Results 41 to 50 of about 36,720 (261)
Intense terahertz laser fields on a two-dimensional electron gas with Rashba spin-orbit coupling
, 2004 The spin-dependent density of states and the density of spin polarization of an InAs-based two-dimensional electron gas with the Rashba spin-orbit coupling under an intense terahertz laser field are investigated by utilizing the Floquet states to solve ...
J. L. Cheng, M. W. Wu, Xu J. Z.
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Field-resolved high-order sub-cycle nonlinearities in a terahertz semiconductor laser
Light: Science & Applications, 2021 Two-dimensional terahertz strong-field spectroscopy reveals wave-mixing processes up to eighth order in a free-running quantum cascade laser, unraveling its sub-cycle gain dynamics and nonlinearities in a regime of negative absorption.
J. Riepl +13 more
doaj +1 more source
Theoretical analysis of spectral gain in a THz quantum cascade laser: prospects for gain at 1 THz
, 2003 In a recent Letter [Appl. Phys. Lett. 82, 1015 (2003)], Williams et al. reported the development of a terahertz quantum cascade laser operating at 3.4 THz or 14.2 meV.
Lee, S. -C., Wacker, A.
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Population-inversion and gain estimates for a semiconductor TASER [PDF]
, 2001 We have investigated a solid-state design advanced (see Soref et al, in SPIE Proceedings, vol. 3795, p, 516, 1999) to achieve a terahertz-amplification-by-the-stimulated-emision-of-radiation (TASER), The original design was based on light-to heavy-hole ...
Harrison, P., Soref, R.A.
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Subwavelength micropillar array terahertz lasers
Optics Express, 2014 We report on micropillar-based terahertz lasers with active pillars that are much smaller than the emission wavelength. These micropillar array lasers correspond to scaled-down band-edge photonic crystal lasers forming an active photonic metamaterial.
Michael, Krall +7 more
openaire +2 more sources
PROSPECTS OF THE USE OF GRADIENT GRATES IN THE LASERS OF TERAHERTZ RANGE [PDF]
Radio Physics and Radio Astronomy, 2018 Purpose: The improvement and development of terahertz radiation sources is required for the further development of the terahertz frequency range. Submillimeter lasers are one of the few sources of terahertz radiation.
M. I. Dzyubenko +3 more
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Laser power-meter comparison at far-infrared wavelengths and terahertz frequencies [PDF]
, 2012 We have evaluated the responsivity of seven different thermal detectors compared to an electrically calibrated photoacoustic reference detector at 119 µm (2.5 THz) and 394 µm (0.76 THz) laser wavelengths.
Betz, Kerry +4 more
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Broadband terahertz wave generation from an epsilon-near-zero material
Light: Science & Applications, 2021 Terahertz radiation: thin film enhancement A new method for generating terahertz waves exploits the low-permittivity properties of an ultrathin film.
Wenhe Jia +13 more
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Laser‐Driven Strong‐Field Terahertz Sources
Advanced Optical Materials, 2019 AbstractA review on the recent development of intense laser‐driven terahertz (THz) sources is provided here. The technologies discussed include various types of sources based on optical rectification (OR), spintronic emitters, and laser‐filament‐induced plasma. The emphasis is on OR using pump pulses with tilted intensity front.
Fülöp, József András +2 more
openaire +3 more sources
MicromachinesWe present a method for real-time terahertz imaging that employs a hydrogen cyanide (HCN) laser as a terahertz source at 0.89 THz and an AlGaN/GaN high-electron-mobility transistor (HEMT) terahertz detector as a camera.
Nu Zhang +6 more
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