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.

Dielectric spectra of Bi0.98Nd0.02FeO3.00 multiferroic thin films in the terahertz frequency range

2010 ◽  
Vol 52 (9) ◽  
pp. 1842-1849 ◽  
Author(s):  
G. A. Komandin ◽  
V. I. Torgashev ◽  
A. A. Volkov ◽  
O. E. Porodinkov ◽  
I. E. Spektor ◽  
...  
Keyword(s):  
Thin Films ◽  
Terahertz Frequency ◽  
Frequency Range ◽  
Terahertz Frequency Range ◽  
Dielectric Spectra

scholarly journals FEM Simulation of THz Detector Based on Sb and Bi88Sb12 Thermoelectric Thin Films

2020 ◽  
Vol 10 (6) ◽  
pp. 1929
Author(s):  
Anastasiia S. Tukmakova ◽  
Alexei V. Asach ◽  
Anna V. Novotelnova ◽  
Ivan L. Tkhorzhevskiy ◽  
Natallya S. Kablukova ◽  
...  
Keyword(s):  
Thin Films ◽  
Radiation Power ◽  
Radiation Detection ◽  
Fem Simulation ◽  
Thz Radiation ◽  
Frequency Range ◽  
Mica Substrate ◽  
Substrate Properties ◽  
Thz Detector ◽  
Thermoelectric Thin Films

A terahertz (THz) detector based on thermoelectric thin films was simulated using the finite elements method. The thermoelectric circuit consisted of S b and B i 88 S b 12 150-nm films on the mica substrate. S b , B i 88 S b 12 , and mica-substrate properties have been measured experimentally in the THz frequency range. The model of electromagnetic heating was used in order to estimate possible heating of S b - B i 88 S b 12 contact. THz radiation power varied from 1 μ W to 50 mW, and frequency varied in the range from 0.3 to 0.5 THz. The calculations showed a temperature difference of up to 1 K, voltage up to 0.1 mV, and responsivity of several mVW − 1 . The results show that thin S b and B i − S b thermoelectric films can be used for THz radiation detection at room temperatures.

scholarly journals A Monoclinic Semiorganic Molecular Crystal GUHP for Terahertz Photonics and Optoelectronics

2021 ◽  
Author(s):  
Anton Sinko ◽  
Peter Solyankin ◽  
Aleksey Kargovsky ◽  
Vera Manomenova ◽  
Elena Rudneva ◽  
...  
Keyword(s):  
Terahertz Radiation ◽  
Narrow Band ◽  
Nonlinear Susceptibility ◽  
Phase Matching ◽  
Terahertz Frequency ◽  
Frequency Range ◽  
Hydrogen Phosphate ◽  
Terahertz Frequency Range ◽  
Absorption Bands ◽  
Phonon Mechanism

Abstract In this paper we describe the properties of the crystal of guanylurea hydrogen phosphate (NH2)2CNHCO(NH2)H2PO3 (GUHP) and propose its application in terahertz photonics and optoelectronics. GUHP crystal has a wide window of transparency and a high optical threshold in the visible and IR spectral regions and narrow absorption bands in the terahertz frequency range. The possibility of application of the crystal under study for the conversion of femtosecond laser radiation from visible an IR to terahertz range was demonstrated. It was shown that dispersion properties of the crystal allow the generation of narrow band terahertz radiation, whose spectral properties are determined by conditions close to phase matching. The properties of the generated terahertz radiation under various temperatures suggest the possibility of phonon mechanism of enhancement for nonlinear susceptibility of the second order.

Electrodynamic properties of lead Zirconate-Titanate thin films in the terahertz frequency range

2014 ◽  
Vol 56 (11) ◽  
pp. 2206-2212 ◽  
Author(s):  
G. A. Komandin ◽  
O. E. Porodinkov ◽  
L. D. Iskhakova ◽  
I. E. Spektor ◽  
A. A. Volkov ◽  
...  
Keyword(s):  
Thin Films ◽  
Lead Zirconate Titanate ◽  
Lead Zirconate ◽  
Terahertz Frequency ◽  
Frequency Range ◽  
Terahertz Frequency Range ◽  
Zirconate Titanate

scholarly journals A monoclinic semiorganic molecular crystal GUHP for terahertz photonics and optoelectronics

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Anton Sinko ◽  
Peter Solyankin ◽  
Aleksey Kargovsky ◽  
Vera Manomenova ◽  
Elena Rudneva ◽  
...  
Keyword(s):  
Terahertz Radiation ◽  
Narrow Band ◽  
Spectral Characteristics ◽  
Nonlinear Susceptibility ◽  
Phase Matching ◽  
Terahertz Frequency ◽  
Frequency Range ◽  
Terahertz Frequency Range ◽  
Absorption Bands ◽  
Intermolecular Hydrogen Bonds

AbstractIn this paper we describe the properties of the crystal of guanylurea hydrogen phosphate (NH$$_2$$ 2 )$$_2$$ 2 CNHCO(NH$$_2$$ 2 )H$$_2$$ 2 PO$$_3$$ 3 (GUHP) and propose its application in terahertz photonics and optoelectronics. GUHP crystal has a wide window of transparency and a high optical threshold in the visible and NIR spectral regions and narrow absorption bands in the terahertz frequency range. The spectral characteristics of absorption and refraction in the THz range were found to be strongly dependent on crystal temperature and orientation. Computer simulations made it possible to link the nature of the resonant response of the medium at THz frequencies with the molecular structure of the crystal, in particular, with intermolecular hydrogen bonds and the layered structure of the lattice. The possibility of application of the crystal under study for the conversion of femtosecond laser radiation from visible an NIR to terahertz range was demonstrated. It was shown that dispersion properties of the crystal allow the generation of narrow band terahertz radiation, whose spectral properties are determined by conditions close to phase matching. The properties of the generated terahertz radiation under various temperatures suggest the possibility of phonon mechanism of enhancement for nonlinear susceptibility of the second order.

FORM BIREFRINGENT STRUCTURES MATCHING TO FREE SPACE IN THE TERAHERTZ FREQUENCY RANGE

2015 ◽  
Vol 74 (19) ◽  
pp. 1767-1776 ◽  
Author(s):  
V. I. Bezborodov ◽  
O.S. Kosiak ◽  
Ye. M. Kuleshov ◽  
V. V. Yachin
Keyword(s):  
Free Space ◽  
Terahertz Frequency ◽  
Frequency Range ◽  
Terahertz Frequency Range

HIGH FREQUENCY OHMIC LOSSES IN TERAHERTZ FREQUENCY RANGE CW KLYNOTRONS

2017 ◽  
Vol 76 (10) ◽  
pp. 929-940 ◽  
Author(s):  
Yu. S. Kovshov ◽  
S. S. Ponomarenko ◽  
S. A. Kishko ◽  
A. A. Likhachev ◽  
S. A. Vlasenko ◽  
...  
Keyword(s):  
High Frequency ◽  
Terahertz Frequency ◽  
Frequency Range ◽  
Terahertz Frequency Range ◽  
Ohmic Losses

Active modulation of refractive index by stress in the terahertz frequency range

2013 ◽  
Vol 52 (25) ◽  
pp. 6364 ◽  
Author(s):  
Lin’an Li ◽  
Wei Song ◽  
Zhiyong Wang ◽  
Shibin Wang ◽  
Mingxia He ◽  
...  
Keyword(s):  
Refractive Index ◽  
Terahertz Frequency ◽  
Frequency Range ◽  
Terahertz Frequency Range
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