Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Peter Zolliker"'
Autor:
Dominik Bachmann, Rolf Brönnimann, Luis Nicklaus Caceres, Sofie L. Gnannt, Erwin Hack, Elena Mavrona, Daniel Sacré, Peter Zolliker
Publikováno v:
Applied Sciences, Vol 13, Iss 4, p 2747 (2023)
THz-Time domain spectroscopic imaging is demonstrated combining a robotic scanning method with continuous signal acquisition and holographic reconstruction of the object to improve the imaging resolution. We apply the method to a metallic Siemens sta
Externí odkaz:
https://doaj.org/article/e919b60c36d944c7814d3c3f2d74a2dc
Publikováno v:
Sensors, Vol 21, Iss 11, p 3757 (2021)
We present a real-time THz imaging method using a commercial fiber-coupled photo conductive antenna as the THz source and an uncooled microbolometer camera for detection. This new combination of state-of-the-art components is very adaptable due to it
Externí odkaz:
https://doaj.org/article/60300c2d64c54d6f9cef0aceaa3061ed
Autor:
Erwin Hack, Lorenzo Valzania, Gregory Gäumann, Mostafa Shalaby, Christoph P. Hauri, Peter Zolliker
Publikováno v:
Sensors, Vol 16, Iss 2, p 221 (2016)
In terahertz (THz) materials science, imaging by scanning prevails when low power THz sources are used. However, the application of array detectors operating with high power THz sources is increasingly reported. We compare the imaging properties of f
Externí odkaz:
https://doaj.org/article/0d537b99363d487a8b3413d14de9b588
Publikováno v:
Optics Express, 31 (10)
Light beams with Orbital Angular Momentum (OAM) are explored in applications from microscopy to quantum communication, while the Talbot effect revives in applications from atomic systems to x-ray phase contrast interferometry. We evidence the topolog
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bbc0c7344493364e4ab725a0c94e0a97
https://hdl.handle.net/20.500.11850/614375
https://hdl.handle.net/20.500.11850/614375
Autor:
Elena Mavrona, Yijie Hu, Sebastien Saitzek, Jean-Fancois Blach, Erwin Hack, Gustav Nystrom, Peter Zolliker
Publikováno v:
2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), IEEE, pp.1-2, 2022, ⟨10.1109/IRMMW-THz50927.2022.9895841⟩
The limited availability and environmental issues of materials resources call for the development of biodegradable devices, which also applies to THz devices. Here, we present our work developing THz wave-plates based on cellulose nanofibers and Ag n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::134dfaf8067335dd912c2dc930972a72
https://hal-univ-artois.archives-ouvertes.fr/hal-04094081
https://hal-univ-artois.archives-ouvertes.fr/hal-04094081
Publikováno v:
Optics letters. 47(7)
The Talbot effect has been revived in many fields of modern optics. As a key number of self-imaging, the fundamental Talbot length plays a crucial role in many applications. However, the inspection of the Talbot carpet for determining the Talbot leng
Autor:
Elena Mavrona, Yijie Hu, Gilberto De Freitas Siqueira, Markus Rüggeberg, Sergei Popov, Lars A. Berglund, Erwin Hack, Gustav Nyström, Peter Zolliker
Publikováno v:
Optical Materials Express. 13:92
Polarized THz time domain spectroscopy was used to study the anisotropic properties of wood-based materials for potential optical elements in the THz range, such as half-wave and quarter-wave plates. Wood samples of different species and sample thick
Autor:
Peter Zolliker, Elena Mavrona, Zhihui Zeng, Gustav Nyström, Daniel Sacre, Jingming Cao, Erwin Hack
Publikováno v:
2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz).
Cellulose-based materials have shown a variety of attractive properties in the past few years. Here, we characterized the THz properties of biomimetic aerogels based on cellulose nanofibers doped with various conductive materials, carbon nanotubes, s
Autor:
Luca A. E. Müller, Nico Kummer, Gustav Nyström, Elena Mavrona, Erwin Hack, Zhihui Zeng, Peter Zolliker, Daniel Sacre, Jingming Cao
Publikováno v:
ACS nano. 15(4)
Biomimetic, lamellar, and highly porous transition-metal carbide (MXene) embedded cellulose nanofiber (CNF) aerogels are assembled by a facile bidirectional freeze-drying approach. The biopolymer aerogels have large-scale, parallel-oriented micromete
Autor:
Arno Römmeler, Roman Furrer, Peter Zolliker, Bastian Lübke, Jörg Wermelinger, Jürg Neuenschwander, Jürg Dual, Urs Sennhauser, Antonio de Agostini
Publikováno v:
NDT & E International. 102:244-253
Ultrasonic, non-contact defect detection for polymer pipes can provide an easy and reliable method to establish on site quality control without destructive mechanical testing and finally may help to prevent damage from leaking pipes. The target is to