Pub Date : 2021-01-01DOI: 10.3116/16091833/22/2/101/2021
H. Ilchuk, B. Andriyevsky, O. Kushnir, A. Kashuba, I. Semkiv, R. Petrus
{"title":"Electronic band structure of cubic solid-state CdTe1�xSex solutions","authors":"H. Ilchuk, B. Andriyevsky, O. Kushnir, A. Kashuba, I. Semkiv, R. Petrus","doi":"10.3116/16091833/22/2/101/2021","DOIUrl":"https://doi.org/10.3116/16091833/22/2/101/2021","url":null,"abstract":"","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":"22 1","pages":"101-109"},"PeriodicalIF":3.9,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69616490","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: 10.3116/16091833/22/2/83/2021
A. R. Adem, B. P. Ntsime, A. Biswas, Salam Khan, A. K. Alzahrani, M. Belić
. We study stationary optical solitons for the case of Lakshmanan– Porsezian–Daniel model with nonlinear chromatic dispersion and a Kerr law of nonlinear refractive index. The solution is expressed in terms of a special function and its structure is described in details.
{"title":"Stationary optical solitons with nonlinear chromatic dispersion for Lakshmanan-Porsezian-Daniel model having Kerr law of nonlinear refractive index","authors":"A. R. Adem, B. P. Ntsime, A. Biswas, Salam Khan, A. K. Alzahrani, M. Belić","doi":"10.3116/16091833/22/2/83/2021","DOIUrl":"https://doi.org/10.3116/16091833/22/2/83/2021","url":null,"abstract":". We study stationary optical solitons for the case of Lakshmanan– Porsezian–Daniel model with nonlinear chromatic dispersion and a Kerr law of nonlinear refractive index. The solution is expressed in terms of a special function and its structure is described in details.","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":"69616564","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: 10.3116/16091833/22/3/151/2021
Khaustov D. Ye, Khaustov Ya. Ye, Ryzhov Ye, Lychkowskyy, R. Vlokh, Nastishin Yu, Hetman Petro Sahaidachnyi
. We suggest a novel approach for the fusion of visible ( u ) and infrared ( ) images, basing on analogy between the mathematical forms of a Jones vector of elliptically polarized light wave and a complex 2D vector 0 composed of the images u and . Since there is no restriction on which of the two images should be chosen as a real (or imaginary) component, one can construct 0 u i or 0 1 2 , Tr pos iu , where the superscript “ Tr ” denotes the operation of transposing, i.e. 0 the analogy with the Jones vector of light wave, the vector 0 , pos neg can be transformed as 0 , neg pos J , with J being a complex 2 2 -matrix, an analogue of the Jones matrix for optically anisotropic medium. The above analogy with the Jones formalism allows one to synthesize the fused images using three types of the fusion algorithms, ‘amplitude’, ‘azimuth’ and ‘ellipticity’ ones. Varying the components of
{"title":"Jones formalism for image fusion","authors":"Khaustov D. Ye, Khaustov Ya. Ye, Ryzhov Ye, Lychkowskyy, R. Vlokh, Nastishin Yu, Hetman Petro Sahaidachnyi","doi":"10.3116/16091833/22/3/151/2021","DOIUrl":"https://doi.org/10.3116/16091833/22/3/151/2021","url":null,"abstract":". We suggest a novel approach for the fusion of visible ( u ) and infrared ( ) images, basing on analogy between the mathematical forms of a Jones vector of elliptically polarized light wave and a complex 2D vector 0 composed of the images u and . Since there is no restriction on which of the two images should be chosen as a real (or imaginary) component, one can construct 0 u i or 0 1 2 , Tr pos iu , where the superscript “ Tr ” denotes the operation of transposing, i.e. 0 the analogy with the Jones vector of light wave, the vector 0 , pos neg can be transformed as 0 , neg pos J , with J being a complex 2 2 -matrix, an analogue of the Jones matrix for optically anisotropic medium. The above analogy with the Jones formalism allows one to synthesize the fused images using three types of the fusion algorithms, ‘amplitude’, ‘azimuth’ and ‘ellipticity’ ones. Varying the components of","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":"69616300","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: 10.3116/16091833/22/1/1/2021
A. Brzozowski, M. Winkowski, T. Stacewicz
. We present interactive calculative approach and relevant software for designing multi-pass optical cells. Our technique performs the analysis of these cells for any sets of concave spherical mirrors and finds the optimal parameters for both laser cavity and optical system that controls laser beam. In particular, we suggest an open-source, free-of-charge and user-friendly tool for simulating
