From September 8 to 11, 2025, the 17th International Conference “Correlation Optics 2025” was held at the Scientific and Educational Institute of Physical, Technical and Computer Sciences of Yuriy Fedkovych Chernivtsi National University (CHNU, Ukraine). The conference continues the long-standing series of international meetings on Correlation Optics that began in 1993 (previous SPIE Proceedings volumes: 2108, 2647, 3317, 3904, 4607, 5477, 6254, 7008, 7388, 8338, 9066, 9809, 10612, 11369, 12126, 12938) and is organized by Chernivtsi National University, the National Academy of Sciences of Ukraine (Department of Physics and Astronomy), and the Taizhou Research Institute of Zhejiang University (China).
An important feature of the series is its merger with the International Conference on Singular Optics (Optical Vortices), which had traditionally been held in Crimea since 1997. As a result, singular optics occupies a prominent place and functions as a “conference within the conference.”
The purpose of the meeting was to discuss novel approaches and advances connected with optical correlation techniques for measurements of random optical fields and object diagnostics in diverse applications. The scientific programme covered:
Singular Optics;
Nanooptics;
Informative content of statistical optical fields, including optical chaos, polarization optics and coherence;
Optical correlation devices based on diffractive optical elements (including optical and digital holography, fractal optics, optical sensors);
Optical correlation diagnostics, interferometry and microscopy of rough surfaces and random media;
New applications of correlation optics in biology and medicine;
Optical correlation devices in information technology;
Methods and computer algorithms for intelligent data processing of correlation and singular optics;
Engineering, optical and biomedical devices and systems in tasks of correlation and singular optics;
Digital, information and communication transformation of scientific and educational processes in the context of global changes;
Green engineering, metrology of optical processes and new challenges of engineering-transport technology.
Sessions were conducted in a hybrid format with live presentations and session recordings, enabling broad international participation. Scientists from Australia, Canada, Czech Republic, Denmark, Finland, France, Germany, India, Italy, Israel, Japan, Kazakhstan, Poland, Republic of China, Republic of Korea, Romania, Spain, Switzerland, the United Kingdom and the United States of America took part.
The opening ceremony was held on 8 September. It was followed by the introductory lecture of O. Angelsky (Ukraine), “Introduction to Correlation Optics Conference. From approaches of singular and correlation optics towards effective application of structured light.”
The conference featured a rich programme of invited and plenary lectures. Among the invited speakers who presented were:
G. Gbur (UK) “Deterministic singularities in partially coherent vortex beams”;
J.-Yo. Son (Korea), T. Venkel (Ukraine) “Color Moires for security applications”;
K.Y. Bliokh (DIPC, Spain) “Topologically structured waves and manipulation of particles”;
M. Dennis (UK) “Skyrmionic textures in optical polarisation patterns: Stokes origami”;
W. Wang (UK), M. Takeda (Japan) “Vector Direct Correlation of Electric Fields and Its Application to Unification of Coherence and Polarization of Light”;
L. Marrucci (Italy) “Photonic quantum circuits in free space with structured light”;
A. Dogariu (USA) “Optical Sensing with Structured Wavefronts”;
E. Brasselet (France) “Skyrmionic beam shaping from structured anisotropic media”;
A. Ferrando, Sergi De María-García, Miguel Ángel García-March (Spain) “Hidden Geometric Phases in Dark-Ray Optics”;
Michael Berry (UK) “The singularities of light: intensity, phase, polarization”;
N. Mata-Cervera, D.K. Sharma, Y. Shen, R. Paniagua-Dominguez, M.A. Porras (Spain) “Observation of Natural Stokes Skyrmions in Optical Vortices”;
E.J. Galvez et al. (USA) “Simulating Gravitational Lensing: A new Laboratory Astrophysics Platform using Complex Light”;
T. Petersen (Australia) “Sharp x-ray imaging with a broad scanning beam, using singular aperiodic correlations encoded by Huffman sequences”;
Zhamila Kulchukova (Kazakhstan), Albert Ferrando (Spain), Anton Desyatnikov (Kazakhstan) “Catastrophes in vortex rings reconnections”;
Emilio Pisanty (UK) “Knotted topologies in the polarization state of bichromatic light”;
David Marco et al. (Spain/USA/France) “Optical Skyrmionic distributions: paraxial and nonparaxial, monochromatic and polychromatic”;
N. Litchinitser (USA) “Structuring spatiotemporal states of polarization”;
Zeev Zalevsky (Israel) “Microwave speckle patterns analysis for vital bio-signs monitoring through obstacles”;
Xinzheng (PRC) “Flexible vertical-cavity surface emitting topological laser based on Semenov insulator in the synthetic space”;
A. Shevchenko (Finland) “Optical metasurfaces at higher-order resonances”;
G. Montemezzani, Muhammad Waqar Iqbal and Nicolas Marsal (France) “Vector waves by conical diffraction in modified crystal cascades and semi-cavities”;
V. Podolskiy (USA) “Primordial Metamaterials”;
A. Demchenko (Ukraine) “Molecular Machines: Unidirectional Translocation of Ions powered by Light”;
Tim Lee (Canada) “Advancing polarization speckle-based detection of melanoma in vivo with deep learning”.
