scholarly journals Response of a Cold-Electron Bolometer on THz Radiation from a Long YBa2Cu3O7−δ Bicrystal Josephson Junction

2020 ◽  
Vol 10 (21) ◽  
pp. 7667
Author(s):  
Leonid Revin ◽  
Andrey Pankratov ◽  
Anna Gordeeva ◽  
Dmitry Masterov ◽  
Alexey Parafin ◽  
...  
Keyword(s):  
Josephson Junction ◽  
Traveling Wave ◽  
Multilayer Structure ◽  
Thz Radiation ◽  
Cold Electron ◽  
Dipole Antennas ◽  
Si Substrate ◽  
Wave Regime ◽  
Evaporation Technique ◽  
Shadow Evaporation

The response of the Cold-Electron Bolometers (CEBs), integrated into a 2-D array of dipole antennas, has been measured by irradiation from YBa2Cu3O7−δ (YBCO) 50 μm long Josephson junction into the THz region at frequencies from 0.1 to 0.8 THz. The possibility of controlling the amplitude-frequency characteristic is demonstrated by the external magnetic field in the traveling wave regime of a long Josephson junction. The YBCO junction has been formed on the bicrystal Zr1−xYxO2 (YSZ) substrate by magnetron sputtering and etching of the film. CEBs have been fabricated using an Al multilayer structure by a self-aligned shadow evaporation technique on Si substrate. Both receiver and oscillator have been located inside the same cryostat at 0.3 K and 2.7 K plates, respectively.

scholarly journals THz Properties of Long YBaCuO Bicrystal Josephson Junction Studied with a Cold-Electron Bolometer

2020 ◽  
Author(s):  
Andrey Pankratov ◽  
Leonid Revin ◽  
Anna Gordeeva ◽  
Dmytry Masterov ◽  
Alexey Parafin ◽  
...  
Keyword(s):  
Josephson Junction ◽  
Traveling Wave ◽  
Multilayer Structure ◽  
Cold Electron ◽  
Dipole Antennas ◽  
Si Substrate ◽  
Wave Regime ◽  
Amplitude Frequency Characteristic ◽  
Evaporation Technique ◽  
Shadow Evaporation

The response of the Cold-Electron Bolometers (CEBs), integrated into a 2-D array of dipole antennas, has been measured by irradiation from YBa$_2$Cu$_3$O$_{7-\delta}$ (YBCO) 50 $\mu$m long Josephson junction into the THz region at frequencies from 0.1 to 0.8 THz. The possibility of controlling the amplitude-frequency characteristic is demonstrated by the external magnetic field in the traveling wave regime of a long Josephson junction. YBCO junction has been formed on the bicrystal Zr$_{1-x}$Y$_x$O$_2$ (YSZ) substrate by magnetron sputtering and etching of the film. CEBs have been fabricated using an Al multilayer structure by a self-aligned shadow evaporation technique on Si substrate. Both receiver and oscillator have been located inside the same cryostat at 0.3K and 2.7K plates, respectively.

scholarly journals Spectral measurements of THz radiation emitted from intrinsic Josephson junction stacks

2018 ◽  
Vol 195 ◽  
pp. 05013
Author(s):  
V.P. Koshelets ◽  
N.V. Kinev ◽  
A.B. Ermakov ◽  
F. Rudau ◽  
R. Wieland ◽  
...  
Keyword(s):  
Josephson Junction ◽  
Thz Radiation ◽  
Spectral Measurements ◽  
Intrinsic Josephson Junction

Understanding the behavior of miniaturized metamaterial-based dipole antennas in leaky wave regime

2011 ◽  
Vol 106 (1) ◽  
pp. 145-149
Author(s):  
Luyang Zhou ◽  
Habiba Hafdallah Ouslimani ◽  
Alain Priou ◽  
Abdelwahab Ourir ◽  
Olivier Maas
Keyword(s):  
Dipole Antennas ◽  
Leaky Wave ◽  
Wave Regime

scholarly journals Simulation of Collective Excitations in Long Josephson Junction Stacks

