Results 61 to 70 of about 85,964 (311)

Polarization dynamics in spin‐VCSELs with integrated surface grating for high birefringence splitting

Electronics Letters, 2023
Polarization dynamics in spin‐polarized vertical‐cavity surface‐emitting lasers (spin‐VCSELs) with high birefringence have recently been demonstrated to offer very high potential for optical data‐transmission systems that outperform their counterparts ...
Markus Lindemann, Natalie Jung, Nicolas Manrique‐Nieto, Tobias Pusch, Rainer Michalzik, Nils C. Gerhardt, Martin R. Hofmann   +6 more
doaj   +1 more source

Measurements of the time-jitter of coherent terahertz synchrotron radiation with a superconducting detector [PDF]

, 2012
We have applied an ultrafast superconducting YBa2Cu3O7-δ (YBCO) detector to study the time jitter of the propagating electron bunches in a synchrotron. The jitter was determined from the coherent terahertz (THz) synchrotron radiation (CSR)
Hoehl, Arne, Pohl, Andreas, Ulm, Gerhard, Müller, Ralph, Feikes, Jörg, Hofherr, Matthias, Semenov, Alexej, Wüstefeld, Godehard, Hübers, Heinz-Wilhelm, Scheuring, Alexander, Probst, Petra, Ilin, Konstantin, Ries, Markus, Wünsch, Stefan   +13 more
core  

Power scaling of ultra-thin terahertz beam-splitters

, 2012
Extent: 2p.A low-cost ultra-thin broadband terahertz beam-splitter based on a thin conductive layer has previously been fabricated and tested. Here, this paper shows the linearity of power scaling of the beam-splitter from lower to higher power in ...
Ng, B., B. W.-H. Ng, B. M. Fischer, Lin, H., H. Lin, Fischer, B., Abbott, D., Ung, B., B. S.-Y. Ung, Fumeaux, C., C. Fumeaux, D. Abbott   +11 more
core   +1 more source

Spectrally resolved wave-mixing between near- and far-infrared pulses in gas [PDF]

, 2013
We investigate the nonlinear wave-mixing in gases between intense, short optical pulses and long-wavelength fields (mid infrared and terahertz). We show numerically that the beating between the sum- and difference-frequency generation components can be ...
Schmidt, Bruno E., Ozaki, T, Morandotti, R., M Clerici (16177538), Caspani, Lucia, M Shalaby (12138066), Shalaby, M., Vidal, Francois, Ozaki, Tsuneyuki, D Faccio (16177541), B Schmidt (9979535), Clerici, Matteo, Peccianti, M, F Vidal (6971162), Morandotti, Robert, T Ozaki (16177550), Yaakobi, O., Caspani, L, Peccianti, Marco, Schmidt, Bruno E, Shalaby, Mostafa, Marco Peccianti (4464661), Clerici, M, L Caspani (16177544), F Légaré (13690585), Légaré, François, Vidal, F., Morandotti, R, Yaakobi, Oded, O Yaakobi (16177547), Faccio, Daniele, Shalaby, M, Faccio, D, Schmidt, B E, Yaakobi, O, R Morandotti (16168658), Vidal, F, Légaré, F, M Clerici, L Caspani, Ozaki T, Schmidt BE, Morandotti R, R Morandotti, M Shalaby, Faccio D, Yaakobi O, Vidal F, Legare F, D Faccio, M Peccianti, F Légaré, O Yaakobi, Peccianti M, B E Schmidt, Caspani L, T Ozaki, Shalaby M, Clerici M, F Vidal   +59 more
core   +1 more source

Wood‐Derived Nanocellulose‐Biocarbon Fresnel‐Zone Plate Lenses for Sub‐THz Frequency Applications

Advanced Materials Technologies, EarlyView.
Wood‐derived nanocellulose and lignin‐based biocarbon were combined to fabricate fully bio‐based Fresnel zone plate (FZP) lenses for sub‐terahertz frequencies. These sustainable FZP lenses exhibit low dielectric loss and high directivity, achieving performance comparable to that of metallic references, and remain functional under environmental stress ...
Riikka Haataja, Mikko Kokkonen, Niina Halonen, Sami Myllymäki, Umair Rafique, Mandeep Singh, Ossi Laitinen, Heli Jantunen, Kristiina Oksman, Henrikki Liimatainen   +9 more
wiley   +1 more source

Dual Low-Rank Constrained Self-Representation Learning for Unsupervised SAR Image Change Detection

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Change detection (CD) in bitemporal synthetic aperture radar images has been an important research direction in remote sensing intelligent interpretation.
Weisong Li, Yinwei Li, Yiming Zhu
doaj   +1 more source

Terahertz Non-Destructive Testing and Imaging of High-Voltage Cables

Frontiers in Physics, 2022
The evaluation of the internal defects in high-voltage cross-linked polyethylene cables is highly crucial for the security and reliability of power transmission.
Zhang Zhenwei, Zhang Zhenwei, Xu Jing, Jia Rui, Wu Yinghong, Guan Hao, Han Siyi, Zhang Cunlin, Zhao Yuejin   +8 more
doaj   +1 more source

Unlocking Terahertz Steganography: Authentication of Hidden Images in Flexible Media

Advanced Materials Technologies, EarlyView.
Hidden information in multilayered devices, such as steganographic portraits, is detected and authenticated using reflection‐mode terahertz time‐domain imaging. Image reconstruction relies on a dedicated figure‐of‐merit obtained by integrating the signal intensity over the time‐window associated with the reflection from the metallic mirror backing the ...
Tiziana Ritacco, Francesca Vittorioso, Dimitrios C. Zografopoulos, Romeo Beccherelli, Walter Fuscaldo   +4 more
wiley   +1 more source

Terahertz magnetic plasmon waveguides

, 2012
Extent: 2p.A design of subwavelength terahertz waveguides is presented in this manuscript. The structure is composed of a linear chain of split-ring resonators (SRRs), i.e., artificial magnetic atoms. The energy transport along the chain can be described
Markus Walther, Abbott, D., Derek Abbott, Christophe Fumeaux, Walther, M., Kaltenecker, K., Liu, H., Fumeaux, C., Korbinian Kaltenecker, Hui Liu, Withawat Withayachumnankul, Withayachumnankul, W.   +11 more
core   +1 more source

A compact, continuous-wave terahertz source based on a quantum-cascade laser and a miniature cryocooler [PDF]

, 2010
We report on the development of a compact, easy-to-use terahertz radiation source, which combines a quantum cascade laser (QCL) operating at 3.1 THz with a compact, low input-power Stirling cooler.
Semenov, Alexey, Richter, Heiko, Schrottke, Lutz, Grahn, H. T., Giehler, M., Wienold, Martin, Huebers, H.-W., Pavlov, Sergey, Greiner-Bär, Michael, Hey, R., Semenov, Alexei D., A. D. Semenov, H. Richter, M. Greiner-Bär, M. Giehler, S. G. Pavlov, H.-W. Hübers, M. Wienold, L. Schrottke, H. T. Grahn, R. Hey   +20 more
core   +1 more source