{"title":"Software for design and analysis of multi-pass absorption cells","authors":"A. Brzozowski, M. Winkowski, T. Stacewicz","doi":"10.3116/16091833/22/1/1/2021","DOIUrl":"https://doi.org/10.3116/16091833/22/1/1/2021","url":null,"abstract":". We present interactive calculative approach and relevant software for designing multi-pass optical cells. Our technique performs the analysis of these cells for any sets of concave spherical mirrors and finds the optimal parameters for both laser cavity and optical system that controls laser beam. In particular, we suggest an open-source, free-of-charge and user-friendly tool for simulating","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":"10 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69616312","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: 10.3116/16091833/22/2/110/2021
O. Mys, I. Orykhivskyi, M. Kostyrko, R. Vlokh
. We use both numerical and analytical approaches when deriving phenomenological relations for the effective elasto-optic coefficients. Anisotropies of the effective elasto-optic coefficients and the acousto-optic (AO) figure of merit are calculated for a particular case of AO interactions in the principal XZ plane of Pb 5 Ge 3 O 11 crystals. Using the approximation of linearly polarized optical eigenwaves, we find that the maximal AO figure of merit for the isotropic diffraction is equal to 30.3×10 –15 s 3 /kg. It is achieved for the AO interactions of the type II at the angle = 10 deg with respect to the X axis. In case of the anisotropic AO diffraction, the appropriate maximum, 12.4×10 –15 s 3 /kg, is reached for the AO interactions of the type IX at the angle = 187.9 deg.
。在推导有效弹光系数的现象学关系时，我们使用了数值方法和解析方法。本文计算了pb5ge3o11晶体主XZ平面上AO相互作用的有效弹光系数和声光优值的各向异性。利用线偏振本征波的近似，我们发现各向同性衍射的最大AO值等于30.3×10 -15 s 3 /kg。它是为II型的AO相互作用实现的角度相对于X轴为10度。在各向异性AO衍射的情况下，IX型AO相互作用在角度= 187.9°处达到了适当的最大值12.4×10 -15 s 3 /kg。
{"title":"Anisotropy of acousto-optic figure of merit in the XZ plane of Pl5Ge3O11 crystals","authors":"O. Mys, I. Orykhivskyi, M. Kostyrko, R. Vlokh","doi":"10.3116/16091833/22/2/110/2021","DOIUrl":"https://doi.org/10.3116/16091833/22/2/110/2021","url":null,"abstract":". We use both numerical and analytical approaches when deriving phenomenological relations for the effective elasto-optic coefficients. Anisotropies of the effective elasto-optic coefficients and the acousto-optic (AO) figure of merit are calculated for a particular case of AO interactions in the principal XZ plane of Pb 5 Ge 3 O 11 crystals. Using the approximation of linearly polarized optical eigenwaves, we find that the maximal AO figure of merit for the isotropic diffraction is equal to 30.3×10 –15 s 3 /kg. It is achieved for the AO interactions of the type II at the angle = 10 deg with respect to the X axis. In case of the anisotropic AO diffraction, the appropriate maximum, 12.4×10 –15 s 3 /kg, is reached for the AO interactions of the type IX at the angle = 187.9 deg.","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":"5 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69616507","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: 10.3116/16091833/22/2/87/2021
P. Golub, M. Vasnetsov
. We report the experiments aimed at controlling the position of linear topological defect (disclination) in a so-called -cell filled with a nematic liquid crystal sandwiched between circularly rubbed polyimide (Kapton) layer and photoaligning PVCN material oriented unidirectionally. To satisfy surface-alignment conditions, the director within this cell experiences a twist. The topological defect appears in a plane where the twist angle of the director becomes indeterminate ( 90º). In an achiral liquid crystal, orientation of the disclination coincides with the alignment occurring on the unidirectionally oriented substrate. The idea of this work is to control the alignment direction on the substrate by a polarized ultraviolet light. Photo-induced director reorientation on the substrate changes the twist angle in the bulk and so varies the azimuthal angle of the disclination. We monitor reorientation of the disclination as a function of light-polarization angle and irradiation dose.
