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Terahertz reflectarrays and nonuniform metasurfaces
15/01/2017

Terahertz reflectarrays and nonuniform metasurfaces

Daniel Headland, Tiaoming Niu, Eduardo Carrasco, Derek Abbott, Sharath Sriram, Madhu Bhaskaran, Christophe Fumeaux, and Withawat Withayachumnankul, IEEE J. Sel. Topics Quantum Electron., online 20 December 2016, DOI: 10.1109/JSTQE.2016.2640452 

A recent publication on terahertz reflectarray antennas provides a broad, critical perspective on the topic, and contrasts different approaches. The reflectarray antenna is a well-established device that offers significant control and freedom over the directionality and characteristics of its radiation pattern. Such a capability is critical to the successful development of commercially-viable terahertz technologies. In the paper, the design, fabrication, and experimental characterization of four terahertz reflectarray devices, based on two classes of terahertz resonator, is presented: the metallic resonator class and the dielectric resonator class. The devices presented can be adapted to produce terahertz antennas with diverse characteristics, including high antenna gain, polarization sensitivity, and customizable radiation patterns. Based on these results, it is hoped that, with future advances in terahertz resonator technology, reflectarray antennas will prove instrumental in facilitating numerous promising applications of the terahertz range, including high-volume communications, noninvasive medical imaging, and security screening.

The scientific and technical impact of the study can be summarized as:

  • Metallic resonators generally offer more choice and control over polarization-sensitive functionality, while dielectric resonators offer far greater efficiency.
  • These reflectarray device designs can be manipulated to fabricate terahertz antennas with customizable radiation patterns and that exhibit high antenna gain and polarization sensitivity.
  • Advances in terahertz resonator technology, for example dynamic steerability, could enable the commercial viability of applications such as short-range terahertz communications.
PUBLICATIONS

31/10/2016

Contact
nk@itis.ethz.ch

 

From Image-Based Modeling to the Modeling of Imaging with the Virtual Population

Esra Neufeld, Bryn Lloyd, and Niels Kuster, in Simulation and Synthesis in Medical Imaging, Proceedings of the First International Workshop, SASHIMI 2016, Held in Conjunction with MICCAI 2016, Athens, Greece, October 21, 2016, Volume 9968 of the series Lecture Notes in Computer Science, pp. 45–54, online October, 2016

 
PUBLICATIONS

14/10/2016

Contact
nk@itis.ethz.ch

 

Signaling by sulfur-containing molecules. Quantitative aspects.

Willem H. Koppenol and Patricia L. Bounds, Archives of Biochemistry and Biophysics, online September 23, 2016

 
PUBLICATIONS

12/10/2016

Contact
nk@itis.ethz.ch

 

Magnetic Nanoparticle-Induced Hyperthermia with Appropriate Payloads: Paul Ehrlich’s “Magic (Nano)bullet” for Cancer Theranostics?

Nilroy R. Datta, Sunil Krishnan, Daniel E. Speiser, Esra Neufeld, Niels Kuster, Stefan Bodis, and Heinrich Hofmann,
Cancer Treatment Reviews, Volume 50, pp. 217–227, online September 2016

 
PUBLICATIONS

10/10/2016

Contact
nk@itis.ethz.ch

 

Approach to Validate Simulation-Based Distribution Predictions Combining the Gamma-Method and Uncertainty Assessment: Application to Focused Ultrasound

Esra Neufeld, Adamos Kyriacou, Wolfgang Kainz, and Niels Kuster, Journal of Verification, Validation and Uncertainty Quantification, Volume 1, Issue 3, 031006, online September 2016

 
PUBLICATIONS

23/09/2016

Contact
nk@itis.ethz.ch

 

Virtual Population-Based Assessment of the Impact of 3 Tesla Radiofrequency Shimming and Thermoregulation on Safety and B1+ Uniformity

Manuel Murbach, Esra Neufeld, Eugenia Cabot, Earl Zastrow, Juan Córcoles, Wolfgang Kainz, and Niels Kuster, Magnetic Resonance in Medicine, Volume 76, Issue 3, pp. 986–997, September 2016; Early View, September 2015, online September 24, 2015

 
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