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1.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Belyaev B. A., Tyurnev V. V., Voloshin A. S., Leksikov An. A., Galeev R. G., Shabanov V. F.
Заглавие
: A Bandpass Filter Based on
Dielectric
Layers with a Strip Conductor Subwavelength Grating at Their Interfaces
Место публикации
: Dokl. Phys. - 2020. - Vol. 65, Is. 9. - P.343-348. - ISSN 10283358 (ISSN),
DOI
10.1134/S1028335820090013
Примечания
: Cited References: 12. - This study was supported by the Ministry of Science and Higher Education of the Russian Federation, state assignment no. FEFE-2020-0013 “Development of the Theory of Self-Configurable Machine-Learning Algorithms for Simulating and Predicting Characteristics of Complex Systems”
Аннотация:
The design of a multilayer bandpass filter has been investigated, in which each of the half-wavelength resonators consists of two
dielectric
layers with outer strip conductor gratings in the form of square grids and inner ones in the form of square patches. The grids serve as mirrors with specified reflective properties, which ensure optimal couplings of the outer resonators with free space and optimal coupling between the resonators. The patch gratings make it possible to tune the resonator eigenfrequency during the filter synthesis. The efficiency of the quasi-static calculation of the frequency response for the layered structure is shown for the case of a lattice period smaller than the wavelength in the
dielectric
and much smaller than the layer thickness. Since the calculation does not require much computing power, the parametric synthesis of the device can be performed on a conventional personal computer. The measured characteristics of the prototype of the synthesized third-order filter with a fractional passband width of ∼10% and a central passband frequency of ∼10.6 GHz are in good agreement with the calculation. The proposed design allows one to fabricate multilayer panels radio transparent in a certain frequency band for hiding microwave antennas.
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2.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Belyaev B. A., Tyurnev V. V., Voloshin A. S., Leksikov An. A., Galeev R. G., Shabanov V. F.
Заглавие
: A Bandpass Filter–Polarizer Based on a
Dielectric
Multilayer with Strip Conductor Gratings
Место публикации
: Dokl. Phys. - 2020. - Vol. 65, Is. 7. - P.225-229. - ISSN 10283358 (ISSN),
DOI
10.1134/S1028335820050067
Примечания
: Cited References: 10. - This study was financially supported by the Ministry of Science and Higher Education of the Russian Federation in the implementation of the integrated project “Creation of a production of earth stations of advanced satellite communications systems to ensure the coherence of hard-to-reach, northern and Arctic territories of Russian Federation,” implemented with the participation of the Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences” (agreement number 075 -11-2019-078 dated 13.12.2019)
Аннотация:
A new design of a multilayer bandpass filter is proposed, in which each resonator consists of two identical
dielectric
layers with parallel strip conductor gratings on their outer surfaces and an orthogonal strip conductor grating between the layers. The filter designed on the basis of crossed gratings works simultaneously as a polarizer transparent in a specified frequency band if the electric field vector of a wave is parallel to the outer strip conductors but reflects waves with an orthogonal polarization. The data from a numerical electrodynamic analysis of a 3D model of the proposed device agree well with the results of the measurements performed on the fifth-order filter–polarizer prototype with a relative bandwidth of 14% and a central frequency of 13.4 GHz. The microwave power loss in the filter passband is ~1.2 dB under parallel polarization of the electromagnetic wave and more than 40 dB under orthogonal polarization.
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3.
Вид документа
: Статья из сборника (выпуск продолж. издания)
Шифр издания
:
Автор(ы)
: Mironov V. L., Kosolapova L. G., Lukin Y. I., Karavaysky A. Yu., Molostov I. P.
