Pub Date : 2021-01-01DOI: 10.3116/16091833/22/3/138/2021
M. Illienko, Y. Pilgun, Ye. Smirnov
. We consider simultaneous diffractions of light by two lobes of sound radiation pattern in an acousto-optic modulator which is built on SiO 2 single crystal and has two-element phased-array transducer with the fixed phase shift . Implementation of this diffraction type greatly improves power efficiency of the device. Transducer shaping is used to steer the lobes and satisfy the Bragg’s conditions for simultaneous acousto-optic diffractions. The conditions of the diffraction are defined and a mathematical model for calculating diffraction efficiency is suggested. It is shown that a parallel diffraction regime is almost three times more energy-efficient than a serial regime. Several configurations of transducer elements’ shape are analyzed. In particular, changes in the dimensions of diamond-shaped elements are shown to allow adjusting the operating frequency within 23%. An experimental sample of the device is built.
{"title":"Simultaneous acousto-optic diffractions by two lobes of a shaped phased-array transducer","authors":"M. Illienko, Y. Pilgun, Ye. Smirnov","doi":"10.3116/16091833/22/3/138/2021","DOIUrl":"https://doi.org/10.3116/16091833/22/3/138/2021","url":null,"abstract":". We consider simultaneous diffractions of light by two lobes of sound radiation pattern in an acousto-optic modulator which is built on SiO 2 single crystal and has two-element phased-array transducer with the fixed phase shift . Implementation of this diffraction type greatly improves power efficiency of the device. Transducer shaping is used to steer the lobes and satisfy the Bragg’s conditions for simultaneous acousto-optic diffractions. The conditions of the diffraction are defined and a mathematical model for calculating diffraction efficiency is suggested. It is shown that a parallel diffraction regime is almost three times more energy-efficient than a serial regime. Several configurations of transducer elements’ shape are analyzed. In particular, changes in the dimensions of diamond-shaped elements are shown to allow adjusting the operating frequency within 23%. An experimental sample of the device is built.","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":"1 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69616239","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}
Pub Date : 2021-01-01DOI: 10.3116/16091833/22/2/69/2021
I. Yaremchuk, A. Pidluzhna, P. Stakhira, O. Kuntyi, L. Sus, V. Savaryn, A. Kostruba, V. Fitio, Y. Bobitski
. Gold-nanorod arrays of a quasi-hexagonal shape are successfully obtained with electrochemical deposition method and their optical properties are investigated. The optical response of a two-layer structure, in which the first layer is a nanocomposite consisting of Au nanorods and the second one is a thin indium tin oxide film on a glass substrate, has been analyzed. Dependences of absorption cross-section of Au nanorods on the light wavelength at different eccentricities are modelled using electrostatic approximation. It is shown that longitudinal plasmon resonance prevails over other resonances for the Au nanorods deposited on glass substrates. A Maxwell−Garnett theory and a matrix method are used to predict the optical characteristics of the whole structure. We have demonstrated that it is possible to estimate the concentration of nanorods on the surface using the appropriate simulation results. In addition, efficient absorption properties can be obtained at a given wavelength by changing the geometry of nanorods. In particular, there is a shift of the absorption peak towards near-infrared region whenever the nanorods become high enough and smaller in diameter.
