal parameters of the photodetector model.

Full Text

Duke Authors

Cited Authors

  • Niu, J; Luo, M; Zhu, J; Liu, QH

Published Date

  • February 2015

Published In

Volume / Issue

  • 23 / 4

Start / End Page

  • 4539 - 4551

PubMed ID

  • 25836491

Pubmed Central ID

  • 25836491

Electronic International Standard Serial Number (EISSN)

  • 1094-4087

International Standard Serial Number (ISSN)

  • 1094-4087

Digital Object Identifier (DOI)

  • 10.1364/oe.23.004539


  • eng