2D Semiconductor Nonlinear Plasmonic Modulators

A plasmonic modulator is a device that controls the amplitude or phase of propagating plasmons. In a pure plasmonic modulator, the presence or absence of a pump plasmonic wave controls the amplitude of a probe plasmonic wave through a channel. This control has to be mediated by an interaction betwee...

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Bibliographic Details
Published in:arXiv.org 2019-02
Main Authors: Klein, Matthew, Badada, Bekele H, Binder, Rolf, Alfrey, Adam, McKie, Max, Koehler, Michael R, Mandrus, David G, Taniguchi, Takashi, Watanabe, Kenji, LeRoy, Brian J, Schaibley, John R
Format: Article
Language:English
Subjects:
Amplitudes
Modulators
Plasmons
Polaritons
Online Access:Get full text
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Summary:A plasmonic modulator is a device that controls the amplitude or phase of propagating plasmons. In a pure plasmonic modulator, the presence or absence of a pump plasmonic wave controls the amplitude of a probe plasmonic wave through a channel. This control has to be mediated by an interaction between disparate plasmonic waves, typically requiring the integration of a nonlinear material. In this work, we demonstrate the first 2D semiconductor nonlinear plasmonic modulator based on a WSe2 monolayer integrated on top of a lithographically defined metallic waveguide. We utilize the strong coupling between the surface plasmon polaritons, SPPs, and excitons in the WSe2 to give a 73 percent change in transmission through the device. We demonstrate control of the propagating SPPs using both optical and SPP pumps, realizing the first demonstration of a 2D semiconductor nonlinear plasmonic modulator, with a modulation depth of 4.1 percent, and an ultralow switching energy estimated to be 40 aJ.
ISSN:2331-8422
DOI:10.48550/arxiv.1902.04626