Заглавие
: A
dielectric
model at a frequency of 1.4GHz for frozen mineral soils in the temperature range −1 to −30°C
Коллективы
: Progress in Electromagnetics Research Symposium
Место публикации
: Progr. Electromag. Res. Symp. (PIERS): Proceedings. - 2016. - P.2518-2522. - ,
DOI
10.1109/PIERS.2016.7735031
Примечания
: References: 5. - The study was supported by a grant from the Russian Foundation for Basic Research (project No. 16-05-00572)
Аннотация:
A single-frequency
dielectric
model at 1.4 GHz for frozen mineral soils was developed, with the temperature and clay content varying from -1 to -30°C and 9.1 to 41.3%, respectively. The model is based on
dielectric
measurements of three typical soils (sandy loam, silt loam, and silty clay) collected in the Yamal peninsular. The refractive mixing model was applied to fit the data aggregates consisting of measured complex refractive indexes (CRI) for the three soils as a function of soil moisture at a fixed temperature. As a result, there were derived the parameters of the refractive mixing
dielectric
model as a function of temperature and texture. These parameters involve the maximum allowed gravimetric fraction of bound water and the CRIs of soil solids, bound soil water, and free soil water components, the latter being represented by capillary ice. The error of the
dielectric
model was evaluated by correlating the predicted complex relative permittivity (CRP) values of the soil samples with the measured ones. The coefficient of determination, R2, and the root mean square error, RMSE, were estimated to be R2 = 0.994, RMSE = 0.22 and R2 = 0.988, RMSE = 0.07 for the real and imaginary parts of the CRP, respectively. These values are on the order of the
dielectric
measurement error itself. The proposed
dielectric
model can be applied in active and passive remote sensing techniques used in the Arctic areas, mainly for the SMOS, SMAP and Aquarius missions.
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4.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Fomin S. V., Muzalevskiy K. V.
Заглавие
: A
dielectric
model for frozen mineral soils at a frequency of 435 MHz
Место публикации
: Remote Sens. Lett. - 2021. - Vol. 12, Is. 9. - P.944-950. - ISSN 2150704X (ISSN),
DOI
10.1080/2150704X.2021.1947537
Примечания
: Cited References: 16. - This work was supported by the state assignment of the Ministry of Science and Higher Education of the Russian Federation [project No. 0287-2021-0034]
Аннотация:
A single frequency refractive mixing
dielectric
model at 435 MHz for frozen mineral soils is proposed. The model was created based on the laboratory
dielectric
measurements of three soil samples in the ranges of soil moisture from 0.01cm3 cm−3 to 0.42cm3 cm−3, temperature from– 30°C to– 1°C, clay content (by weight) from 9.1% to 41.3%. Coefficient of determination R2 and root mean square error (RMSE) predicted by the model and measured values for real () and imaginary () part of the complex relative permittivity (CRP) are = 0.988 (= 0.323) and = 0.987 (= 0.100). Compared to well-known spectroscopic models, this model is simpler in practical engineering use. The input parameters of the model are the volumetric soil moisture, temperature and the content of the clay fraction. The output parameters are the real and imaginary parts of the CRP. The created model may be used to develop new remote sensing retrieval algorithms of temperature, the content of unfrozen water and ice in the root zone of frozen soils for northern regions.ε 'ε ''R2ε 'RMSEε 'R2ε ''RMSEε ''
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5.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Savin I. V., Muzalevskiy K. V., Mironov V. L.
Заглавие
: A
dielectric
model of thawed and frozen Arctic organic soils at 435 MHz
Коллективы
: SB RAS project [0287-2021-0034]
Место публикации
: Remote Sens. Lett. - 2022. - Vol. 13, Is. 5. - P.452-459. - ISSN 2150-704X,
DOI
10.1080/2150704X.2022.2041761. - ISSN 2150-7058(eISSN)
Примечания
: Cited References: 15. - This work was supported by the SB RAS project No. 0287-2021-0034
Предметные рубрики:
P-BAND RADAR
Аннотация:
A refractive-mixing
dielectric
model for frozen and thawed organic-rich soils at a frequency of 435 MHz was developed in this letter. The model was developed based on the
dielectric
measurements of five soil samples in which organic matter content was variated from 35% to 80% (by weight).
Dielectric
measurements were conducted in the range of volumetric soil moisture from ~2% to 60%, and the range of temperature from −30°C to 25°C. Coefficient of determination (R2) and root mean square error (RMSE) between predicted by the model and measured values for real (ε ') and imaginary (ε '') part of complex relative permittivity are R2ε '= 0.989 (RMSEε '=0.602) and R2ε ''= 0.906 (RMSEε ''=0.404), respectively. The developed
dielectric
model can be used for creating remote sensing algorithms (soil moisture retrieval in the root zone, active layer thickness and ice content measuring in permafrost area, etc.) in P-band.
