Browsing School of Electronic Engineering and Computer Science by Author "Griffiths, JDP"

Now showing items 1-4 of 4

    • Active Polarization Modulation of Terahertz Radiation Using Metamaterial/Graphene-Based Optoelectronic Devices 

      Zaman, AM; Lu, Y; Almond, NW; Burton, OJ; Alexander-Webber, J; Hofmann, S; Mitchell, T; Griffiths, JDP; Beere, HE; Ritchie, DA (2022-01-01)
      We investigate the modulation performance of a metamaterial/graphene optoelectronic device in the THz range. Operating characteristics such as amplitude, phase and polarization modulations of broadband THz radiation are ...

    • Terahertz Metamaterial Optoelectronic Modulators with GHz Reconfiguration Speed 

      Zaman, AM; Lu, Y; Romain, X; Almond, NW; Burton, OJ; Alexander-Webber, J; Hofmann, S; Mitchell, T; Griffiths, JDP; Beere, HE (IEEE, 2022-05-30)
      All-electronic ultrafast control of terahertz radiation is demonstrated in integrated metamaterial/graphene devices. By electrostatic gating the graphene conductivity, the overall optical response of the incident terahertz ...

    • Ultrafast modulation of a THz metamaterial/graphene array integrated device 

      Zaman, AM; Saito, Y; Lu, Y; Kholid, FN; Almond, NW; Burton, OJ; Alexander-Webber, J; Hofmann, S; Mitchell, T; Griffiths, JDP (2022-08-29)
      We report on the ultrafast modulation of a graphene loaded artificial metasurface realized on a SiO2/Si substrate by near-IR laser pump, detected via terahertz probe at the resonant frequency of ∼0.8 THz. The results have ...

    • Versatile and active THz wave polarization modulators using metamaterial/graphene resonators 

      Zaman, AM; Lu, Y; Almond, NW; Burton, OJ; Alexander-Webber, J; Hofmann, S; Mitchell, T; Griffiths, JDP; Beere, HE; Ritchie, DA (Frontiers Media, 2023-01-31)
      Active modification of the polarization state is a key feature for the next-generation of wireless communications, sensing, and imaging in the THz band. The polarization modulation performance of an integrated metamateri ...