Journal ArticleDOI
Comparison between pulsed terahertz time-domain imaging and continuous wave terahertz imaging
TLDR
In this paper, an evaluation of pulsed terahertz (THz) and continuous wave (CW) measurements for non-destructive testing applications was carried out for the detection of defects in space shuttle foam insulation.Abstract:
We report an evaluation of pulsed terahertz (THz) time-domain measurement and continuous wave (CW) terahertz measurement for non-destructive testing applications. The strengths and limitations of the modalities are explored via the example of the detection of defects in space shuttle foam insulation. It is decided that CW imaging allows for a more compact and simple system, while pulsed measurements yield a broader range of information.read more
Citations
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Journal ArticleDOI
Review of terahertz and subterahertz wireless communications
John F. Federici,Lothar Moeller +1 more
TL;DR: The goal of this paper is to provide a comprehensive review of wireless sub-THz and THz communications and report on the reported advantages and challenges of using sub-terahertz andTHz waves as a means to transmit data wirelessly.
Journal ArticleDOI
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.
Journal ArticleDOI
A single-pixel terahertz imaging system based on compressed sensing
Wai Lam Chan,Kriti Charan,Dharmpal Takhar,Kevin F. Kelly,Richard G. Baraniuk,Daniel M. Mittleman +5 more
TL;DR: In this paper, a terahertz imaging system that uses a single pixel detector in combination with a series of random masks to enable high-speed image acquisition is described, based on the theory of compressed sensing, which permits the reconstruction of a N-by-N pixel image using much fewer than N2 measurements.
Journal ArticleDOI
Terahertz imaging: applications and perspectives
Christian Jansen,Steffen Wietzke,Ole Peters,Maik Scheller,Nico Vieweg,Mohammed Salhi,N. Krumbholz,Christian Jördens,Thomas Hochrein,Martin Koch +9 more
TL;DR: Terahertz (THz) spectroscopy holds large potential in the field of nondestructive, contact-free testing as mentioned in this paper, and the ongoing advances in the development of THz systems, as well as the appearance of the first related commercial products, indicate that large-scale market introduction of THZ systems is rapidly approaching.
Journal ArticleDOI
Toward real-time terahertz imaging
TL;DR: This critical and comprehensive review of enabling hardware, instrumentation, algorithms, and potential applications in real-time high-resolution THz imaging can serve a diverse community of fundamental and applied scientists.
References
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Journal ArticleDOI
Imaging with terahertz waves
B. B. Hu,Martin C. Nuss +1 more
TL;DR: This work presents what is to their knowledge the first imaging system based on optoelectronic terahertz time-domain spectroscopy, and demonstrates applications to package inspection and chemical content mapping in biological objects.
Journal ArticleDOI
Picosecond photoconducting Hertzian dipoles
TL;DR: In this article, the generation transmission and detection of extremely rapid electromagnetic pulses have been achieved using fast photoconducting materials as time-varying Hertzian dipoles, which overcomes many of the limitations imposed by transmission line structures, and due to its jitter free behavior and open geometry is ideally suited for transient electromagnetic measurements of materials.
Journal ArticleDOI
Free‐space electro‐optic sampling of terahertz beams
Q. Wu,Xi-Cheng Zhang +1 more
TL;DR: In this article, free-space electro-optic sampling via the linear electro−optic effect (Pockels effect) offers a flat frequency response over an ultrawide bandwidth and the potential for simple cross-correlation signal of the terahertz and optical pulses.
Journal ArticleDOI
Recent advances in terahertz imaging
Daniel M. Mittleman,Maya R. Gupta,Ramesh Neelamani,Richard G. Baraniuk,J.V. Rudd,Martin Koch +5 more
TL;DR: The latest results in tomographic imaging, in which waveforms reflected from an object can be used to form a three-dimensional representation, are described and substantial improvements in the spatial resolution are demonstrated.
Journal ArticleDOI
High-power terahertz radiation from relativistic electrons
TL;DR: Calculations and measurements are reported that confirm the production of high-power broadband THz radiation from subpicosecond electron bunches in an accelerator, several orders of magnitude higher than any existing source, which could enable various new applications.