2018 ◽  
Vol 173 ◽  
pp. 06011
Author(s):  
Ilhom Rahmonov ◽  
Yury Shukrinov ◽  
Pavlina Atanasova ◽  
Elena Zemlyanaya ◽  
Oksana Streltsova ◽  
...  
Keyword(s):  
Josephson Junction ◽  
Traveling Wave ◽  
Josephson Junctions ◽  
Collective Excitation ◽  
Radiation Power ◽  
Bias Current ◽  
Collective Excitations ◽  
Phase Dynamics

The phase dynamics of a stack of long Josephson junctions has been studied. Both inductive and capacitive couplings between Josephson junctions have been taken into account in the calculations. The IV-curve, the dependence on the bias current of the radiation power and dynamics of each JJs of the stack have been investigated. The coexistence of the charge traveling wave and fluxon states has been observed. This state can be considered as a new collective excitation in the system of coupled Josephson junctions. We demonstrate that the observed collective excitation leads to the decrease of radiation power from the system.

Epitaxial Growth of CoSi2/Si Hetero-Structure by Solid State Interaction of Co/Ti/Si Multilayer

1994 ◽  
Vol 337 ◽  
Author(s):  
Bing-zong Li ◽  
Wei-Jun Wu ◽  
Kai Shao ◽  
Zhi-Guang Gu ◽  
Guo-Bao Jiang ◽  
...  
Keyword(s):  
Solid State ◽  
Epitaxial Growth ◽  
Multilayer Structure ◽  
State Interaction ◽  
Si Substrate ◽  
Ternary Interaction ◽  
Hetero Structure ◽  
Diffusion Controlled ◽  
Annealing Procedure ◽  
Solid State Interaction

ABSTRACTA new method of epitaxial growth of CoSi2 film on Si substrate by ternary solid state interaction is investigated. XRD, RBS and TEM show that single-crystalline CoSi2 can be formed on both Si (111) and (100) substrates by using Co/Ti/Si or TiN/Co/Ti/Si multilayer. The evolution of multilayer structure and its resistivity is studied and epitaxy mechanism is discussed. Experimental results indicate strong affinity between Co and Si. During the ternary interaction the epitaxial CoSi2 can be grown directly on Si and its growth may behave as a diffusion controlled process. The thickness of Ti layer and the annealing procedure have important effect on CoSi2 epitaxial growth.

scholarly journals Antenna-Coupled Titanium Microbolometers: Application for Precise Control of Radiation Patterns in Terahertz Time-Domain Systems

Sensors ◽  
2021 ◽  
Vol 21 (10) ◽  
pp. 3510
Author(s):  
Liang Qi ◽  
Linas Minkevičius ◽  
Andrzej Urbanowicz ◽  
Andrej Švigelj ◽  
Ignas Grigelionis ◽  
...  
Keyword(s):  
Time Domain ◽  
Thz Radiation ◽  
Radiation Patterns ◽  
Dipole Antennas ◽  
Terahertz Time Domain Spectroscopy ◽  
Precise Control ◽  
Propagation Axis ◽  
Spatial Beam ◽  
Comprehensive Picture ◽  
And Control

An ability of lensless titanium-based antenna coupled microbolometers (Ti-μbolometers) operating at room temperature to monitor precisely radiation patterns in terahertz time-domain spectroscopy (THz-TDS) systems are demonstrated. To provide comprehensive picture, two different THz-TDS systems and Ti-μbolometers coupled with three different antennas—narrowband dipole antennas for 0.3 THz, 0.7 THz and a log-periodic antenna for wideband detection—were selected for experiments. Radiation patterns, spatial beam profiles and explicit beam evolution along the propagation axis are investigated; polarization-sensitive properties under various THz emitter power ranges are revealed. It was found that the studied Ti-μbolometers are convenient lensless sensors suitable to discriminate and control THz radiation pattern features in various wideband THz-TDS systems.

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