Phase-insensitive scattering of terahertz radiation

Petev, M., Westerberg, N. , Rubino, E., Moss, D., Couairon, A., Légaré, F., Morandotti, R., Faccio, D. and Clerici, M. (2017) Phase-insensitive scattering of terahertz radiation. Photonics Spectra, 4(1), 7. (doi: 10.3390/photonics4010007)

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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.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Clerici, Professor Matteo and Faccio, Professor Daniele and Westerberg, Dr Niclas
Authors: Petev, M., Westerberg, N., Rubino, E., Moss, D., Couairon, A., Légaré, F., Morandotti, R., Faccio, D., and Clerici, M.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Physics and Astronomy
Journal Name:Photonics Spectra
Publisher:Laurin Publishing Co., Inc.
Published Online:31 January 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Photonics Spectra 4(1):7
Publisher Policy:Reproduced under a Creative Commons License
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
727471Quantum-enhanced THz spectroscopy and imagingMatteo ClericiEngineering & Physical Sciences Research Council (EPSRC)EP/P009697/1ENG - ENGINEERING ELECTRONICS & NANO ENG