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6.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Mironov V. L., Karavayskiy A. Yu., Lukin Y. I., Molostov I. P.
Заглавие
: A
dielectric
model of thawed and frozen Arctic soils considering frequency, temperature, texture and dry density
Место публикации
: Int. J. Remote Sens. - 2020. - Vol. 41, Is. 10. - P.3845-3865. - ISSN 0143-1161,
DOI
10.1080/01431161.2019.1708506. - ISSN 1366-5901 (eISSN)
Примечания
: Cited References: 39
Аннотация:
A
dielectric
model was developed for thawed and frozen mineral soils, based on the refractive mixing
dielectric
formula and the
dielectric
measurement data for three soils collected in the Arctic tundra of the Yamal Peninsula. The refractive mixing
dielectric
model was used in conjunction with the Debye multi relaxation equations as a theoretical model to fit the measured complex relative permittivity spectra as a function of soil moisture and temperature. As a result, the
dielectric
spectroscopic parameters for the various components of water in the soil, such as the low- and high-frequency limits of the complex relative permittivity, the times of the corresponding relaxations, and the specific conductivity, were simultaneously determined for soils with different clay contents for all measured temperatures. As the theoretical temperature dependences of these parameters, the Clausius–Mossotti, Eyring, and linear equations for the conductivity were used. By using approximations of the measured data with these formulas, the parameters of the temperature-dependent model were derived, such as the coefficient of volume expansion, energy and entropy of activation, and coefficient of thermal conductivity. A set of the parameters discussed above in conjunction with the refractive mixing formula is a temperature- and mineralogically dependent multi-relaxation spectroscopic
dielectric
model, which enables estimation of the permittivity of moist soils as a function of dry soil density, moisture, frequency, temperature, and texture. The statistical error of the proposed
dielectric
model was estimated in terms of the normalized root-mean-square error (nRMSE), which was equal to 5% and 25% for the
dielectric
constant and
dielectric
loss factor, respectively.
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7.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Belyaev B. A., Khodenkov S. A., Govorun I. V., Serzhantov A. M.
Заглавие
: A high-selectivity wideband bandpass dual-mode microstrip filter
Место публикации
: Dokl. Phys. - 2022. - Vol. 67, Is. 3. - P.89-93. - ISSN 10283358 (ISSN),
DOI
10.1134/S1028335822020021. - ISSN 15626903 (eISSN)
Примечания
: Cited References: 12. - This study was carried out within a State Assignment, project no. FEFE-2020-0013, of the Ministry of Science and Higher Education of the Russian Federation
Аннотация:
A half-wave microstrip resonator design with an irregular strip conductor short-circuited to the screen by its ends has been investigated. Based on the resonances of the first two oscillatory modes of this resonator, a miniaturized second-order filter with a fractional bandwidth from 40% to 90% has been implemented, which has a wide high-frequency stopband. A prototype of the designed eight-order filter based on four dual-mode resonators with a passband center frequency of 2 GHz and a fractional bandwidth of 40% has been fabricated on an alumina substrate 45.0 × 10.5 × 1.0 mm3 in size with a permittivity of ε = 9.8. The filter frequency response slopes are extremely steepness due to two attenuation poles located on the left and right sides of the passband. The experimental characteristics of the prototype are in good agreement with the data of the numerical electromagnetic simulation of the 3D model of the filter.
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8.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Belyaev B. A., Tyurnev V. V., Voloshin A. S., Galeev R. G.
Заглавие
: A microwave bandpass filter on
dielectric
layers with metal grids
Коллективы
: Ministry of Education and Science of the Russian Federation [14.575.21.0142, RFMEFI57517X0142]
Место публикации
: Tech. Phys. Lett. - 2018. - Vol. 44, Is. 5. - P.408-411. - ISSN 1063-7850,
DOI
10.1134/S1063785018050152. - ISSN 1090-6533(eISSN)
Примечания
: Cited References: 13. - This study was supported in part by the Ministry of Education and Science of the Russian Federation, project no. 14.575.21.0142 (unique project identifier code RFMEFI57517X0142).
Аннотация:
A bandpass filter of new design comprising
dielectric
layers with surface metal grids is developed and studied.