{"title":"Photo-alignment control of topological defects in nematic liquid-crystal cells","authors":"P. Golub, M. Vasnetsov","doi":"10.3116/16091833/22/2/87/2021","DOIUrl":"https://doi.org/10.3116/16091833/22/2/87/2021","url":null,"abstract":". We report the experiments aimed at controlling the position of linear topological defect (disclination) in a so-called -cell filled with a nematic liquid crystal sandwiched between circularly rubbed polyimide (Kapton) layer and photoaligning PVCN material oriented unidirectionally. To satisfy surface-alignment conditions, the director within this cell experiences a twist. The topological defect appears in a plane where the twist angle of the director becomes indeterminate ( 90º). In an achiral liquid crystal, orientation of the disclination coincides with the alignment occurring on the unidirectionally oriented substrate. The idea of this work is to control the alignment direction on the substrate by a polarized ultraviolet light. Photo-induced director reorientation on the substrate changes the twist angle in the bulk and so varies the azimuthal angle of the disclination. We monitor reorientation of the disclination as a function of light-polarization angle and irradiation dose.","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":"69616584","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: 10.3116/16091833/22/3/128/2021
Defa Hu, Hailiang Shi
{"title":"Cubic�quartic optical solitons in Lakshmanan�Porsezian�Daniel model derived with semi-inverse variational principle","authors":"Defa Hu, Hailiang Shi","doi":"10.3116/16091833/22/3/128/2021","DOIUrl":"https://doi.org/10.3116/16091833/22/3/128/2021","url":null,"abstract":"","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":"69616688","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 : 2020-01-01DOI: 10.3116/16091833/21/1/1/2020
O. Krupych, M. Kostyrko, D. Adamenko, I. Skab, R. Vlokh
We analyze acousto-optic interactions for the case when a divergent diffracted optical beam propagates along one of the optic axes in biaxial crystals. We demonstrate that the diffracted beam reveals a specific spatial distribution of polarization states and transfers an optical vector-vortex field. It can be referred to as an optical vector-vortex beam with inseparable polarization and spatial states. At least intra-system entanglement occurs between different degrees of freedom, which are represented by the spin and orbit angular momentums in our case. The spatial orientation of the beam can be controlled while changing the angle between the optic axes. This is achieved by tuning the wavelength of optical radiation and the acoustic wave frequency. We have performed basic calculations using a particular example of optically biaxial triglycine sulfate crystals and assuming that the initial acoustic wave frequency amounts to 50 MHz and the light wavelength changes from 400 to 675 nm. Then the resulting acoustic frequency can increase up to 133 MHz for the longitudinal acoustic mode and 93 MHz or 89 MHz for the two transverse modes. In other words, one can build a generator of optical vortices and operate their spatial orientation, using triglycine sulfate.
