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Nonlinear Photocarrier Dynamics in Multilayer WSe2 Induced by Intense Terahertz Pulses

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https://ir.library.oregonstate.edu/concern/articles/ff365f09h

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Abstract
  • Non-equilibrium photocarriers in multilayer WSe2 injected by femtosecond laser pulses exhibit extraordinary nonlinear dynamics in the presence of intense THz fields. The THz absorption in optically excited WSe2 rises rapidly in the low THz field regime and gradually ramp up at high intensities. The strong THz pulses drive the photocarriers into sidebands of higher mobility and release trapped charge carriers, which consequently enhance the transient conductivity ofWSe2. The spectrally analyzed conductivity reveals distinctive features, indicating that the photocarriers undergo resonant interactions such as carrier-photon scattering.
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DOI
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Journal Volume
  • 40
Journal Issue/Number
  • 12
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  • National Science Foundation (1720633, 1905634)
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Peer Reviewed
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  • 1520-8540

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