Dielectric
layers act as half-wave resonators, while metal grids act as mirrors with preset reflectivity and ensure optimum coupling between adjacent resonators and between the boundary resonators and free space. A test prototype of the third-order filter with a central bandpass frequency of ~12 GHz and relative bandwidth ~17% showed good agreement of theory and experiment. The proposed design can be used in making panels radio-transparent within a preset bandwidth for covering microwave antennas.
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9.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Mironov V. L., Lukin Y. I.
Заглавие
: A PHYSICAL MODEL OF
DIELECTRIC
SPECTRA OF THAWED AND FROZEN BENTONITIC CLAY WITHIN THE FREQUENCY RANGE FROM 1 TO 15 GHZ
Место публикации
: Russ. Phys. J.: SPRINGER, 2011. - Vol. 53, Is. 9. - P956-963. - ISSN 1064-8887,
DOI
10.1007/s11182-011-9516-4
Примечания
: Cited References: 7. - This study has been supported by the Complex integration project of the SB RAS Presidium, Grant No. 6 and a joint RFBR - France grant No. 09-05-91061-NTSNI.
Предметные рубрики:
SOIL
Ключевые слова
(''Своб.индексиров.''):
dielectric
spectra--moist specimens--bentonitic clay--microwaves--phase transitions--bentonitic clay--
dielectric
spectra--microwaves--moist specimens--phase transitions
Аннотация:
The
dielectric
spectra of moist specimens of bentonitic clay are measured within the frequency range from 1 to 15 GHz at positive and negative temperatures. The phase transitions in different types of water present in the clay specimen are investigated in the process of its freezing. The parameters of
dielectric
relaxation and conductivity of different water types in the specimen are determined. A thermal
dielectric
model for thawed and frozen bentonitic clay is developed.
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10.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Pichugin K. N., Sadreev A. F., Bulgakov E. N.
Заглавие
: A series of avoided crossings of resonances in the system of several different
dielectric
resonators results in giant Q-factors
Колич.характеристики
:15 с
Место публикации
: Photonics. - 2023. - Vol. 10, Is. 9. - Ст.973. - ISSN 23046732 (eISSN),
DOI
10.3390/photonics10090973
Примечания
: Cited References: 64. - This work is supported by the Russian Science Foundation under grant 22-12-00070
Аннотация:
On an example of a system of three/four/five/six different coupled coaxial silicon disks, we realize a series of avoided crossings of resonances (ACRs) with respect to the different morphologies for the different scales of each disk. Each next step of ACR accompanied by the optimization processes of all previous ACRs contributes almost one order of magnitude to the Q-factor. As a result, we achieve unprecedented values for the Q-factors: 6.6·104 for three, 4.8·106 for four, 8.5·107 for five and several billions for six free standing silicon disks. Comparisons to such prominent methods as whispering gallery modes or quasi bound states in the continuum to boost the Q-factor demonstrate the tremendous advantage of the present approach not only in terms of Q-factor values but also in terms of mode volumes. Multipole analysis of the final hybridized resonant mode explains such extremely large Q-factor values. The analysis shows a strong redistribution of radiation owing to the almost-exact destructive interference of the dominating complex multipole radiation amplitudes.
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11.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Belyaev B. A., Drokin N. A., Shabanov V. F., Shepov V. N.
Заглавие
: A study of the microwave
dielectric
permittivity of liquid crystals in electric and magnetic fields
Место публикации
: Tech. Phys. - 1998. - Vol. 43, Is. 1. - P.105-109. - ISSN 1063-7842,
DOI
10.1134/1.1258946
Примечания
: Cited References: 8
Аннотация:
A microwave detector based on a self-sustained oscillator circuit is proposed as a means to investigate the real and imaginary components of the
dielectric
permittivity of liquid crystals in external electric and magnetic fields. Results are given for measurements of a 500 MHz oscillator frequency for two types of nematic crystals, 5CBP and MBBA. Fundamental regularities are identified in the behavior of the microwave
dielectric
permittivity of samples in electric and magnetic fields. It is shown that the minimum of the high-frequency
dielectric
loss in liquid crystals correspond to a situation in which the long axes of the molecules are oriented parallel to the direction of the microwave electric field. (C) 1998 American Institute of Physics. [S1063-7842(98)02201-6].
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12.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Mironov V. L., Kerr Y. H., Kosolapova L. G., Savin I. V., Muzalevskiy K. V.
