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.
core +1 more source
Spectral self-action of THz emission from ionizing two-color laser pulses in gases [PDF]
, 2014 The spectrum of terahertz (THz) emission in gases via ionizing two-color femtosecond pulses is analyzed by means of a semi-analytic model and finite-difference-time-domain simulations in 1D and 2D geometries.
Babushkin, Ihar +4 more
core +7 more sources
Broadband, high power THz source at 540 kHz using organic crystal BNA
APL Photonics, 2023 We demonstrate efficient optical rectification in the organic crystal BNA (N-benzyl-2-methyl-4-nitroaniline), driven by a temporally compressed, commercially available industrial Yb-laser system operating at a 540 kHz repetition rate. Our terahertz (THz)
Samira Mansourzadeh +5 more
doaj +1 more source
Photonics, 2022 Terahertz wave generation through the optical rectification of 780 nm femtosecond laser pulses in ZnGeP2 crystals has been studied. All of the possible interactions of types I and II were analyzed by modeling and experimentally.
Vladimir Voevodin +4 more
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Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics
Advanced Functional Materials, EarlyView.Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha +18 more
wiley +1 more source
Population inversion in optically pumped asymmetric quantum well terahertz lasers [PDF]
, 1997 Intersubband carrier lifetimes and population ratios are calculated for three- and four-level optically pumped terahertz laser structures. Laser operation is based on intersubband transitions between the conduction band states of asymmetric GaAs-Ga(1 – x)
Babiker M. +7 more
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Spectrum of Terahertz Emission from Single-Color Filament Plasma under Different Laser Beam Focusing
Photonics, 2023 The spectrum of terahertz radiation generated in plasma of a single-color laser filament is observed, using a new technique based on obtaining two-dimensional angular distributions at different frequencies.
Georgy Rizaev +2 more
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Advanced Functional Materials, EarlyView.Viscoelasticity‐driven instabilities are harnessed to create tunable, periodic textures in 3D‐printed liquid crystalline polymers. This study illustrates how processing parameters control these spontaneous meso‐scale patterns. These unique structural architectures unlock new possibilities for functional devices, ranging from photonic components to ...
Miaomiao Zou +17 more
wiley +1 more source
High energy terahertz pulses from organic crystals: DAST and DSTMS pumped at Ti:sapphire wavelength
, 2013 High energy terahertz pulses are produced by optical rectification (OR) in organic crystals DAST and DSTMS by a Ti:sapphire amplifier system centered at 0.8 microns.
Hauri, C. P. +3 more
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Wide frequency tuning of continuous terahertz wave generated by difference frequency mixing under exciton-excitation conditions in a GaAs/AlAs multiple quantum well [PDF]
, 2018 Continuous terahertz wave sources with narrow bandwidth and wide frequency tunability enable high-resolution terahertz spectroscopy and high-speed information communication.
Clarke, Edmund +7 more
core +3 more sources