Additional oral presentations addressed single-pixel detection of structured light, azimuthally polarized beams generated by liquid-crystal cells, magnetic-field control of topological charge, polarization and energy flows, digital synthesis of random fields, metasurface-based near-field polarization and spin control, optical vortices in multi-stage stressed systems, neutron scattering of flux-line lattices and skyrmions, live-cell microscopy, multimodal microscopy of molecular diffusion, 3D digital polarimetry of biological tissues, Mueller-matrix polarimetry, and Jones-matrix thesiography of blood films, among many others.
Poster sessions were organized daily and covered the full range of conference topics: new applications in biology and medicine; informative content of statistical optical fields; methods and algorithms for intelligent data processing; optical correlation devices based on diffractive elements and holography; engineering, optical and biomedical systems; diagnostics, interferometry and microscopy of rough surfaces and random media; and nanooptics.
A dedicated Students Educational Session took place on 9 September (with online moderation by O. Yermakov). It included presentations by Igor Kashtanov (Slovak Republic) and Oleksandr Arkhelyuk (Ukraine) on reliability and human-factor issues in telecommunication and data-centre systems, by Vasyl Ryukhtin (Czech Republic) and co-authors on neutron imaging and tomography, and an offline lecture by A. Demchenko (Ukraine) on “Fluorescence sensing and superresolution imaging.”
The final day (11 September) continued with contributions on live-cell microscopy toward nanometre resolution, light-powered molecular machines, computer-assisted multimodal microscopy, polarimetric techniques for biological tissues and melanoma detection, and phenomenological interpretation of Mueller matrices.
The 17th International Conference “Correlation Optics 2025” once again confirmed the vitality of the field, the deepening integration of singular and correlation optics with nanooptics, structured light, biology and medicine, and the growing role of intelligent data-processing methods.
Conference program
DAY 1September, 8 |
Opening ceremony09.30 (GMT+3) |
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Plenary Session 1 (GMT+3) Session Chairs – M. Dennis |
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10.00 |
O. Angelsky (Ukraine), Introduction to Correlation Optics Conference. From approaches of singular and correlation optics towards effective application of structured light |
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10.15 |
G. Gbur (UK) (INVITED) Deterministic singularities in partially coherent vortex beams |
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10.55 |
J.-Yo. Son (Korea) T. Venkel (Ukraine) (INVITED) Color Moires for security applications |
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11.35 |
K.Y. Bliokh (DIPC, Spain) (INVITED) Topologically structured waves and manipulation of particles |
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12.15 |
Yoko Miyamoto (Japan) Scattering and change in non-separability of light |
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13.00 |
Lunch |
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Plenary Session 2 (GMT+3) Session Chairs – K.Y. Bliokh, G. Gbur |
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14.00 |
M. Dennis (UK) (INVITED) Skyrmionic textures in optical polarisation patterns: Stokes origami |
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14.40 |
W. Wang (UK), M. Takeda (Japan) (INVITED) Vector Direct Correlation of Electric Fields and Its Application to Unification of Coherence and Polarization of Light |
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15.20 |
L. Marrucci (Italy) (INVITED) Photonic quantum circuits in free space with structured light |
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16.00 |
A. Dogariu (USA) (INVITED) Optical Sensing with Structured Wavefronts |
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16.40–17.40
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Poster Session – New applications of correlation optics in biology and medicine. Digital, information and communication transformation of scientific and educational processes in the context of global changes. |
DAY 2September, 9 |
Singular Optics |
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Plenary Session 1 (GMT+3) Session Chairs – A. Dogariu, T. Petersen |
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09.00 |
V. Kumar, P. S. Badavath (India) Single-pixel Detection of Structured Light |
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9.20 |
E. Brasselet (France) (INVITED) Skyrmionic beam shaping from structured anisotropic media |
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10.00 |
M. Vasnetsov, V. Ponevchinsky, V. G. Nazarenko, P. Zelenov (Ukraine) Beam with azimuth polarization created by liquid crystal θ-cell with π-phase correction |
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10.30 |
Coffee-break |
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11.00 |
A. Ferrando, Sergi De María-García, Miguel Ángel García-March (Spain) (INVITED) Hidden Geometric Phases in Dark-Ray Optics |
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11.40 |
N. Kravets, Gregorio Gonzalez-Cortes, E. Brasselet (France) Magnetic field-controlled topological charge switching of self-induced liquid crystal vortex plates |
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12.00 |
Michael Berry (UK) (INVITED) The singularities of light: intensity, phase, polarization |
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13.00 |
