• 文献标题:   Design of a Graphene Modulator Based on a Hybrid Plasmonic Horizontal Slot Waveguide
  • 文献类型:   Article
  • 作  者:   CHEN W, DONG X, XU Y, GAO Y, WANG F, SUN XQ, ZHANG DM
  • 作者关键词:   graphene modulator, hybrid plasmonic effect, scattering optical los, thermal oxidation
  • 出版物名称:   IEEE PHOTONICS JOURNAL
  • ISSN:   1943-0655 EI 1943-0647
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1109/JPHOT.2021.3115100
  • 出版年:   2021

▎ 摘  要

An electrical absorption graphene modulator based on hybrid plasmonic waveguide is theoretically demonstrated. The sidewall scattering loss is mostly restrained by the vertical metal-insulator-silicon (MIS) waveguide structure. The patterned Si3N4 (SiN) can both serve as the mask and the insulation layer, which offers the direct formation of silicon stripe by thermal oxidization. The metal cap layer utilized as an electrode is favorable to improve the frequency response. By finite element method (FEM) optimization of waveguide dimensions, the 700 nm-wide optical 3 dB-bandwidth that ranges from 1200 to 1900 nm can be obtained at the modulation length of 30 mu m. The propagation loss is reduced to 0.088 dB/mu m. The modulation depth and power consumption are calculated to be 0.509 dB/mu m and 61.3 fJ/bit, respectively. The estimated electrical 3 dB-bandwidth of 330 GHz promises the proposed modulator potentials in next generation on-chip optical signal processing.