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Enhancement of Nonlinearity by Terahertz Vortex Beam

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Abstract

High-power THz vortex beam was generated based on optical rectification in nonlinear optical crystal and mode conversion by employing a polymeric spiral phase plate. Subsequent application of THz vortex beam for nonlinear spectroscopy in graphene shows interesting enhanced nonlinear characteristics.

© 2018 The Author(s)

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