Lunch |
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Plenary Session 2 (GMT+3) Session Chairs – N. Litchinitser, E. Brasselet |
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14.00 |
N. Mata-Cervera, D.K. Sharma, Y. Shen, R. Paniagua-Dominguez, M.A. Porras (Spain) (INVITED) Observation of Natural Stokes Skyrmions in Optical Vortices |
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14.40 |
E.J. Galvez, K. Kendja, T. Nguyen, V. Rodriguez-Fajardo, O. Bulashenko, A. Moreso-Serra (USA) (INVITED) Simulating Gravitational Lensing: A new Laboratory Astrophysics Platform using Complex Light |
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15.20 |
I. Mokhun, A. Bekshaev, Y. Galushko, Y. Viktorovskaya, M. Karabchyivskyi (Ukraine) Polarization, energy flows, angular momentum of an electromagnetic wave |
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15.50 |
P. Litwin (Poland), J. Wroński (Poland), K. Volke-Sepulveda (México), M. Szatkowski (Poland) Dynamic Control of Spatial Coherence via Superposition of Vortex Lattices |
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16.10 |
O. Mys, M. Kostyrko, R. Vlokh (Ukraine), Magnetic field-induced enhancement of acousto-optic diffraction efficiency. |
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16.30–17.30
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Poster Session – Informative content of statistical optical fields, including optical chaos, polarization optics and coherence. Methods and computer algorithms for intelligent data processing of correlation and singular optics. Green engineering, metrology of optical processes and new challenges of engineering-transport technology. |
DAY 2September, 9 |
Students Educational Session |
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(GMT+3) |
Session Chairs – O. Yermakov (online part) |
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14.20 |
Igor Kashtanov (Slovak Republic), Oleksandr Arkhelyuk (Ukraine) Keeping the Lights On: Handling Human Errors and Management Fails in Telco and Data Center Outages (online) |
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15.00 |
Vasyl Ryukhtin (Czech Republic), Miroslav Prituliak, Oleksandr Arkhelyuk, Petro Maksymyak (Ukraine) Neutron imaging and tomography using thermal neutrons (online) |
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15.50 |
A. Demchenko (Ukraine) Fluorescence sensing and superresolution imaging (offline) |
DAY 3September, 10 |
Informative content of statistical optical fields, including optical chaos, polarization optics and coherence.Optical correlation devices based on diffractive optical elements, including optical and digital holography, fractal optics, optical sensors.Optical correlation devices in information technology.Methods and computer algorithms for intelligent data processing of correlation and singular optics.Digital, information and communication transformation of scientific and educational processes in the context of global changes |
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Session 1 (GMT+3) Session Chairs – V. Ryukhtin, A. Ferrando |
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09.00 |
T. Petersen (Australia) (INVITED) Sharp x-ray imaging with a broad scanning beam, using singular aperiodic correlations encoded by Huffman sequences |
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09.40 |
Zhamila Kulchukova (Kazakhstan), Albert Ferrando (Spain), Anton Desyatnikov (Kazakhstan) (INVITED) Catastrophes in vortex rings reconnections |
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10.20 |
Toru Aoki (Japan) GaN X-ray / Gamma-ray detector and imager |
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10.40 |
I. Kashtanov (Slovak Republic), A. Arkhelyuk (Ukraine) Streamline system provisioning |
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11.00 |
Coffee-break |
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11.20 |
S. Hanson (Denmark) Digital implementation of random fields with various combinations of PDF and Spectra, and the associated theoretical values for level crossings. |
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11.40 |
Emilio Pisanty (UK) (INVITED) Knotted topologies in the polarization state of bichromatic light |
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12.20 |
David Marco (Spain), I. Herrera (Spain), Rodrigo Gutiérrez-Cuevas (USA), Sophie Vo (USA), S. Brasselet (France), Miguel A. Alonso (USA) (INVITED) Optical Skyrmionic distributions: paraxial and nonparaxial, monochromatic and polychromatic |
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13.00 |
O. Yermakov (Ukraine, Germany) Near-field polarization and optical spin control with metasurfaces |
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13.20 |
Lunch |
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Session 2 (GMT+3) Session Chairs – S. Hanson, E.J. Galvez |
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14.20 |
R. Zatserkovna, R. Zatserkovnyi, L. Slotska (Ukraine) Augmented reality-based nutrition label recognition and visualization for food packaging |
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14.40 |
N. Litchinitser (USA) (INVITED) Structuring spatiotemporal states of polarization |
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15.20 |
D. Adamenko, I. Skab, and R. Vlokh (Ukraine), Optical vortices generated in multi-stage optical systems with glass optical elements stressed by bending |
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16.00–17.00 |