Заглавие
: A temperature-dependent
dielectric
model for thawed and frozen organic soil at 1.4 GHz
Коллективы
: Russian Science Foundation [14-17-00656]
Место публикации
: IEEE J. Sel. Top. Appl. Earth Observ. Remote Sens.: IEEE-Institute Electrical and Electronics Engineers, 2015. - Vol. 8, Is. 9. - P.4470-4477. - ISSN 1939-1404,
DOI
10.1109/JSTARS.2015.2442295. - ISSN 2151-1535
Примечания
: Cited References:19. - This work was supported in part by a grant from the Russian Science Foundation under Project 14-17-00656
Предметные рубрики:
moisture retrieval algorithm
active layer
validation
Ключевые слова
(''Своб.индексиров.''):
dielectric
constant--
dielectric
losses--
dielectric
measurement--l-band--modeling--soil moisture--soil properties
Аннотация:
A single-frequency
dielectric
model for thawed and frozen Arctic organic-rich (80%-90% organic matter) soil was developed. The model is based on soil
dielectric
data that were measured over the ranges of volumetric moisture from 0.007 to 0.573 cm3/cm3, dry soil density from 0.564 to 0.666 g/cm3, and temperature from 25°C to -30°C (cooling run), at the frequency of 1.4 GHz. The refractive mixing model was applied to fit the measurements of the soil's complex refractive index (CRI) as a function of soil moisture, with the values of temperature being fixed. Using the results of this fitting, the parameters of the refractive mixing model were derived as a function of temperature. These parameters involve the CRIs of soil solids as well as bound, transient, and free soil water components. The error of the
dielectric
model was evaluated by correlating the predicted complex relative permittivity (CRP) values of the soil samples with the measured ones. The coefficient of determination (R2) and the root-mean-square error (RMSE) were estimated to be R2 = 0.999, RMSE = 0.27 and R2 = 0.993, RMSE = 0.18 for the real and imaginary parts of the CRP, respectively. These values are in the order of the
dielectric
measurement error itself. The proposed
dielectric
model can be applied in active and passive remote-sensing techniques used in the areas with organicrich soil covers, mainly for the SMOS, SMAP, and Aquarius missions.
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13.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Epov M. I., Savin I. V., Mironov V. L.
Заглавие
: A temperature-dependent
dielectric
model for water- and oil-containing rocks in the frequency range from 0.5 to 15 GHz
Место публикации
: Russ. Geol. Geophys.: Elsevier Science BV, 2012. - Vol. 53, Is. 7. - P.698-703. - ISSN 1068-7971,
DOI
10.1016/j.rgg.2012.05.008
Примечания
: Cited References: 17
Предметные рубрики:
MOIST SOILS
POLARIZATION PROCESSES
PERMITTIVITY METHOD
Ключевые слова
(''Своб.индексиров.''):
dielectric
permittivity--effective conductivity--water-containing rocks--temperature-dependent
dielectric
model
Аннотация:
Dielectric
spectra of water-containing rocks forming a mineral framework of the oil-saturated bed (clay minerals amount to˂16%) were measured in the frequency range from 500 MHz to 15 GHz and in the temperature range from 20 to 80 °C. A physical model for computing spectra of the
dielectric
permittivity and effective conductivity of the studied rocks has been elaborated. Its input parameters are water (salt solution) content and temperature. The errors of the computed spectra relative to the measured ones are estimated.
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14.
Вид документа
: Статья из сборника (однотомник)
Шифр издания
:
Автор(ы)
: Mironov V. L., Savin I. V., Muzalevskiy K. V.
