Tommaso Cassese, Marco Angelo Giambra, Vito Sorianello, Gabriele De Angelis, Michele Midrio, Marianna Pantouvaki, Joris Van Campenhout, Inge Asselberghs, Cedric Huyghebaert, Antonio D’Errico, Marco Romagnoli. Capacitive actuation and switching of add–drop graphene-silicon micro-ring filters[J]. Photonics Research, 2017, 5(6): 762
- Photonics Research
- Vol. 5, Issue 6, 762 (2017)
Fig. 1. (a) Schematic of the SOG capacitor waveguide. (b) Top view (not to scale) of the proposed device. Gray shapes are silicon waveguides, dark gray is the highly p-doped silicon slab, green is graphene, and yellow marks the contacts.
Fig. 2. Optical micrograph picture of the device. Inset shows a detail of the MRR.
Fig. 3. Absorption and effective index of the SOG loaded waveguide at 1.55 μm versus the graphene Fermi level. Blue and red curves are for τ = 300 30 fs
Fig. 4. Simulated transmission at the through (solid lines) and drop (dashed lines) ports of the MRR for different graphene scattering times: (a) τ = 30 300 fs μ = 0.3 eV μ = 0.4 eV μ = 0.5 eV
Fig. 5. Computed graphene Fermi level as a function of the V – V Dirac
Fig. 6. Experimental through (solid lines) and drop (dashed lines) transmission spectra for different V GS V GS = 14 V V GS = 0 V V GS = 14 V
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