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Authors = NiclasWesterberg

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10 pages, 2810 KiB  
Article
Phase-Insensitive Scattering of Terahertz Radiation
by Mihail Petev, NiclasWesterberg, Eleonora Rubino, Daniel Moss, Arnaud Couairon, François Légaré, Roberto Morandotti, Daniele Faccio and Matteo Clerici
Photonics 2017, 4(1), 7; https://doi.org/10.3390/photonics4010007 - 31 Jan 2017
Cited by 5 | Viewed by 8411
Abstract
The nonlinear interaction between Near-Infrared (NIR) and Terahertz pulses is principally investigated as a means for the detection of radiation in the hardly accessible THz spectral region. Most studies have targeted second-order nonlinear processes, given their higher efficiencies, and only a limited number [...] Read more.
The nonlinear interaction between Near-Infrared (NIR) and Terahertz pulses is principally investigated as a means for the detection of radiation in the hardly accessible THz spectral region. Most studies have targeted second-order nonlinear processes, given their higher efficiencies, and only a limited number have addressed third-order nonlinear interactions, mainly investigating four-wave mixing in air for broadband THz detection. We have studied the nonlinear interaction between THz and NIR pulses in solid-state media (specifically diamond), and we show how the former can be frequency-shifted up to UV frequencies by the scattering from the nonlinear polarisation induced by the latter. Such UV emission differs from the well-known electric field-induced second harmonic (EFISH) one, as it is generated via a phase-insensitive scattering, rather than a sum- or difference-frequency four-wave-mixing process. Full article
(This article belongs to the Special Issue Ultrafast Photonics and Attosecond Sciences)
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