Modified bow-tie antennas AlGaN/GaN FinFETs for sub-THz detection

Author(s):  
M. Dub ◽  
P. Sai ◽  
A. V. Chernyadiev ◽  
D. B. But ◽  
M. Sakowicz ◽  
...  
Keyword(s):  
2021 ◽  
Vol 129 (6) ◽  
pp. 741
Author(s):  
А.Э. Ячменев ◽  
Д.В. Лаврухин ◽  
Р.А. Хабибуллин ◽  
Ю.Г. Гончаров ◽  
И.Е. Спектор ◽  
...  

We report on the experimental study of the photoconductive antennas (PCAs) - detectors based on superlattice heterostructures (SLS) InGaAs/InAs/InAlAs with different types of elastic stresses in their functional layers. By using our laboratory time-domain THz spectrometer we measured and compared the detected THz signals, noise characteristics, and signal-to-noise ratios of the developed bow-tie PCA-detectors at different average probe power. We showed that the SLS-based PCA-detector with elastic stresses of both compression and tension in the layers demonstrates increased THz detection bandwidth compared to that for the SLS-based PCA-detector with only compression stresses in the SLS layers in the whole range of the optical probe power. We thus demonstrate that modification of the SLS via introduction of the elastic strain in the crystalline lattice of its layers could become an efficient approach to enhance the PCA-detectors performance leading to implementation of these PCAs to the spectroscopic THz setups.


2020 ◽  
Vol 20 (9) ◽  
pp. 800-811 ◽  
Author(s):  
Ferath Kherif ◽  
Sandrine Muller

In the past decades, neuroscientists and clinicians have collected a considerable amount of data and drastically increased our knowledge about the mapping of language in the brain. The emerging picture from the accumulated knowledge is that there are complex and combinatorial relationships between language functions and anatomical brain regions. Understanding the underlying principles of this complex mapping is of paramount importance for the identification of the brain signature of language and Neuro-Clinical signatures that explain language impairments and predict language recovery after stroke. We review recent attempts to addresses this question of language-brain mapping. We introduce the different concepts of mapping (from diffeomorphic one-to-one mapping to many-to-many mapping). We build those different forms of mapping to derive a theoretical framework where the current principles of brain architectures including redundancy, degeneracy, pluri-potentiality and bow-tie network are described.


2016 ◽  
Vol 5 (6) ◽  
pp. 158-162
Author(s):  
Kazuma Endo ◽  
Takayuki Sasamori ◽  
Teruo Tobana ◽  
Yoji Isota

Author(s):  
M. Dub ◽  
P. Sai ◽  
D. B. But ◽  
J. Jorudas ◽  
I. Kasalynas ◽  
...  
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