Заглавие
: A temperature-dependent multi-relaxation spectroscopic
dielectric
model for thawed and frozen organic soil at 0.05-15 Ghz
Коллективы
: Geoscience and Remote Sensing Symposium
Место публикации
: Geoscience and Remote Sensing Symposium (IGARSS), 2015 IEEE International. - 2015. - P.2031-2034. -
DOI
10.1109/IGARSS.2015.7326198
Аннотация:
The
dielectric
model for an arctic organic-rich soil collected on the Yamal peninsula (50% of organic matter) both thawed and frozen has been developed. The model is based on the soil
dielectric
measurements carried out in the ranges of gravimetric moisture 0.03 to 0.55 g/g, dry soil density 0.72 to 0.87 g/cm3, and temperature 25 to −30°C (cooling run), in the frequency range 0.05–15 GHz. To fit the results of measurements of the soil complex
dielectric
constant as a function of soil moisture and wave frequency, the refractive mixing
dielectric
model in conjunction with the Debye multi-relaxation equations were applied. As a result, the spectroscopic parameters of
dielectric
relaxations and electrical specific conductivities for the bound, transient bound, and unbound soil water components were derived, being further complimented with the thermodynamics parameters. Having these parameters, the complex
dielectric
constant of soil can be predicted as a function of 1) density of dry soil, 2) gravimetric moisture, 3) wave frequency, and 4) temperature1.
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15.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Mironov V. L., Savin I. V.
Заглавие
: A temperature-dependent multi-relaxation spectroscopic
dielectric
model for thawed and frozen organic soil at 0.05–15 GHz
Место публикации
: Phys. Chem. Earth: PERGAMON-ELSEVIER SCIENCE LTD, 2015. - Vol. 83–84: Emerging science and applications with microwave remote sensing data. - P.57-64. - ISSN 1474-7065,
DOI
10.1016/j.pce.2015.02.011
Примечания
: Cited References: 14. - The study was supported by the Russian Science Foundation (project 14-17-00656).
Предметные рубрики:
ARCTIC SOIL
BOREAL
Ключевые слова
(''Своб.индексиров.''): organic soil--moisture--temperature--
dielectric
model--thawed and frozen soil--smos
Аннотация:
A
dielectric
model for thawed and frozen Arctic organic-rich soil (50% organic matter) has been developed. The model is based on soil
dielectric
measurements that were collected over ranges of gravimetric moisture from 0.03 to 0.55 g/g, dry soil density from 0.72 to 0.87 g/cm3, and temperature from 25 to −30 °C (cooling run) in the frequency range of 0.05–15 GHz. The refractive mixing
dielectric
model was applied with the Debye multi-relaxation equations to fit the measurements of the soil’s complex
dielectric
constant as a function of soil moisture and wave frequency. The spectroscopic parameters of the
dielectric
relaxations for the bound, transient bound, and unbound soil water components were derived and were complimented by the thermodynamic parameters to obtain a complete set of parameters for the proposed temperature-dependent multi-relaxation spectroscopic
dielectric
model for moist soils. To calculate the complex
dielectric
constant of the soil, the following input variables must be assigned: (1) density of dry soil, (2) gravimetric moisture, (3) wave frequency, and (4) temperature. The error of the
dielectric
model was evaluated and yielded RMSEε′ values of 0.348 and 0.188 for the soil
dielectric
constant and the loss factor, respectively. These values are on the order of the
dielectric
measurement error itself. The proposed
dielectric
model can be applied in active and passive microwave remote sensing techniques to develop algorithms for retrieving the soil moisture and the freeze/thaw state of organic-rich topsoil in the Arctic regions.
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16.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: ZEIN N. E., ZINENKO V. I., FEDOROV A. S.
Заглавие
: ABINITIO CALCULATIONS OF PHONON FREQUENCIES AND
DIELECTRIC
-CONSTANTS IN A(4)B(6) COMPOUNDS
Место публикации
: Phys. Lett. A: ELSEVIER SCIENCE BV, 1992. - Vol. 164, Is. 1. - P115-119. - ISSN 0375-9601,
DOI
10.1016/0375-9601(92)90916-A
Примечания
: Cited References: 20
Предметные рубрики:
IV-VI COMPOUNDS
CRYSTAL-STRUCTURE
Аннотация:
The transverse and longitudinal optical frequencies at q = 0, the
dielectric
constant and the effective charges are calculated for the A4B6 type family of the semiconducting compounds GeTe, SnTe and PdTe. The calculations are performed in the framework of the density functional method with the use of the norm-conserving "first-principles" pseudopotentials. The estimated ferroelectric phase transition temperatures and a number of other calculated quantities turned out to be in good agreement with the experimental data. The variations of the electronic structure in the row PbTe-GeTe, which promote the ferroelectric phase transition for GeTe, are discussed.
WOS
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17.
Вид документа
: Статья из сборника (однотомник)
Шифр издания
:
Автор(ы)
: Ershov A. A., Oreshonkov A. S., Shestakov N. P., Aleksandrovsky A. S., Vtyurin A. N.
