terahertz (THz) sources
Laterally pumped GaAs/AlGaAs quantum wells as sources of broadband terahertz radiation
... emission-based sources like LED devices. The total op- tical output power at 7 THz is limited due to the cubic de- pendence of the spontaneous emission on the subband energy ...7 THz still exceeds, ...
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Modelling, design and characterisation of terahertz photoconductive antennas
... the THz measurement setup, which are based upon the laser excitation sources, as shown in ...the THz signal can be detected. In THz antennas based upon photoconduction technique, for ...
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Electrical and radiation characteristics of semilarge photoconductive terahertz emitters
... of terahertz power with a bandwidth of 6 THz ...large-gap sources, high terahertz powers can be produced using unamplified mode-locked femtosecond ...
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Extraction-controlled terahertz frequency quantum cascade lasers with a diagonal LO-phonon extraction and injection stage
... 1.2 THz to 5.2 THz [6, 7], and the maximum peak output power has reached ...establish THz QCLs as promising sources for many applications including THz spectroscopy, remote sensing and ...
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Origin of terminal voltage variations due to self mixing in terahertz frequency quantum cascade lasers
... semiconductor sources of terahertz (THz) frequency radiation that are capable of emission powers of up to 1 W [1] and maximum operating temperatures of 200 K ...to THz radiation, coupled with ...
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Generation of THz frequency using PANDA ring resonator for THz imaging
... Nonlinear terahertz (THz) radiation is the electromagnetic spectrum which ranges from 30 THz to 100 ...thermal sources produced weak, incoherent radiation. THz radiation gives rise to ...
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Progress in compact room temperature THz radiation sources
... compounds. THz high-resolution molecular spectroscopy makes it possible to study very diverse objects, from the biological to the cosmic scales – including the absorption and emission spectra of human tissue as ...
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Terahertz Wave Generation via Nonlinear Parametric Process from ε GaSe Single Crystals Grown by Liquid Phase Solution Method
... The THz output peak power was estimated with the calibrated Si bolometer and black polyethylene filter, which blocked the pump and signal ...highest THz peak power of 3 mW was achieved when the external ...
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On the thermal dependence of the generation of terahertz radiation by photomixing
... 3 THz, where many materials show spectroscopic fingerprints but packaging and cloths are ...Scientifically, terahertz radiation is important for spectroscopic investigations and characterization of modern ...
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Laser Feedback Interferometry as a Tool for Analysis of Granular Materials at Terahertz Frequencies: Towards Imaging and Identification of Plastic Explosives
... However, there is a large class of systems which are granular in nature, including plastic explosives, where the internal dielectric heterogeneity creates electromagnetic response very different from those of its ...
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Optimization of micromachined relex klystrons for operation at terahertz frequencies
... tances given by (where is an integer and is the velocity of incident electrons), there is no velocity modu- lation and particle behavior is the same as if the resonant cavity was not present. To obtain significant ac ...
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Resonant−phonon depopulation terahertz quantum cascade lasers and their application in spectroscopic imaging
... the terahertz (THz) region of the electromagnetic spectrum (frequency f ~ 300 GHz−10 THz; wavelength λ ~ 1000−30 m; energy ~ 1−40 meV), which is historically the least explored region of the ...
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A review of disintegration mechanisms and measurement techniques
... As highlighted in the previous section, the bioavailability of the dosage form can be significantly influenced by the GI environment. Several research groups investigated regional differences in the GI to gain more ...
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Teraherz vibrational spectroscopy of E coli and molecular constituents: Computational modeling and experiment
... the THz radiation propagates through an entire object, allowing the genetic material and proteins all contribute to the THz signature of bacteria or ...between THz radiation and bio- logical ...
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Plastic fiber design for THz generation through wavelength translation
... of Terahertz (THz) radiation or T-rays extends from 0.1 to 10 THz (3 mm to 30 µm), a range that bridges the gap (sometimes known as the THz gap) between microwaves and infrared light ...where ...
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Volume and surface mode coupling experiments in periodic surface structures for use in mm-THz high power radiation sources
... Metamaterials, or artificial surfaces, are defined by their exact subwavelength structure and are engineered to exhibit exciting and intriguing phenomena that do not exist in natural materials. Rapidly progressing ...
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Bandwidth Enhancement of RMPA Using 2 Segment Labyrinth Metamaterial at THz
... The past few years have been very eventful with respect to the evolution of the concept and implementation of “left- handed materials (LHMs)”. This paper elucidates antenna parameter optimization using 2 Segment ...
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Monitoring leaf water content with THz and sub-THz waves
... detecting THz pulses are photoconductive antennas ...one terahertz pulse for each incoming light ...the terahertz pulses to induce a ...the THz pulse and record its shape in the time ...a ...
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Design of a Polymer-Based Hollow-Core Bandgap Fiber for Low-Loss Terahertz Transmission
... The cross-section of the HC-mPOF is optimized by investigating its band-structure by the PWE method using the commercially available software RSoft ® . Although higher values of d /Λ can yield a stronger band-gap effect, ...
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Volatolomics analysis of lung and colon cancer using terahertz and infrared spectroscopy
... Spektroskopi terahertz dan inframerah merupakan teknik spektroskopik analitikal yang efektif dalam mengenalpasti dan mengkaji struktur interaksi molekul bagi sesuatu ...spektroskopi Terahertz domain masa ...
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