{"title":"Tracking of optic axis with an acousto-optically diffracted beam: generation of vector-vortex beam in triglycine sulfate crystals","authors":"O. Krupych, M. Kostyrko, D. Adamenko, I. Skab, R. Vlokh","doi":"10.3116/16091833/21/1/1/2020","DOIUrl":"https://doi.org/10.3116/16091833/21/1/1/2020","url":null,"abstract":"We analyze acousto-optic interactions for the case when a divergent diffracted optical beam propagates along one of the optic axes in biaxial crystals. We demonstrate that the diffracted beam reveals a specific spatial distribution of polarization states and transfers an optical vector-vortex field. It can be referred to as an optical vector-vortex beam with inseparable polarization and spatial states. At least intra-system entanglement occurs between different degrees of freedom, which are represented by the spin and orbit angular momentums in our case. The spatial orientation of the beam can be controlled while changing the angle between the optic axes. This is achieved by tuning the wavelength of optical radiation and the acoustic wave frequency. We have performed basic calculations using a particular example of optically biaxial triglycine sulfate crystals and assuming that the initial acoustic wave frequency amounts to 50 MHz and the light wavelength changes from 400 to 675 nm. Then the resulting acoustic frequency can increase up to 133 MHz for the longitudinal acoustic mode and 93 MHz or 89 MHz for the two transverse modes. In other words, one can build a generator of optical vortices and operate their spatial orientation, using triglycine sulfate.","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":"21 1","pages":"1-7"},"PeriodicalIF":3.9,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69615567","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 : 2020-01-01DOI: 10.3116/16091833/21/2/57/2020
A. Say, I. Martynyuk-Lototska, O. Mys, D. Adamenko, M. Kostyrko, O. Gomonnai, R. Vlokh
. Temperature dependences of relative elongation, thermal expansion coefficient, birefringence increment and angle of optical indicatrix rotation are studied for TlIn(S 1–x Se x ) 2 crystals (x = 0, 0.02 and 0.06). We have found that all of these crystals reveal at least two diffused phase transitions (PTs), from normal phase to incommensurate phase and from incommensurate phase to ferroelectric phase. The temperature regions where these PTs take place are determined. A low-temperature PT represents a diffused PT of the first order. We have detected with our techniques that the solid solution with x = 0.02 is non-uniformly stressed. These internal stresses can be caused by a polytype structure. An additional anomaly in the temperature dependence of thermal expansion coefficient occurring at the temperature T 1 = 214 K in the compound with x = 0.06 also points to the existence of polytype structure.
． 研究了TlIn(s1 - x Se x) 2晶体(x = 0、0.02和0.06)相对延伸率、热膨胀系数、双折射增量和光学指标旋转角的温度依赖性。我们发现所有这些晶体都显示出至少两个扩散相变(PTs)，从正常相到不匹配相和从不匹配相到铁电相。这些PTs发生的温度区域是确定的。低温PT表示一级扩散PT。我们用我们的技术检测到x = 0.02的固溶体是非均匀受力的。这些内应力可以由多型结构引起。在x = 0.06的化合物中，温度t1 = 214 K时热膨胀系数的温度依赖性异常也表明了多型结构的存在。
{"title":"Temperature dependences of optical indicatrix and thermal expansion parameters of TlIn(S1�xSex)2 solid solutions (x = 0, 0.02 and 0.06)","authors":"A. Say, I. Martynyuk-Lototska, O. Mys, D. Adamenko, M. Kostyrko, O. Gomonnai, R. Vlokh","doi":"10.3116/16091833/21/2/57/2020","DOIUrl":"https://doi.org/10.3116/16091833/21/2/57/2020","url":null,"abstract":". Temperature dependences of relative elongation, thermal expansion coefficient, birefringence increment and angle of optical indicatrix rotation are studied for TlIn(S 1–x Se x ) 2 crystals (x = 0, 0.02 and 0.06). We have found that all of these crystals reveal at least two diffused phase transitions (PTs), from normal phase to incommensurate phase and from incommensurate phase to ferroelectric phase. The temperature regions where these PTs take place are determined. A low-temperature PT represents a diffused PT of the first order. We have detected with our techniques that the solid solution with x = 0.02 is non-uniformly stressed. These internal stresses can be caused by a polytype structure. An additional anomaly in the temperature dependence of thermal expansion coefficient occurring at the temperature T 1 = 214 K in the compound with x = 0.06 also points to the existence of polytype structure.","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":"1 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69615901","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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