Заглавие
: Absorption spectra of PrF3 crystal
Коллективы
: Russia-China workshop on
dielectric
and ferroelectric materials, Российская академия наук, Воронежский государственный технический университет
Место публикации
: The Second Rus.-China Workshop on Dielectic and Ferroel. Mater.: program. - 2015. - Ст.P6.3. - P.82: abstract book
Материалы конференции
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18.
Вид документа
: Статья из сборника (выпуск продолж. издания)
Шифр издания
:
Автор(ы)
: Sidorenko M. S., Sergaeva O. N., Sadrieva Z. F., Roques-Carmes C., Muraev P. S., Maksimov D. N., Bogdanov A. A.
Заглавие
: Accidental bound state in the continuum in a chain of
dielectric
disks
Коллективы
: European Quantum Electronics Conference
Место публикации
: European Quantum Electronics Conference 2021 (21- 25 June 2021). Optics InfoBase Conference Papers. - 2021. - 2021 European Quantum Electronics Conference, EQEC 2021 - Part of 2021 Conference on Lasers and Electro-Optics Europe, CLEO 2021 (21 June 2021 through 25 June 2021, Virtual, Online) Conference code: 174130. - Ст.jsi_2_4
Примечания
: Cited References: 2. - The work was supported by RFBR (19-02-00419), the grant of the President of the Russian Federation (MK-2224.2020.2) and the Foundation for the Advancement of Theoretical Physics and Mathematics BASIS
Аннотация:
We experimentally analyze for the first time an off-Gamma BIC in a one-dimensional periodic chain of disks and demonstrate its transformation to a resonant state with the decrease of the chains length.
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19.
Вид документа
: Статья из сборника (однотомник)
Шифр издания
:
Автор(ы)
: Sidorenko M. S., Sergaeva O. N., Sadrieva Z. F., Roques-Carmes C., Muraev P. S., Maksimov D. N., Bogdanov A. A.
Заглавие
: Accidental bound state in the continuum in a chain of
dielectric
disks
Коллективы
: Conference on Lasers and Electro-Optics Europe; European Quantum Electronics Conference , RFBRRussian Foundation for Basic Research (RFBR) [19-02-00419]; Russian FederationRussian Federation [MK2224.2020.2]; Foundation for the Advancement of Theoretical Physics and Mathematics BASIS
Место публикации
: 2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference: IEEE, 2021. - Conference on Lasers and Electro-Optics Europe / European Quantum Electronics Conference (Jun 21-25, 2021, Electr. Network). - ISBN 978-1-6654-1876-8,
DOI
10.1109/CLEO/Europe-EQEC52157.2021.9592618
Примечания
: Cited References: 2. - The work was supported by RFBR (19-02-00419), the grant of the President of the Russian Federation (MK2224.2020.2) and the Foundation for the Advancement of Theoretical Physics and Mathematics BASIS
Аннотация:
Dielectric
resonators are open systems whose eigenmodes couple to the radiation continuum resulting in nonzero radiation losses. For a long time, it was believed that only guided modes with frequencies below the light line were decoupled from the radiation continuum [1] . In the early 2000’s, several counterexamples of perfectly localized states – i.e. totally decoupled from the radiation continuum – at frequencies above the light line were proposed in
dielectric
gratings and photonic crystal waveguides [2] . Such states are known as bound states in the continuum (BIC).
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20.
Вид документа
: Статья из сборника (однотомник)
Шифр издания
:
Автор(ы)
: Krasnov A. I., Pankin P. S., Buzin D. S., Romanenko G. A., Sutormin V. S., Nabol S. V., Zelenov F. V., Masyugin A. N., Ветров, Степан Яковлевич, Timofeev I. V.
Заглавие
: All-
dielectric
photonic crystal microcavity with electrically tunable Q-factor
Коллективы
: International School and Conference on optoelectronics, photonics, engineering and nanostructures, Высшая школа экономики, НИУ, Санкт-Петербургский национальный исследовательский Академический университет имени Ж.И. Алфёрова Российской академии наук
Место публикации
: 9th International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures: book of abstracts. - Saint-Petersburg, 2022
Примечания
: Cited References: 3
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