Electrically controllable chirality in a nanophotonic interface with a 2D semiconductor

Robert Shreiner; Amy Butcher; Kai Hao; Andrew Kindseth; Alexander High

doi:10.1117/12.2650673

17 March 2023 Electrically controllable chirality in a nanophotonic interface with a 2D semiconductor

Robert Shreiner, Amy Butcher, Kai Hao, Andrew Kindseth, Alexander High

Proceedings Volume PC12423, 2D Photonic Materials and Devices VI; (2023) https://doi.org/10.1117/12.2650673
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

I will present two experimental studies that leverage the optically-addressable valley degree of freedom in transition metal dichalcogenide monolayers (TMDs) to locally manipulate the symmetry of optical and magnetic processes. I will discuss our realization of an electrically-tunable chiral nanophotonic interface with a TMD. We fabricate optical waveguides directly on the surface of tungsten diselenide (WSe2) and demonstrate electrically-switchable chiral scattering into the waveguide. We also show that the waveguide acts as a local source for diffusive, spin-polarized excitonic fluxes. Second, I will show that ferromagnetic order in electrostatically-doped TMDs can be controlled by local optical pumping. We observe that interactions between the electrons can effectively amplify an input spin-imbalance. The local control of optical and magnetic symmetry in TMDs can unlock new spin-photonic technologies.

Conference Presentation

Citation Download Citation

Robert Shreiner, Amy Butcher, Kai Hao, Andrew Kindseth, and Alexander High "Electrically controllable chirality in a nanophotonic interface with a 2D semiconductor", Proc. SPIE PC12423, 2D Photonic Materials and Devices VI, (17 March 2023); https://doi.org/10.1117/12.2650673

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