Results 21 to 30 of about 36,720 (261)
Control of transverse mode content and polarization structure of terahertz coherent beams [PDF]
Компьютерная оптика, 2019 The paper is devoted to investigation of forming multimode coherent beams of terahertz radiation with pre-given transverse mode content and terahertz vector beams by use of silicon diffractive optical elements forming single modes from terahertz free ...
Vladimir Pavelyev +4 more
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APL Photonics, 2023 Terahertz quantum cascade laser sources based on intra-cavity Cherenkov difference-frequency generation in dual-wavelength mid-infrared quantum cascade lasers are currently the only monolithic semiconductor laser technology that can deliver continuous ...
Wolfhard Oberhausen +7 more
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Resonant plasma excitation by single-cycle THz pulses [PDF]
, 2018 In this paper, an alternative perspective for the generation of millimetric high-gradient resonant plasma waves is discussed. This method is based on the plasma-wave excitation by energetic single-cycle THz pulses whose temporal length is comparable to ...
Curcio, A. +4 more
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Results in Optics, 2023 The present study proposes a methodology for improving terahertz (THz) radiation through the utilisation of a laser directed towards a graphene strip that has been coated onto a GaAs structure.
Sandeep, Hitendra K. Malik
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Observation of a cascaded process in intracavity terahertz optical parametric oscillators based on lithium niobate [PDF]
, 2013 Cascaded difference frequency generation has been observed in intracavity optical parametric oscillators based on bulk lithium niobate and producing nanosecond pulses of terahertz radiation.
Dunn, M. H., Thomson, C. L.
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Spatial-energy characteristics of focused modes of a metal terahertz laser resonator [PDF]
Радиофизика и электроника, 2019 Subject and ppurpose. In this paper, the spatial-energy characteristics of laser beams with inhomogeneous spatial polarization with their moderate and sharp focusing are theoretically investigated.
S.A. Vlasenko +3 more
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Self-consistent scattering model of carrier dynamics in GaAs-AlGaAs terahertz quantum-cascade lasers [PDF]
, 2003 Intersubband electron scattering transport in terahertz GaAs–AlGaAs quantum cascade lasers is analyzed, using a full 13-level self-consistent rate equation model.
Harrison, P. +3 more
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Optimization of photomixers and antennas for continuous-wave terahertz emission [PDF]
, 2005 We have studied terahertz emission from interdigitated finger photomixers coupled to planar antenna structures. Using both pulsed and continuous-wave excitation, polarization measurements reveal that the antenna design dominates the properties of the
Baker, C. +7 more
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Strong Anisotropy in Liquid Water upon Librational Excitation using Terahertz Laser Fields
, 2020 Tracking the excitation of water molecules in the homogeneous liquid is challenging due to the ultrafast dissipation of rotational excitation energy through the hydrogen-bonded network.
Adams, Ellen M. +12 more
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Coherent phonon induced optical modulation in semiconductors at terahertz frequencies [PDF]
, 2013 The coherent modulation of electronic and vibrational nonlinearities in atoms and molecular gases by intense few-cycle pulses has been used for high-harmonic generation in the soft X-ray and attosecond regime, as well as for Raman frequency combs that ...
Constantinescu Anca Monia +4 more
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