{"title":"Surface-localized plasmon resonance in a system of randomly arranged gold nanorods on a dielectric substrate","authors":"I. Yaremchuk, A. Pidluzhna, P. Stakhira, O. Kuntyi, L. Sus, V. Savaryn, A. Kostruba, V. Fitio, Y. Bobitski","doi":"10.3116/16091833/22/2/69/2021","DOIUrl":"https://doi.org/10.3116/16091833/22/2/69/2021","url":null,"abstract":". Gold-nanorod arrays of a quasi-hexagonal shape are successfully obtained with electrochemical deposition method and their optical properties are investigated. The optical response of a two-layer structure, in which the first layer is a nanocomposite consisting of Au nanorods and the second one is a thin indium tin oxide film on a glass substrate, has been analyzed. Dependences of absorption cross-section of Au nanorods on the light wavelength at different eccentricities are modelled using electrostatic approximation. It is shown that longitudinal plasmon resonance prevails over other resonances for the Au nanorods deposited on glass substrates. A Maxwell−Garnett theory and a matrix method are used to predict the optical characteristics of the whole structure. We have demonstrated that it is possible to estimate the concentration of nanorods on the surface using the appropriate simulation results. In addition, efficient absorption properties can be obtained at a given wavelength by changing the geometry of nanorods. In particular, there is a shift of the absorption peak towards near-infrared region whenever the nanorods become high enough and smaller in diameter.","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":"1 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69616555","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}
Pub Date : 2021-01-01DOI: 10.3116/16091833/22/1/31/2021
B. Turko, U. Mostovoy, M. Kovalenko, Y. Eliyashevskyi, Y. Kulyk, O. Bovgyra, V. Dzikovskyi, A. Kostruba, R. Vlokh, V. Savaryn, V. Stybel, B. Tsizh, S. Majevska
. We study the crystalline structure and absorption spectra for the zinc oxide films with different levels of yttrium doping. The films are deposited on glass substrates, using radio-frequency magnetron sputtering. We estimate the concentration of free charge carriers and show that the ‘blue’ shift of the fundamental absorption edge in ZnO:Y films with increasing doping level (up to 4.7 wt. %) is explained by Burstein–Moss effect. At higher concentrations of yttrium, behaviour of the fundamental absorption edge is described by a known empirical Urbach rule.
{"title":"Effect of dopant concentration and crystalline structure on the absorption edge in ZnO:Y films","authors":"B. Turko, U. Mostovoy, M. Kovalenko, Y. Eliyashevskyi, Y. Kulyk, O. Bovgyra, V. Dzikovskyi, A. Kostruba, R. Vlokh, V. Savaryn, V. Stybel, B. Tsizh, S. Majevska","doi":"10.3116/16091833/22/1/31/2021","DOIUrl":"https://doi.org/10.3116/16091833/22/1/31/2021","url":null,"abstract":". We study the crystalline structure and absorption spectra for the zinc oxide films with different levels of yttrium doping. The films are deposited on glass substrates, using radio-frequency magnetron sputtering. We estimate the concentration of free charge carriers and show that the ‘blue’ shift of the fundamental absorption edge in ZnO:Y films with increasing doping level (up to 4.7 wt. %) is explained by Burstein–Moss effect. At higher concentrations of yttrium, behaviour of the fundamental absorption edge is described by a known empirical Urbach rule.","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":"1 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69616389","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}
Pub Date : 2021-01-01DOI: 10.3116/16091833/22/1/38/2021
E. Zayed, R. Shohib, M. Alngar, A. Biswas, M. Ekici, Salam Khan, A. K. Alzahrani, M. Belić
. We recover the cases of solutions in the shape of bright, dark and singular optical solitons for the self-phase modulation effect, which belongs to the type of N. A. Kudryashov’s sextic power-law nonlinearity of refractive index. Three different integration schemes have been implemented. These are a unified Riccati equation, our new mapping scheme and our addendum to the common N. A. Kudryashov’s method. All of the solitons are enlisted and the criterions of their existence are mentioned. Finally, we extract three appropriate conservation laws.
。我们恢复了属于N. A. Kudryashov折射率的六次方幂律非线性型的自相位调制效应的亮、暗、奇异光孤子解的情况。已经实施了三种不同的集成方案。这是一个统一的里卡蒂方程，我们的新映射方案和我们对常见的N. a . Kudryashov方法的补充。列出了所有的孤子，并提到了它们存在的标准。最后，我们提取了三个合适的守恒定律。
{"title":"Optical solitons and conservation laws associated with Kudryashov�s sextic power-law nonlinearity of refractive index","authors":"E. Zayed, R. Shohib, M. Alngar, A. Biswas, M. Ekici, Salam Khan, A. K. Alzahrani, M. Belić","doi":"10.3116/16091833/22/1/38/2021","DOIUrl":"https://doi.org/10.3116/16091833/22/1/38/2021","url":null,"abstract":". We recover the cases of solutions in the shape of bright, dark and singular optical solitons for the self-phase modulation effect, which belongs to the type of N. A. Kudryashov’s sextic power-law nonlinearity of refractive index. Three different integration schemes have been implemented. These are a unified Riccati equation, our new mapping scheme and our addendum to the common N. A. Kudryashov’s method. All of the solitons are enlisted and the criterions of their existence are mentioned. Finally, we extract three appropriate conservation laws.","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":"1 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69616399","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}
Pub Date : 2021-01-01DOI: 10.3116/16091833/22/1/53/2021
I. Helzhynskyy, S. Kutsiy, S. Albota
. We study electroluminescence and impedance properties of a double-type white organic light-emitting device (WOLED) based on phosphorescent and thermally activated delayed fluorescence emissions in a single heterostructure. Current–voltage characteristics of the WOLED and impedance spectroscopy data are obtained for the layered and composite-layer devices. These results demonstrate that a combination of layer-based and composite-based technologies in a single heterostructure improves both the efficiency and the stability of WOLED heterostructures. Light-emission performance of the WOLED is also studied. The device reveals very good electroluminescence properties and colour coordinates as a white light source. Its maximal brightness is larger than 10 4 cd/m 2 and the maximal external quantum efficiency is larger than 12%.
