Journal ArticleDOI
Undistorted guided-wave propagation of subpicosecond terahertz pulses.
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TLDR
Efficient quasi-optic coupling of a freely propagating beam of terahertz pulses into a parallel-plate copper waveguide and subsequent low-loss, single-TEM-mode propagation with virtually no group-velocity dispersion is reported.Abstract:
We report efficient quasi-optic coupling of a freely propagating beam of terahertz (THz) pulses into a parallel-plate copper waveguide (with a plate separation of 108mum) and subsequent low-loss, single-TEM-mode propagation with virtually no group-velocity dispersion. Undistorted, low-loss propagation of the incoming 0.3-ps FWHM THz pulses was observed within the bandwidth from 0.1 to 4 THz for a length of 24.4 mm. We compare experimentally derived values for the absorption and phase velocity with theory to show consistency. This demonstration is direct proof of the excellent performance of the parallel-plate waveguide as a wideband THz interconnect.read more
Citations
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Terahertz spectroscopy and imaging – Modern techniques and applications
TL;DR: The terahertz time-domain spectroscopy (THz-TDS) as discussed by the authors is a new spectroscopic technique based on coherent and time-resolved detection of the electric field of ultrashort radiation bursts.
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Metal wires for terahertz wave guiding
Kanglin Wang,Daniel M. Mittleman +1 more
TL;DR: It is shown how a simple waveguide, namely a bare metal wire, can be used to transport terahertz pulses with virtually no dispersion, low attenuation, and with remarkable structural simplicity.
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Imaging with terahertz radiation
TL;DR: A comprehensive review of the various techniques used for terahertz image formation can be found in this paper, as well as numerous examples which illustrate the many exciting potential uses for these emerging technologies.
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Terahertz integrated electronic and hybrid electronic–photonic systems
TL;DR: This Review Article examines the development of terahertz integrated electronic and hybrid electronic–photonic systems, considering, in particular, advances that deliver important functionalities for applications in communication, sensing and imaging.
Journal ArticleDOI
Bendable, low-loss Topas fibers for the terahertz frequency range
Kristian Nielsen,Henrik Koblitz Rasmussen,Aurèle J. L. Adam,Paul C. M. Planken,Ole Bang,Peter Uhd Jepsen +5 more
TL;DR: Near-field, frequency-resolved characterization with high spatial resolution of the amplitude and phase of the modal structure proves that the fiber is single-moded over a wide frequency range, and the authors see the onset of higher-order modes at high frequencies as well as indication of microporous guiding at low frequencies and high porosity of the fiber.
References
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Journal ArticleDOI
Kramers–Kronig relationship between ultrasonic attenuation and phase velocity
TL;DR: In this paper, Kramers-Kronig relations linking attenuation and dispersion are presented for a linear acoustic system and approximate, nearly local expressions relating the ultrasonic attenuation at a specific frequency to the local frequency derivative of the phase velocity are derived.
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Plastic ribbon THz waveguides
TL;DR: In this article, a single-mode, guided wave propagation in plastic ribbons was studied. But the authors focused on a single TM0 waveguide with a controllable group velocity dispersion, and they used cylindrical THz optics to obtain excellent quasioptic coupling between freely propagating THz waves and a single waveguide mode.
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Single-mode waveguide propagation and reshaping of sub-ps terahertz pulses in sapphire fibers
TL;DR: In this paper, a single-crystal sapphire fiber with sub-ps terahertz (THz) pulses was used to demonstrate the dominance of the single HE11 mode, despite the fiber dimensions allowing for multimode propagation.
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Propagation of ultrawideband short pulses of terahertz radiation through submillimeter-diameter circular waveguides
TL;DR: Experimental investigations in which quasi-optical methods were used to efficiently couple freely propagating, optoelectronically generated, subpicosecond pulses of terahertz radiation into submillimeter circular metal tubes (waveguides) and, consequently, to measure the transmitted pulses from these waveguides.
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Optoelectronic characterization of transmission lines and waveguides by terahertz time-domain spectroscopy
TL;DR: In this paper, an overview of an experimental search for an ultrawide-band transmission channel with low dispersion and loss is presented, together with phase-coherent Cherenkov radiation in the form of an electromagnetic shock wave from these propagating electrical pulses.