Ukrainian Journal of Physical Optics最新文献_第10页

Analysis of multiband graphene-based terahertz square-ring fractal antenna 多波段石墨烯基太赫兹方环分形天线分析

IF 3.9 4区物理与天体物理

Ukrainian Journal of Physical Optics Pub Date : 2020-01-01 DOI: 10.3116/16091833/21/2/93/2020

Zinelabiddine Mezache

引用次数: 5

Reconstruction of spatial distribution of strains in crystals using the energy spectrum of X-ray Moire patterns 利用x射线云纹图能谱重建晶体中应变的空间分布

IF 3.9 4区物理与天体物理

Ukrainian Journal of Physical Optics Pub Date : 2020-01-01 DOI: 10.3116/16091833/21/3/141/2020

I. Fodchuk, S. Balovsyak, S. Novikov, I. Yanchuk, V. Romankevych

引用次数: 2

Effect of picosecond-laser irradiation on the properties of nanostructured aluminium-doped zinc oxide thin films 皮秒激光辐照对纳米掺铝氧化锌薄膜性能的影响

IF 3.9 4区物理与天体物理

Ukrainian Journal of Physical Optics Pub Date : 2020-01-01 DOI: 10.3116/16091833/21/3/126/2020

M. Khan, A. Almohammedi, W. Farooq

{"title":"Effect of picosecond-laser irradiation on the properties of nanostructured aluminium-doped zinc oxide thin films","authors":"M. Khan, A. Almohammedi, W. Farooq","doi":"10.3116/16091833/21/3/126/2020","DOIUrl":"https://doi.org/10.3116/16091833/21/3/126/2020","url":null,"abstract":"Abstract. Thin films of nanostructured zinc oxide doped with aluminium of different concentrations are synthesized on glass substrates, using a spin-coated sol– gel method. The effect of picosecond-laser irradiation on these thin films is studied using different optical techniques. Their structural and optical properties are investigated using X-ray diffraction, near-visible and infrared absorption spectra and photoluminescence. Optical bandgap values are calculated using a Tauc’s method. Slight variation in the relative intensity of X-ray diffraction and broadening of the lines are observed as a result of laser irradiation that causes some disorder in crystallinity. The relative intensities of the absorption and emission spectra decrease with increasing percentage of aluminium and laser-exposure time. The value of this decrease depends on the dopant concentration. Moreover, the emission reveals a slight red shift. The size of nanocrystals also changes at different Al doping percentages and exposure times. The reduction of the relative intensities mentioned above is attributed to changing nanocrystal sizes and structure of a surface layer.","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69616202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determination of thermal expansion coefficient for thermoelectric CaMnO3 with a shadow method 阴影法测定热电CaMnO3的热膨胀系数

IF 3.9 4区物理与天体物理

Ukrainian Journal of Physical Optics Pub Date : 2020-01-01 DOI: 10.3116/16091833/21/1/26/2020

C. Boonsri, P. Limsuwan, P. Buranasiri

引用次数: 1

Bayesian compressive sensing for synthetic-aperture radar tomography imaging 合成孔径雷达层析成像的贝叶斯压缩感知

IF 3.9 4区物理与天体物理

Ukrainian Journal of Physical Optics Pub Date : 2020-01-01 DOI: 10.3116/16091833/21/4/191/2020

X. Ren, Y. Qin, L. Qiao

引用次数: 0

Characterization of PbO-B2O3-GeO2-La2O3 and PbO-B2O3-SiO2-ZnO glasses: refractive, acoustic, photo-elastic and acousto-optic properties PbO-B2O3-GeO2-La2O3和PbO-B2O3-SiO2-ZnO玻璃的折射、声学、光弹性和声光性能表征

IF 3.9 4区物理与天体物理

Ukrainian Journal of Physical Optics Pub Date : 2020-01-01 DOI: 10.3116/16091833/21/1/47/2020

O. Krupych, I. Martynyuk-Lototska, A. Say, V. Boyko, V. Goleus, Y. Hordieiev, R. Vlokh

引用次数: 12

Photoluminescence spectra of polycrystalline ZnSe in different experimental geometries 不同实验几何形状下多晶ZnSe的光致发光光谱

IF 3.9 4区物理与天体物理

Ukrainian Journal of Physical Optics Pub Date : 2020-01-01 DOI: 10.3116/16091833/21/2/103/2020

