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Nonlinear and non-Hermitian functionalities in integrated nanophotonics (Conference Presentation)
Author(s): Masaya Notomi

Paper Abstract

We are pursuing novel functionalities arising from unique capabilities of integrated nanophotonics. In this invited talk, we will introduce our recent two results. First one is a combination of graphene with ultra-narrow plasmonic waveguides efficiently coupled to Si waveguides. This device enables ultrafast all-optical switching with substantially small energy consumption, thanks to unique optical nonlinearity of graphene and ultrastrong light confinement in plasmonic waveguides integrated with efficient mode converters. Second one is based on a periodic modulation of non-Hermitian optical property, namely, a periodic array of gain and loss nanocavities. We will show that such non-Hermitian array leads to strange optical dispersion and nontrivial topological insulating phase, which are fully reconfigurable by controlling the injection current.

Paper Details

Date Published: 9 September 2019
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Proc. SPIE 11081, Active Photonic Platforms XI, 110810H (9 September 2019); doi: 10.1117/12.2529075
Show Author Affiliations
Masaya Notomi, NTT Basic Research Labs. (Japan)
Tokyo Institute of Technology (Japan)


Published in SPIE Proceedings Vol. 11081:
Active Photonic Platforms XI
Ganapathi S. Subramania; Stavroula Foteinopoulou, Editor(s)

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