Abstract
Optical modulators are essential components in optical communication and photonic neuromorphic networks. Graphene on silicon waveguides have been proposed for optical modulation but the modulation depth is limited to 0.1 dB/ $\mu$ m. Higher modulation depth and shorter modulators can be achieved with plasmonic modes; however, due to its transverse magnetic nature, they weakly interact with graphene. In this contribution, a plasmonic Bloch mode supported by a plasmonic waveguide is used to overcome this problem. Its high in-plane electric field strongly interacts with graphene. Numerical results show modulation depths of 4 dB/ $\mu$ m at 1.65 $\mu$ m with 2.6 dB loss. A subwavelength footprint of 0.5 $\mu$ m $^2$ allows a modulation speed of up to 39 GHz and an energy consumption of 21.2 fJ/b. This sub- $\lambda$ size modulator is a promising candidate for optical communication and neuromorphic circuits.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: IEEE Journal of Selected Topics in Quantum Electronics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.