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Ultrafast near-field dynamics of polariton-exciton in WSe2 slab waveguides at room temperature

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Abstract

We observe the propagation of an exciton-polariton wave in a WSe2 nanometric slab. We directly visualize with unprecedented spatio-temporal resolution (50 nm, <70 fs) a strikingly slow polaritonic wave with a velocity of ~ 0.017c.

© 2018 The Author(s)

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