SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 25: Solid State Quantum Optics
Q 25.6: Vortrag
Mittwoch, 8. März 2023, 12:15–12:30, E001
Simulation of waveguide coupled single and double layer graphene electro-optic modulators — •Pawan Kumar Dubey1, Ashraful Islam Raju1, Rasuole Lukose1, Christian Wenger1,2, and Mindaugas Lukosius1 — 1IHP- Leibniz Institut für innovative Mikroelektronik, Im Technologiepark 25, 15236 Frankfurt (Oder), Germany — 2BTU Cottbus Senftenberg, Platz der Deutschen Einheit 1, 03046 Cottbus, Germany
On-chip integrated, graphene-based optical modulator has the advantages of a small device footprint, low power consumption and low drive voltage, enabling it to be used in micrometer-scale optical interconnect. One of the very first single-layer graphene modulator was experimentally demonstrated in 2011 by Liu et al.[1], with a modulation depth of 0.1db/µm and a 3dB bandwidth of 1.2 GHz. Over the decade, there have been improvements in the performance with the double-layer design, in which a dielectric layer between the two successive graphene layers was introduced. It has the potential to significantly improve modulation depth, modulation efficiency and bandwidth of the operation. In this study, we present simulated results about, ridge and buried waveguide coupled double layer graphene modulators along with the effect of material and thickness of spacer layer between two graphene layers. Our simulation demonstrates a modulation depth of, 0.17db/µm, which is 70% higher than the single-layer design. We also demonstrate a 3dB bandwidth of 40 GHz and power consumption less than 1Pj/bit.