Terahertz wave imaging: horizons and hurdles.
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TLDR
The uniqueness and limitations of T-ray imaging are discussed, the major challenges impeding T-rays imaging are identified, and solutions and opportunities are proposed.Abstract:
Terahertz (THz) science will profoundly impact biotechnology It has tremendous potential for applications in imaging, medical diagnosis, health monitoring, environmental control and chemical and biological identification THz research will become one of the most promising research areas in the 21st century for transformational advances in imaging, as well as in other interdisciplinary fields However, terahertz wave (T-ray) imaging is still in its infancy This paper discusses the uniqueness and limitations of T-ray imaging, identifies the major challenges impeding T-ray imaging and proposes solutions and opportunities in this field It also concentrates on the generation, propagation and detection of T-rays by the use of femtosecond opticsread more
Citations
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Journal ArticleDOI
Terahertz magnetic response from artificial materials.
Ta-Jen Yen,Ta-Jen Yen,Ta-Jen Yen,Willie J. Padilla,Willie J. Padilla,Willie J. Padilla,Nicholas X. Fang,Nicholas X. Fang,Nicholas X. Fang,D. C. Vier,D. C. Vier,D. C. Vier,David R. Smith,David R. Smith,David R. Smith,John B. Pendry,John B. Pendry,John B. Pendry,Dmitri Basov,Dmitri Basov,Dmitri Basov,Xiang Zhang,Xiang Zhang,Xiang Zhang +23 more
TL;DR: It is shown that magnetic response at terahertz frequencies can be achieved in a planar structure composed of nonmagnetic conductive resonant elements and suggested that artificial magnetic structures, or hybrid structures that combine natural and artificial magnetic materials, can play a key role in teraHertz devices.
Journal ArticleDOI
A metamaterial absorber for the terahertz regime: Design, fabrication and characterization
Hu Tao,Nathan Ingle Landy,Christopher M. Bingham,Xin Zhang,Richard D. Averitt,Willie J. Padilla +5 more
TL;DR: A metamaterial that acts as a strongly resonant absorber at terahertz frequencies using a bilayer unit cell which allows for maximization of the absorption through independent tuning of the electrical permittivity and magnetic permeability is presented.
Journal ArticleDOI
A dual band terahertz metamaterial absorber
Hu Tao,Chris Bingham,D. Pilon,Kebin Fan,Andrew C. Strikwerda,David Shrekenhamer,Willie J. Padilla,Xin Zhang,Richard D. Averitt +8 more
TL;DR: In this article, a dual band metamaterial absorber with two distinct absorption peaks of 0.85 at 1.4 THz and 0.94 at 3.0 THz is presented.
Journal ArticleDOI
The potential of terahertz imaging for cancer diagnosis: A review of investigations to date
TL;DR: Investigations relating to the potential of terahertz imaging and spectroscopy for cancer diagnosis will be highlighted and a short review of recent advances is provided.
Journal ArticleDOI
Wideband terahertz spectroscopy of explosives
TL;DR: In this article, the authors report the absorption spectra over an extended frequency band from 0.5 to 6 THz for four explosives: RDX (1,3,5-trinitroperhydro-1, 3,5,7-tetrazocine), PETN (pentaerythritol tetranitrate), and TNT (2,4,6-tritrotoluene).
References
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Imaging with terahertz waves
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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.
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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.
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Intense terahertz pulses by four-wave rectification in air
D. J. Cook,Robin M. Hochstrasser +1 more
TL;DR: A new four-wave rectification method for the generation of intense, ultrafast terahertz pulses from gases that is sensitive to the relative phases of the fundamental and second-harmonic pulses.
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T-ray imaging
TL;DR: In this paper, the authors describe the technology necessary to perform terahertz "T-ray" imaging, novel imaging techniques, and commercial applications of T-ray imaging.
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.