Results 301 to 310 of about 179,343 (322)
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International Journal of Infrared and Millimeter Waves, 2005
Modern Terahertz-subTerahertz (THz-subTHz) spectrometers, based on continuously frequency-tunable coherent sources of radiation, the backward-wave oscillators (BWOs), are described which cover the frequencies v = 1 cm−1 − 50 cm−1 (0.03 − 1.5 THz) and allow for measurements at temperatures 2 − 1000 K, also in magnetic fields.
Gorshunov, B. P. +7 more
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Modern Terahertz-subTerahertz (THz-subTHz) spectrometers, based on continuously frequency-tunable coherent sources of radiation, the backward-wave oscillators (BWOs), are described which cover the frequencies v = 1 cm−1 − 50 cm−1 (0.03 − 1.5 THz) and allow for measurements at temperatures 2 − 1000 K, also in magnetic fields.
Gorshunov, B. P. +7 more
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Terahertz interface physics: from terahertz wave propagation to terahertz wave generation
Journal of Physics D: Applied Physics, 2022Abstract Terahertz (THz) interface physics as a new interdiscipline between the THz technique and condensed matter physics has undergone rapid development in recent years. In particular, the development of advanced materials, such as graphene, transitional metal dichalcogenides, topological insulators, ferromagnetic metals, and ...
Wanyi Du +3 more
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2008 33rd International Conference on Infrared, Millimeter and Terahertz Waves, 2008
We present a concept for the design of photoconductive antennas which allows the generation and detection of terahertz radiation pulses of freely selectable modes. We demonstrate the principle by showing electric field distributions for vector beams, namely the lowest order Gaussian-Bessel beams. They have a donut-like intensity distribution and either
Winnerl, S. +4 more
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We present a concept for the design of photoconductive antennas which allows the generation and detection of terahertz radiation pulses of freely selectable modes. We demonstrate the principle by showing electric field distributions for vector beams, namely the lowest order Gaussian-Bessel beams. They have a donut-like intensity distribution and either
Winnerl, S. +4 more
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Reconfigurable Terahertz Metamaterials
Physical Review Letters, 2009We demonstrate reconfigurable anisotropic metamaterials at terahertz frequencies where artificial "atoms" reorient within unit cells in response to an external stimulus. This is accomplished by fabricating planar arrays of split ring resonators on bimaterial cantilevers designed to bend out of plane in response to a thermal stimulus.
Hu, Tao +5 more
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Terahertz plasmonic composites
Physical Review E, 2007The dielectric response of a polymer matrix composite can be substantially modified and tuned within a broad frequency band by integrating within the material an artificial plasmon medium composed of periodically distributed, very thin, electrically conducting wires.
Syrus C, Nemat-Nasser +6 more
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Terahertz semiconductor-heterostructure lasers
Summaries of Papers Presented at the Lasers and Electro-Optics. CLEO '02. Technical Diges, 2002Semiconductor devices have become indispensable for generating electromagnetic radiation in everyday applications. Visible and infrared diode lasers are at the core of information technology, and at the other end of the spectrum, microwave and radio-frequency emitters enable wireless communications. But the terahertz region (1-10 THz; 1 THz = 10(12) Hz)
KOEHLER R. +8 more
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Optics Letters, 1999
In femtosecond terahertz-pulse (T-ray) imaging of metal structures with dimensions of the order of the wavelength, it is observed that the T rays propagate faster than the vacuum speed of light. In the case of apertures this can be understood as a waveguide effect in which superluminal velocities are expected close to the cutoff frequency. However, the
Wynne, K., Jaroszynski, D.A.
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In femtosecond terahertz-pulse (T-ray) imaging of metal structures with dimensions of the order of the wavelength, it is observed that the T rays propagate faster than the vacuum speed of light. In the case of apertures this can be understood as a waveguide effect in which superluminal velocities are expected close to the cutoff frequency. However, the
Wynne, K., Jaroszynski, D.A.
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International Journal of High Speed Electronics and Systems, 2009
Sensing applications of THz technology include applications for space exploration, detection of concealed objects, explosive identification, and THz cancer detection. This paper will review these and other emerging applications and existing and potential THz sources and detectors, including photonic and electronic THz devices, such as plasmonic field ...
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Sensing applications of THz technology include applications for space exploration, detection of concealed objects, explosive identification, and THz cancer detection. This paper will review these and other emerging applications and existing and potential THz sources and detectors, including photonic and electronic THz devices, such as plasmonic field ...
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2012 IEEE International Topical Meeting on Microwave Photonics, 2012
We present a novel concept for THz systems based on a photonic local oscillator. We propose that such systems will enable the creation of highly coherent, thus highly sensitive systems for frequencies ranging from 100 GHz to 5 THz. Coherent THz systems would widen the potential application range by reducing equipment cost and increasing sensitivity. To
Seeds AJ +10 more
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We present a novel concept for THz systems based on a photonic local oscillator. We propose that such systems will enable the creation of highly coherent, thus highly sensitive systems for frequencies ranging from 100 GHz to 5 THz. Coherent THz systems would widen the potential application range by reducing equipment cost and increasing sensitivity. To
Seeds AJ +10 more
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Terahertz ellipsometry and terahertz optical-Hall effect
Thin Solid Films, 2011Ellipsometry has been proven as an excellent tool for the precise and accurate determination of material optical properties in the spectral range from the far infrared to the vacuum ultraviolet. In the terahertz frequency domain, however, ellipsometry is still in its infancy.
T. Hofmann +5 more
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