Results 21 to 30 of about 2,627,966 (379)

Topological Insulator Films for Terahertz Photonics

Nanomaterials, 2022
We discuss experimental and theoretical studies of the generation of the third terahertz (THz) frequency harmonic in thin films of Bi2Se3 and Bi2-xSbxTe3-ySey (BSTS) topological insulators (TIs) and the generation of THz radiation in photoconductive ...
Kirill A. Kuznetsov, Sergey A. Tarasenko, Polina M. Kovaleva, Petr I. Kuznetsov, Denis V. Lavrukhin, Yury G. Goncharov, Alexander A. Ezhov, Dmitry S. Ponomarev, Galiya Kh. Kitaeva   +8 more
doaj   +1 more source

Polarization Sensitive Photodetectors Based on Two-Dimensional WSe₂

Nanomaterials, 2022
In this work we show the possibility of imparting polarization-sensitive properties to two-dimensional films of graphene-like semiconductors, using WSe2 as an example, by the application of ordered silver triangular nanoprisms.
Andrey Guskov, Sergey Lavrov, Rinat Galiev   +2 more
doaj   +1 more source

Ultra‐high‐frequency ultrasound and machine learning approaches for the differential diagnosis of melanocytic lesions

Experimental Dermatology, 2021
Malignant melanoma (MM) is one of the most dangerous skin cancers. The aim of this study was to present a potential new method for the differential diagnosis of MM from melanocytic naevi (MN).
F. Faita, T. Oranges, N. Di Lascio, F. Ciompi, S. Vitali, G. Aringhieri, A. Janowska, M. Romanelli, V. Dini   +8 more
semanticscholar   +1 more source

GaAs PHEMT PERFORMANCE INCREASE USING DELTA-DOPING IN THE FORM OF NANOWIRES OF TIN ATOMS

Российский технологический журнал, 2017
The PHEMT epitaxial structures with a doping profile in the form of tin nanowires were fabricated using vicinal GaAs substrate disoriented by 0.3° in relation to accurate orientation (100). Investigation of electron transport properties of the structures
A. E. Yachmenev, V. I. Ryzhii, P. P. Maltsev   +2 more
doaj   +1 more source

All-dielectric metalens based on a single colloidal particle for photoconductive optical-to-terahertz switches

Российский технологический журнал, 2020
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I. A. Glinskiy, N. V. Zenchenko, D. S. Ponomarev   +2 more
doaj   +1 more source

Ultra-high frequency gravitational waves from scattering, Bremsstrahlung and decay during reheating [PDF]

Journal of High Energy Physics
We investigate ultra-high frequency gravitational waves (GWs) from gravitons generated during inflationary reheating. Specifically, we study inflaton scattering with its decay product, where the couplings involved in this 2 → 2 scattering are the same as
Yong Xu
semanticscholar   +1 more source

Neural presbycusis at ultra-high frequency in aged common marmosets and rhesus monkeys

Aging, 2021
The aging of the population and environmental noise have contributed to high rates of presbycusis, also known as age-related hearing loss (ARHL). Because mice have a relatively short life span, murine models have not been suitable for determining the ...
Zhuoer Sun, Zhenzhe Cheng, Neng Gong, Zhen Xu, Chenxi Jin, Hao Wu, Yong Tao   +6 more
semanticscholar   +1 more source

MONOLITHIC INTEGRATED CIRCUIT OF GаN LOW-NOISE AMPLIFIER FOR 57-64 GHz BANDWIDTH

Российский технологический журнал, 2016
The article describes the development of a low-noise amplifier for the 57-64 GHz band based on a wide-gap semiconductor - gallium nitride. We analyze existing commercial developments in the area of low-noise amplifiers for the 60 GHz band, which are ...
D. V. Krapukhin, P. P. Maltsev
doaj   +1 more source

Design of a compact ultra-high frequency antenna for partial discharge detection in oil immersed power transformers

Ain Shams Engineering Journal, 2021
Oil-immersed Power transformers are considered to be one of the most essential parts of the electrical system and partial discharges (PD) are one of the dangerous problems that face transformer insulation.
Walid S. Salah, A. Gad, M. Attia, Soliman M. Eldebeikey, Abdelhady R. Salama   +4 more
semanticscholar   +1 more source

An Ultraminiaturized Dual-Stopband Frequency Selective Surface for Ultra High Frequency

IEEE Access, 2020
In this paper, an ultraminiaturized dual-stopband frequency selective surface (FSS) for ultra high frequency (UHF) is investigated. The proposed FSS uses one dielectric layer with two different metal layers printed on its surfaces and the metal layers ...
Lei Zhao, Xinhua Liang, Zhao-Min Chen, Yuan Li, Shengjun Zhang, Hongyu Ma, Xiaopeng Shen   +6 more
doaj   +1 more source