{"title":"Electro-optic properties of double-type emission of organic electroluminescence device","authors":"I. Helzhynskyy, S. Kutsiy, S. Albota","doi":"10.3116/16091833/22/1/53/2021","DOIUrl":"https://doi.org/10.3116/16091833/22/1/53/2021","url":null,"abstract":". We study electroluminescence and impedance properties of a double-type white organic light-emitting device (WOLED) based on phosphorescent and thermally activated delayed fluorescence emissions in a single heterostructure. Current–voltage characteristics of the WOLED and impedance spectroscopy data are obtained for the layered and composite-layer devices. These results demonstrate that a combination of layer-based and composite-based technologies in a single heterostructure improves both the efficiency and the stability of WOLED heterostructures. Light-emission performance of the WOLED is also studied. The device reveals very good electroluminescence properties and colour coordinates as a white light source. Its maximal brightness is larger than 10 4 cd/m 2 and the maximal external quantum efficiency is larger than 12%.","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":"1 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69616441","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}
Pub Date : 2021-01-01DOI: 10.3116/16091833/22/2/92/2021
T. Ha, Y. Won, D. Seo
{"title":"25-km long transmission and real-time detection of 5-GBd/s optical QPSK data using external phase-error compensation","authors":"T. Ha, Y. Won, D. Seo","doi":"10.3116/16091833/22/2/92/2021","DOIUrl":"https://doi.org/10.3116/16091833/22/2/92/2021","url":null,"abstract":"","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":"22 1","pages":"92-100"},"PeriodicalIF":3.9,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69616628","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}
Pub Date : 2021-01-01DOI: 10.3116/16091833/22/4/239/2021
Y. Yıldırım, A. Biswas, P. Guggilla, S. Khan, H. Alshehri, M. Belic
. For the first time in the field of nonlinear optics, we address cubic–quartic solitons appearing in the fibre Bragg gratings with dispersive reflectivity for four different cases of nonlinear refractive-index structures. A complete spectrum of single solitons, together with some straddled solitons, emerges from the integration scheme adopted by us, which is the approach of sine–Gordon equation. within this integration scheme, which is discussed in this work. The details will be sketched after a brief introduction into our model.
{"title":"Optical solitons in fibre Bragg gratings with third- and fourth-order dispersive reflectivities","authors":"Y. Yıldırım, A. Biswas, P. Guggilla, S. Khan, H. Alshehri, M. Belic","doi":"10.3116/16091833/22/4/239/2021","DOIUrl":"https://doi.org/10.3116/16091833/22/4/239/2021","url":null,"abstract":". For the first time in the field of nonlinear optics, we address cubic–quartic solitons appearing in the fibre Bragg gratings with dispersive reflectivity for four different cases of nonlinear refractive-index structures. A complete spectrum of single solitons, together with some straddled solitons, emerges from the integration scheme adopted by us, which is the approach of sine–Gordon equation. within this integration scheme, which is discussed in this work. The details will be sketched after a brief introduction into our model.","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":"1 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69616847","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}
Pub Date : 2021-01-01DOI: 10.3116/16091833/22/4/209/2021
Karbovnyk, Sadovyi, Turko, Kukhta, Vasil’yev, Horyn, Kulyk, Eliyashevskyi, Kostruba, Savaryn, V. Stybel, S. Majevska, Ivan Franko
. We show that the degree of linear polarization of the photoluminescence of tris-(8-hydroxyquinoline)aluminium (Alq 3 ) thin film can be increased by about 10 times, using a method of oblique-angle deposition. This is due to greater ordering of molecular alignment in this thin film.
