Journal ArticleDOI
Terahertz lenses made by compression molding of micropowders
Reads0
Chats0
TLDR
A simple and versatile approach for fabricating terahertz lenses based on compression molding of micropowder polymer materials in a tabletop hydraulic press, confirming the excellent imaging qualities of the compression molded lenses.Abstract:
We present a simple and versatile approach for fabricating terahertz lenses based on compression molding of micropowder polymer materials in a tabletop hydraulic press. To demonstrate the feasibility of this approach, a biconvex lens shape is calculated using a ray-tracing algorithm and lenses based on two different micropowders are fabricated. As the powder materials have different refractive indices, the resulting lenses share the same geometric shape but differ in their respective focal length. The focusing properties of the lenses are evaluated by transversal and sagittal beam profile measurements in a fiber-coupled terahertz time-domain spectroscopy system, confirming the excellent imaging qualities of the compression molded lenses.read more
Citations
More filters
Journal ArticleDOI
The 2017 terahertz science and technology roadmap
Sukhdeep Dhillon,Miriam S. Vitiello,Edmund H. Linfield,Alexander Giles Davies,Matthias C. Hoffmann,John H. Booske,Claudio Paoloni,Michael Gensch,Peter Weightman,Gwyn P. Williams,Enrique Castro-Camus,David R. S. Cumming,F. Simoens,Ivonne Escorcia-Carranza,James Grant,Stepan Lucyszyn,Makoto Kuwata-Gonokami,Kuniaki Konishi,Martin Koch,Charles A. Schmuttenmaer,Tyler L. Cocker,Rupert Huber,Andrea Markelz,Z. D. Taylor,Vincent P. Wallace,J. Axel Zeitler,Juraj Sibik,Timothy M. Korter,Brian N. Ellison,Suzanne Rea,Paul F. Goldsmith,Ken B. Cooper,Roger Appleby,D. Pardo,Peter G. Huggard,Viktor Krozer,Haymen Shams,Martyn J. Fice,Cyril C. Renaud,Alwyn J. Seeds,Andreas Stohr,Mira Naftaly,Nick M. Ridler,Roland Clarke,John Cunningham,Michael B. Johnston +45 more
TL;DR: The 2017 roadmap of terahertz frequency electromagnetic radiation (100 GHz-30 THz) as discussed by the authors provides a snapshot of the present state of THz science and technology in 2017, and provides an opinion on the challenges and opportunities that the future holds.
The 2016 terahertz science and technology roadmap
S. S. Dhillon,Vitiello,Edmund H. Linfield,A. G. Davies,Matthias C. Hoffmann,John H. Booske,Claudio Paoloni,M. Gench,Peter Weightman,Gwyn P. Williams,Enrique Castro-Camus,David R. S. Cumming,F. Simoens,I. Escorcia Carranza,John Grant,Stepan Lucyszyn,Makoto Kuwata-Gonokam,Kuniaki Konishi,Martin Koch,Charles A. Schmuttenmaer,Tyler L. Cocker,Rupert Huber,Andrea Markelz,Z. D. Taylor,Vincent P. Wallace,J. Axel Zeitler,Juraj Sibik,Timothy M. Korter,Brian N. Ellison,Suzanne Rea,Paul F. Goldsmith,Ken B. Cooper,Roger Appleby,D. Pardo,Peter G. Huggard,Krozer,Haymen Shams,Martyn J. Fice,Cyril C. Renaud,Alwyn J. Seeds,Andreas Stohr,Mira Naftaly,Nick M. Ridler,Roland Clarke,John Cunningham,Michael B. Johnston +45 more
TL;DR: The 2017 roadmap of terahertz frequency electromagnetic radiation (100 GHz-30 THz) as mentioned in this paper provides a snapshot of the present state of THz science and technology in 2017, and provides an opinion on the challenges and opportunities that the future holds.
Journal ArticleDOI
A review of terahertz sources
TL;DR: In this paper, an overview of the range of available terahertz sources, emphasizing recent developments, is given, and the focus then narrows to the sources that rely on surface phenomena.
Journal ArticleDOI
Terahertz spectroscopy on polymers: A review of morphological studies
S. Wietzke,Christian Jansen,Marco Reuter,T. Jung,Dietmar Kraft,Sangam Chatterjee,Bernd M. Fischer,Martin Koch +7 more
TL;DR: In this paper, the dielectric parameters refraction index n and absorption coefficient κ of various polymers determined by THz time-domain spectroscopy with a very high precision are reported.
Journal ArticleDOI
Optical Properties of 3D Printable Plastics in the THz Regime and their Application for 3D Printed THz Optics
TL;DR: In this paper, the terahertz properties of several materials which can be used for fused material deposition 3D printing are characterized and Polystyrene is identified as a material which shows a promising compromise between printability and THz transparency.
References
More filters
Journal ArticleDOI
Far-infrared time-domain spectroscopy with terahertz beams of dielectrics and semiconductors
TL;DR: In this paper, the authors measured the far-infrared absorption and dispersion from 0.2 to 2 THz of the crystalline dielectrics sapphire and quartz, fused silica, and the semiconductors silicon, gallium arsenide, and germanium.
Journal ArticleDOI
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.
Journal ArticleDOI
Non-destructive terahertz imaging of illicit drugs using spectral fingerprints.
TL;DR: A novel basic technology for terahertz imaging is developed, which allows detection and identification of drugs concealed in envelopes, by introducing the component spatial pattern analysis.
Journal ArticleDOI
Generation and detection of terahertz pulses from biased semiconductor antennas
TL;DR: In this article, a simple model based on the Drude-Lorentz theory of carrier transport was proposed to account for the details of the ultrashort terahertz pulses radiated from small photoconductive semiconductor antennas.
Journal Article
Terahertz dielectric properties of polymers
TL;DR: In this paper, the terahertz absorption spectra, the refractive indices and the dielectric functions of various polymer materials were measured and compared, and the loss mechanism was discussed by correlating the absorption coefficients and loss tangents (tan {delta}) of the materials.