Room temperature generation of THz radiation in GaN quantum wells structures

2013 ◽  
Author(s):  
A. Penot ◽  
J. Torres ◽  
P. Nouvel ◽  
L. Varani ◽  
F. Teppe ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Room Temperature ◽  
Thz Radiation

scholarly journals Polarization of Magnetoplasmons in Grating Metamaterials Based on CdTe/CdMgTe Quantum Wells

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1811
Author(s):  
Dmitriy Yavorskiy ◽  
Maria Szoła ◽  
Krzysztof Karpierz ◽  
Rafał Rudniewski ◽  
Rafał Bożek ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Room Temperature ◽  
Thz Radiation ◽  
Small Contribution ◽  
Circularly Polarized ◽  
The Past ◽  
Radiation Transmission ◽  
Circular Component ◽  
Linearly Polarized ◽  
Linear Polarizer

Grating metamaterials were fabricated with electron beam lithography on CdTe/CdMgTe modulation doped structures with two non-interacting quantum wells. Two types of samples were studied: with etched gratings and with gratings formed by deposition of Au stripes. The polarization properties at THz frequencies of the gratings were determined at room temperature. It was shown that Au gratings formed a linear polarizer, while etched gratings did not polarize THz radiation. Transmission of circularly polarized THz radiation at low temperatures through a sample with no grating showed a strongly circularly polarized cyclotron resonance transition. Transmission of this radiation through a sample with an etched grating showed a magnetoplasmon transition that was almost perfectly linearly polarized. We concluded that magnetoplasmons in metamaterials with etched gratings are linearly polarized excitations, possibly with a small contribution of a circular component. This work opens the possibility of the detailed study of the polarization of magnetoplasmons, which has not been explored in the past.

scholarly journals Photothermal, Photoelectric, and Photothermoelectric Effects in Bi-Sb Thin Films in the Terahertz Frequency Range at Room Temperature

Photonics ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 76
Author(s):  
Mikhail K. Khodzitsky ◽  
Petr S. Demchenko ◽  
Dmitry V. Zykov ◽  
Anton D. Zaitsev ◽  
Elena S. Makarova ◽  
...  
Keyword(s):  
Thin Films ◽  
Terahertz Radiation ◽  
Room Temperature ◽  
Voltage Drop ◽  
Radiation Detection ◽  
Radiation Detectors ◽  
Thz Radiation ◽  
Terahertz Frequency ◽  
Frequency Range ◽  
Terahertz Frequency Range

The terahertz frequency range is promising for solving various practically important problems. However, for the terahertz technology development, there is still a problem with the lack of affordable and effective terahertz devices. One of the main tasks is to search for new materials with high sensitivity to terahertz radiation at room temperature. Bi1−xSbx thin films with various Sb concentrations seem to be suitable for such conditions. In this paper, the terahertz radiation influence onto the properties of thermoelectric Bi1−xSbx 200 nm films was investigated for the first time. The films were obtained by means of thermal evaporation in vacuum. They were affected by terahertz radiation at the frequency of 0.14 terahertz (THz) in the presence of thermal gradient, electric field or without these influences. The temporal dependencies of photoconductivity, temperature difference and voltage drop were measured. The obtained data demonstrate the possibility for practical use of Bi1−xSbx thin films for THz radiation detection. The results of our work promote the usage of these thermoelectric materials, as well as THz radiation detectors based on them, in various areas of modern THz photonics.

Low threshold, room temperature pulsed and quasi-continuous lasing in optically pumped CdZnTe/ZnTe quantum wells

1993 ◽  
Vol 22 (5) ◽  
pp. 479-484 ◽  
Author(s):  
R. D. Feldman ◽  
T. D. Harris ◽  
J. E. Zucker ◽  
D. Lee ◽  
R. F. Austin ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Room Temperature ◽  
Optically Pumped ◽  
Low Threshold

scholarly journals Carrier-density dependence of the photoluminescence lifetimes in ZnCdSe/ZnSSe quantum wells at room temperature

1999 ◽  
Vol 74 (22) ◽  
pp. 3359-3361 ◽  
Author(s):  
C. Jordan ◽  
J. F. Donegan ◽  
J. Hegarty ◽  
B. J. Roycroft ◽  
S. Taniguchi ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Density Dependence ◽  
Carrier Density ◽  
Room Temperature

scholarly journals THz technology for vision systems

2014 ◽  
Vol 27 (1) ◽  
pp. 129-136 ◽  
Author(s):  
J. Trontelj ◽  
A. Sesek ◽  
A. Svigelj
Keyword(s):  
Room Temperature ◽  
New Technology ◽  
Electrical Engineering ◽  
Thz Radiation ◽  
Vision Systems ◽  
Current Application ◽  
Operating Range ◽  
Imaging Results ◽  
System Solution ◽  
Thz Sensor

d.o.o, Sempeter pri Gorici, Slovenija KW nema KR nema The THz radiation brings new technology challenges and new opportunities to overcome some of the current application obstacles. In the paper a portable THz system is presented operating at room temperature. The presented solution is robust and inexpensive, convenient for many applications. The THz sensor fabricated at the Faculty of Electrical Engineering in the Laboratory for Microelectronics is currently one of the best sensors in its frequency operating range. It reaches sensitivity up to 1000V/W and NEP down to 5pW/?Hz in vacuum. With the proposed system solution variety of application can be covered. Some imaging results captured with the proposed system at different stand-off distances are shown in the paper.

Intrinsic photoinduced anomalous Hall effect in insulating GaAs/AlGaAs quantum wells at room temperature

2013 ◽  
Vol 102 (20) ◽  
pp. 202408 ◽  
Author(s):  
J. L. Yu ◽  
Y. H. Chen ◽  
Y. Liu ◽  
C. Y. Jiang ◽  
H. Ma ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Hall Effect ◽  
Room Temperature ◽  
Anomalous Hall Effect

scholarly journals Effective Manipulation of Spin Dynamics by Polarization Electric Field in InGaN/GaN Quantum Wells at Room Temperature

2020 ◽  
Vol 7 (13) ◽  
pp. 1903400
Author(s):  
Xingchen Liu ◽  
Ning Tang ◽  
Shixiong Zhang ◽  
Xiaoyue Zhang ◽  
Hongming Guan ◽  
...  
Keyword(s):  
Electric Field ◽  
Quantum Wells ◽  
Room Temperature ◽  
Spin Dynamics ◽  
Polarization Electric Field

THz radiation from coherent population changes in quantum wells

1994 ◽  
Vol 49 (7) ◽  
pp. 4668-4672 ◽  
Author(s):  
Paul C. M. Planken ◽  
Igal Brener ◽  
Martin C. Nuss ◽  
Marie S. C. Luo ◽  
Shun Lien Chuang ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Thz Radiation ◽  
Population Changes
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