{"title":"Polarized photoluminescence of Alq3 thin films obtained by the method of oblique-angle deposition","authors":"Karbovnyk, Sadovyi, Turko, Kukhta, Vasil’yev, Horyn, Kulyk, Eliyashevskyi, Kostruba, Savaryn, V. Stybel, S. Majevska, Ivan Franko","doi":"10.3116/16091833/22/4/209/2021","DOIUrl":"https://doi.org/10.3116/16091833/22/4/209/2021","url":null,"abstract":". We show that the degree of linear polarization of the photoluminescence of tris-(8-hydroxyquinoline)aluminium (Alq 3 ) thin film can be increased by about 10 times, using a method of oblique-angle deposition. This is due to greater ordering of molecular alignment in this thin film.","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":"1 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69616818","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}
Pub Date : 2021-01-01DOI: 10.3116/16091833/22/4/198/2021
O. Krupych, I. Martynyuk-Lototska, I. Orykhivskyi, D. Adamenko, M. Kostyrko, R. Vlokh
. We demonstrate experimentally that acousto-optic diffraction by a shear acoustic wave propagating in fused silica can transform linear or circular polarization states into their orthogonal counterparts. It is also shown that a corresponding acousto-optic cell with a shear acoustic wave propagating in a vitreous medium can be used as a NOT or CNOT gate. The advantage of our method is a possibility for spatial manipulation by qubits via acousto-optic diffraction under condition of changing frequency of the acoustic wave.
{"title":"Implementation of optical quantum gate for polarization-encoded qubits via acousto-optic diffraction by shear acoustic waves in vitreous media","authors":"O. Krupych, I. Martynyuk-Lototska, I. Orykhivskyi, D. Adamenko, M. Kostyrko, R. Vlokh","doi":"10.3116/16091833/22/4/198/2021","DOIUrl":"https://doi.org/10.3116/16091833/22/4/198/2021","url":null,"abstract":". We demonstrate experimentally that acousto-optic diffraction by a shear acoustic wave propagating in fused silica can transform linear or circular polarization states into their orthogonal counterparts. It is also shown that a corresponding acousto-optic cell with a shear acoustic wave propagating in a vitreous medium can be used as a NOT or CNOT gate. The advantage of our method is a possibility for spatial manipulation by qubits via acousto-optic diffraction under condition of changing frequency of the acoustic wave.","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":"1 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69616409","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}
Pub Date : 2021-01-01DOI: 10.3116/16091833/22/4/216/2021
I. Studenyak, M. Pop, I. Shender, A. Pogodin, M. Kranjčec
. Ag 6 PS 5 I single crystals are grown from solution–melt by means of a vertical zone crystallization method. Dispersion of the refractive index of Ag 6 PS 5 I measured with a spectral ellipsometry technique is described by a known Wemple– DiDomenico relation. The fundamental absorption edge for the Ag 6 PS 5 I crystals is studied in the temperature range 77–300 K. The temperature dependences of the optical pseudogap and the Urbach energy are analyzed in the framework of Einstein model. The parameters of electron–phonon interaction, which results in the Urbach behaviour of the fundamental absorption edge, are determined. The influence of temperature and structural disorderings on the optical absorption in Ag 6 PS 5 I is studied.
{"title":"Temperature behaviour of fundamental absorption edge in superionic Ag6PS5I crystals","authors":"I. Studenyak, M. Pop, I. Shender, A. Pogodin, M. Kranjčec","doi":"10.3116/16091833/22/4/216/2021","DOIUrl":"https://doi.org/10.3116/16091833/22/4/216/2021","url":null,"abstract":". Ag 6 PS 5 I single crystals are grown from solution–melt by means of a vertical zone crystallization method. Dispersion of the refractive index of Ag 6 PS 5 I measured with a spectral ellipsometry technique is described by a known Wemple– DiDomenico relation. The fundamental absorption edge for the Ag 6 PS 5 I crystals is studied in the temperature range 77–300 K. The temperature dependences of the optical pseudogap and the Urbach energy are analyzed in the framework of Einstein model. The parameters of electron–phonon interaction, which results in the Urbach behaviour of the fundamental absorption edge, are determined. The influence of temperature and structural disorderings on the optical absorption in Ag 6 PS 5 I is studied.","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":"1 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69616825","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}
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