Journal ArticleDOI
A tunable universal terahertz filter using artificial dielectrics based on parallel-plate waveguides
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TLDR
In this article, a universal filter for terahertz (THz) frequency regime was demonstrated using parallel-plate waveguides (PPWGs) that mimic artificial dielectrics.Abstract:
Using parallel-plate waveguides (PPWGs) that mimic artificial dielectrics, we demonstrate a universal filter that provides low-pass, high-pass, band-pass, and band-stop (or notch) filtering functionalities in the terahertz (THz) frequency regime. The device essentially consists of two PPWGs in a complementary geometry. The filtering functionality is achieved by positioning an appropriate amplitude mask in the path of the spatially chirped THz beam between the two waveguides. By varying the position of the mask, we experimentally and theoretically demonstrate continuous tunability of the respective 3 dB cutoff frequencies within the frequency range from about 0.3 to 0.7 THz.read more
Citations
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Journal ArticleDOI
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.
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Perspective: Terahertz science and technology
TL;DR: In this Perspective article, a few important examples are discussed: the development of methods to access nonlinear optical effects in the terahertz range; methods to probe nanoscale phenomena; and, the growing likelihood that teraHertz technologies will be a critical player in future wireless networks.
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Terahertz Biochemical Molecule‐Specific Sensors
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Tunable Band-Stop Filters for Graphene Plasmons Based on Periodically Modulated Graphene.
TL;DR: Tunable band-stop filters based on graphene with periodically modulated chemical potentials are proposed, which are a good choice for compact on-chip applications and can be flexibly preset by adjusting the chemical potential ratio and the period number.
Journal ArticleDOI
Terahertz Vibrations and Hydrogen-Bonded Networks in Crystals
TL;DR: In this article, a review of the contribution of weak bonds in the construction of molecular crystals is presented, and the significant contribution of advanced computational codes in treating noncovalent interactions.
References
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Journal ArticleDOI
Short-Range Ultra-Broadband Terahertz Communications: Concepts and Perspectives
R. Piesiewicz,Thomas Kleine-Ostmann,N. Krumbholz,Daniel M. Mittleman,Martin Koch,Joerg Schoebel,Thomas Kurner +6 more
TL;DR: It is demonstrated that a directed NLOS path scheme will make a terahertz communication system robust to shadowing, and it is shown that dielectric mirrors covering only parts of the walls will significantly enhance the signal coverage in a typical indoor scenario.
Journal ArticleDOI
Undistorted guided-wave propagation of subpicosecond terahertz pulses.
TL;DR: 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.
Journal ArticleDOI
Gas sensing using terahertz time-domain spectroscopy
Daniel M. Mittleman,Rune Hylsberg Jacobsen,Ramesh Neelamani,Richard G. Baraniuk,Martin C. Nuss +4 more
TL;DR: A method for detection and identification of polar gases and gas mixtures based on the technique of tera- hertz time-domain spectroscopy is presented, and the utility of a wavelet-based signal analysis for tasks such as denoising is demonstrated.
Journal ArticleDOI
Comparison of the lowest-order transverse-electric (TE1) and transverse-magnetic (TEM) modes of the parallel-plate waveguide for terahertz pulse applications.
TL;DR: It is demonstrated that it is possible to overcome the undesirable effects caused by the TE(1) mode's inherent low-frequency cutoff, making it a viable THz wave-guiding option, and that for certain applications, theTE( 1) mode may even be more desirable than the TEM mode.
Journal ArticleDOI
Liquid-crystal-based terahertz tunable Lyot filter
TL;DR: In this article, a two-element Lyot filter operating in the terahertz (THz) frequency range is demonstrated, which can be continuously tuned from 0.388to 0.564THz using magnetically controlled birefringence in nematic liquid crystals.