Poster Session – Optical correlation devices based on diffractive optical elements, including optical and digital holography, fractal optics, optical sensors. Optical correlation devices in information technology. Engineering, optical and biomedical devices and systems in tasks of correlation and singular optics. |
DAY 3September, 10 |
Optical correlation diagnostics, interferometry and microscopy of rough surfaces and random media. Nanooptics. |
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Session 3 (GMT+3) Session Chairs – N. Kravets, Xinzheng |
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09.00 |
Zeev Zalevsky (Israel) (INVITED) Microwave speckle patterns analysis for vital bio-signs monitoring through obstacles |
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09.40 |
Xinzheng (PRC) (INVITED) Flexible vertical-cavity surface emitting topological laser based on Semenov insulator in the synthetic space |
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10.20 |
A. Shevchenko (Finland) (INVITED) Optical metasurfaces at higher-order resonances. |
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11.00 |
Coffee-break |
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11.20 |
G. Montemezzani, Muhammad Waqar Iqbal and Nicolas Marsal (France) (INVITED) Vector waves by conical diffraction in modified crystal cascades and semi-cavities |
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12.00 |
V. Batianova (Ukraine), O. Yermakov (Ukraine, Germany) Spin-directional coupling in hyperbolic shear metasurfaces |
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12.20 |
L.I. Muravsky, O.M. Sharabura, O.G. Kuts (Ukraine) Optical-acoustic method for identification of interfacial disbonds in CFRP-concrete adhesive joints |
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12.40 |
R. Zatserkovna, R. Zatserkovnyi (Ukraine) Color-fade simulation for long-term shelf impact analysis using computer vision |
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13.00 |
Lunch |
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Session 4 (GMT+3) Session Chairs – Wei Wang, Tim Lee |
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14.20 |
Maxim Nikitin, Andrei Lavrinenko, Radu Malureanu (Denmark) Fabrication possibilities for silicon nitride metasurfaces to enhance high order nonlinearities |
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14.40 |
V. Ryukhtin (Czech Republic) Investigations of structures and dynamics of flux line lattices and skyrmions using neutron scattering |
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15.00 |
V. Podolskiy (USA) (INVITED) Primordial Metamaterials |
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15.40 |
G. Gouesbet (France), L.A. Ambrosio (Brasil), J. Shen (PRC) From light to acoustical (more generally scalar) scatterings |
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16.00–17.00 |
Poster Session – Optical correlation diagnostics, interferometry and microscopy of rough surfaces and random media. Nanooptics. |
DAY 4September, 11 |
New applications of correlation optics in biology and medicine. Engineering, optical and biomedical devices and systems in tasks of correlation and singular optics. Green engineering, metrology of optical processes and new challenges of engineering-transport technology |
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Session 1 (GMT+3) Session Chairs – A. Shevchenko, V. Kumar |
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10.00 |
H. Schneckenburger, Ch. Cremer (Germany) Live cell microscopy – moving towards nanometer dimensions |
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10.20 |
A. Demchenko (Ukraine) (INVITED) Molecular Machines: Unidirectional Translocation of Ions powered by Light |
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11.00 |
Aymeric LERAY (France), Computer Assisted Multimodal Microscopy for Quantifying Molecular Diffusion in Cells |
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11.20 |
O. Ushenko, M. Gorsky, I. Mikirin (Ukraine), Jun Zheng, Gebo Chen, Lin Bin (PRC) 3d digital polarimetry of diffuse biological tissues objects |
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12.00 |
Lunch |
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Session 2 (GMT+3) Session Chairs – E. Pisanty |
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13.30 |
Tim Lee (Canada) (INVITED) Advancing polarization speckle-based detection of melanoma in vivo with deep learning |
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14.10 |
Razvigor Ossikovski (USA) Phenomenological interpretation of Mueller matrices in polarimetry: theory and experiment |
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14.30 |
Y. Ushenko (Ukraine), Dou Weidong (PRC), I. Soltys, O. Dubolazov, V. Bachynskyi, O. Lytvynenko, V. Garasym, V. Rozhko (Ukraine) Phase-scanning Jones-matrix thesiography of dehydrated blood films |
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15.00 (GMT+3) |
Closing ceremony |
Poster Session
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R. Kobylianskyi, V. Boichuk (Ukraine) Thermoelectric Sensors for Medical Purposes |
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V.G. Zhytaryuk (Ukraine) "Book review "Instrumentation: Design and Construction of Devices" |
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K. Zolotukhina, S. Melnichenko (Ukraine) Optical characteristics of the digital printing`s imprints |
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A. Maksimyak, S. Shchukin (Ukraine) Back-beam energy flow in perforated microspheres |
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V. Brailovsky, O. Ilarionov, M. Ivanchuk, M. Rozhdestvenska (Ukraine) Thermoanemometric Іndicator |
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