I. Abbasov, M. Musayev, J. Huseynov, M. Kostyrko, S. Babayev, G. Eyyubov, S. Aliyeva

{"title":"Photoluminescence spectra of polycrystalline ZnSe in different experimental geometries","authors":"I. Abbasov, M. Musayev, J. Huseynov, M. Kostyrko, S. Babayev, G. Eyyubov, S. Aliyeva","doi":"10.3116/16091833/21/2/103/2020","DOIUrl":"https://doi.org/10.3116/16091833/21/2/103/2020","url":null,"abstract":". We study the photoluminescence in polycrystalline ZnSe synthesized using a chemical vapour-deposition technique, which arises from excitation by the sources of different types and wavelengths. Two experimental geometries are used, which are related to the normal incidence of exciting radiation upon either polished or unpolished ZnSe surfaces. The excitation from the polished surface is carried out by the lasers with the wavelengths λ ex = 335 and 325 nm (i.e., the photon energies higher than the bandgap, hv ex > E g ), semiconductor lasers with λ ex = 532, 642 and 785 nm (i.e., hv ex < E g ) and a xenon lamp. The sample is also excited from the unpolished surface, using the lasers with λ ex = 325 nm ( hv ex > E g ) and λ ex = 532 nm ( hv ex < E g ), as well as the semiconductor laser with λ ex = 532 nm ( hv ex < E g ). Following from our experimental results, we analyze and compare the edge (exciton) luminescence and the impurity-defect luminescence. Different behaviours of the luminescence spectra are observed, which depend on the type of excitation. Instruments) grating 1800 and ANDOR IDUS CCD (DU420-OE respectively them spectral of our","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69615863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Peculiarities of acousto-optic diffraction at circularly polarized acoustic waves. Determination of elasto-optic coefficients coupled with shear waves. Errata 圆偏振声波声光衍射的特性。剪切波耦合弹性光学系数的测定。勘误表

IF 3.9 4区物理与天体物理

Ukrainian Journal of Physical Optics Pub Date : 2020-01-01 DOI: 10.3116/16091833/21/4/201/2020

M. Kostyrko, I. Orykhivskyi, I. Skab, R. Vlokh

{"title":"Peculiarities of acousto-optic diffraction at circularly polarized acoustic waves. Determination of elasto-optic coefficients coupled with shear waves. Errata","authors":"M. Kostyrko, I. Orykhivskyi, I. Skab, R. Vlokh","doi":"10.3116/16091833/21/4/201/2020","DOIUrl":"https://doi.org/10.3116/16091833/21/4/201/2020","url":null,"abstract":". We develop a new approach for determining some of elasto-optic coefficients ( p ij with i = 1…6 and j = 4, 5) basing on Dixon–Cohen method and acousto-optic diffraction at circularly polarized acoustic waves. Particular cases of crystals that belong to trigonal system and some symmetry groups of tetragonal and hexagonal systems are analyzed. We find that the effective elasto-optic coefficients are different for the alternative cases of diffractions at either right- or left-handed circularly polarized acoustic waves that propagate along Z axis in crystals. One can determine in this way the coefficients p 44 and p 45 at the anisotropic diffraction in the crystals belonging to point symmetry groups 4, 4/m, 4 , 6, 6/m and 6 . For the crystals belonging to symmetry groups 32, 3m and 3m , it is possible to determine the coefficients p 14 and p 44 respectively at the isotropic and anisotropic diffractions. Finally, for the crystals described by the groups 3 and 3 , one can determine separately the four coefficients p 44 , p 45 , p 25 and p 14 following from the anisotropic-diffraction data and the two coefficients p 14 and p 25 following from the isotropic-diffraction data.","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69616222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Suppression of hot carriers by nanoporous silicon for improved operation of a solar cell 纳米多孔硅抑制热载流子以改善太阳能电池的运行

IF 3.9 4区物理与天体物理

Ukrainian Journal of Physical Optics Pub Date : 2020-01-01 DOI: 10.3116/16091833/21/4/207/2020

S. Ašmontas, L. Fedorenko, V. Vlasiuk, T. Gorbanyuk, V. Kostylyov, V. Lytovchenko, J. Gradauskas, A. Sužiedėlis, E. Sirmulis, O. Žalys, O. Masalskyi

{"title":"Suppression of hot carriers by nanoporous silicon for improved operation of a solar cell","authors":"S. Ašmontas, L. Fedorenko, V. Vlasiuk, T. Gorbanyuk, V. Kostylyov, V. Lytovchenko, J. Gradauskas, A. Sužiedėlis, E. Sirmulis, O. Žalys, O. Masalskyi","doi":"10.3116/16091833/21/4/207/2020","DOIUrl":"https://doi.org/10.3116/16091833/21/4/207/2020","url":null,"abstract":". The surface of a silicon solar cell is modified to improve its photovoltaic characteristics. Nanostructured porous silicon layer is formed on a front n + -type surface of a p–n junction by means of electrochemical etching accompanied by illumination with a high-power light-emitting diode operating at the wavelength of 365 nm. Addition of the porous layer results in considerable increase in the capacitive photovoltage across the p–n junction. This increase is shown to be stipulated by reduced photonic losses due to anti-reflection coating effect of the porous layer, as well as by decreasing adverse effect of hot carriers on the photovoltage. Broadening of the spectrum of capacitive photovoltage towards the short-wavelength region was observed. This finding is associated with the graded-gap character of the porous layer and photovoltage formation across it as well as with increased absorption of high-energy photons in the porous layer and resulting weaker heating of free carriers.","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69616271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Picosecond-laser processing of stainless steel for fabricating superhydrophobic surfaces 皮秒激光加工制造超疏水表面的不锈钢

IF 3.9 4区物理与天体物理

Ukrainian Journal of Physical Optics Pub Date : 2020-01-01 DOI: 10.3116/16091833/21/4/170/2020

I. Dupliak, Yuchen Liang, Guozhu Yan, Fenping Li, K. Ivaniuk, Xiaogang Li

引用次数: 1