GENERAL INFORMATION

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REGISTRATION

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All participants are kindly asked to register and submit an abstract to catp25.sofia@gmail.com by 05 June 2025 . Please fill out our Registration form in .docx or .pdf format. The abstract template can be found here.

You will receive an acceptance notification by 10 June 2025 at the latest.

You are kindly asked to uphold the times given.

Important dates	Date
Registration open:	01 Mar 2025
Registration deadline:	20 May 2025
Abstract submission:	05 June 2025

Registration fees	Early bird - until 01 June 2025	Regular – after 01 June 2025
Regular participants	250 €	300 €
PhD students	150 €	200 €
Students	100 €	150 €

The conference fee gives access to all conference sessions + coffee breaks + lunches + conference materials + printed and digital digital version of the book of abstracts.

CONTRIBUTIONS

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Please submit the abstract via email, following the instructions given. The abstract submission is until 05 June 2025.

Plenary Talk	Key Talk	Invited Talk	Poster
60 min	45 min	25 min	Poster

All participants who have chosen to present a poster at CATP’25 may do so in person (at conference venue: Faculty of Physics). In order to prepare the poster presentation, we inform that the maximal poster dimensions are A0, i.e. 84 cm (width) and 119 cm (height). Poster presenters are kindly asked to prepare a pdf version of their posters which will uploaded on the conference website.

All posters will participate in The BEST poster award competition. We are happy to announce that the 3 best posters will be awarded.

We kindy ask poster presenters at CATP’25 to send the .pdf poster file to catp25.sofia@gmail.com prior to attending the conference.

PROGRAMME

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Below you can find the preliminary program for CATP'25.

List of Plenary, Key and Invited talks and Poster presentations:

PLENARY TALKS (60 mins)

P1. Controllable Beam Splitting, Spectral Broadening and Coherent Beam Recombination by Vortex Lattices – Alexander Dreischuh (Faculty of Physics, Sofia University, Sofia, Bulgaria)

P2. Scrutinizing Nonlinear Photoionization using High-Harmonics – Matthias Kuebel (Friedrich Schiller University, Jena, Germany)

P3. Advanced optical image processing with ultra-thin optics – Dragomir N. Neshev (ARC Centre of Excellence for Transformative Meta-Optical Systems (TMOS), Dept. of Electronics Materials Engineering, Australian National University, ACT, Australia)

P4. Time-Resolved Infrared Spectroscopy in Material Science – Hristo Iglev (Physics Department E11, School of Natural Sciences, Technical University of Munich, Germany)

P5. Nanoscale Cross-Sectional Imaging Using High Harmonics – Gerhard G. Paulus (Friedrich Schiller University, Jena, Germany)

P6. Attosecond-to-Zeptosecond X-ray Physics and Quantum Optics – Tenio Popmintchev (University of California San Diego, Physics Department, Center for Advanced Nanoscience, California, USA)

KEY TALKS (45 mins)

К1. TBA – Allen Weeks (Extreme Light Infrastructure)

К2. Strong Electron Correlations, Attosecond Rabi Oscillations, and Angular Momentum of X-rays – Sotir Chervenkov (Faculty of Physics, Sofia University, Bulgaria, and Disco Hi-Tec Europe GmbH, Kirchheim bei Munich, Germany, and University of California San Diego, California, USA)

К3. Study of Chirped Pulse Amplification Performance of Yb:CALYGLO Laser Crystal – Lyuben Petrov (Faculty of Physics, Sofia University, Sofia, Bulgaria)

К4. Spontaneous super-resolution is enabled in a confocal microscope by super-linear emitters – Denitza Denkova (Institut de Ciencies Fotoniques (ICFO), Castelldefels, Barcelona, Spain)

К5. Quantum-enhanced Fluorescence Microscopy – Valerio Gili (Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Jena, Germany)

К6. 2D materials toward optoelectronic and photonic devices – Vera Marinova (Institute of Optical Materials and Technologies, Bulgarian Academy of Science)

К7. Generation and Propagation of Nondiverging Beams by Using Specially Designed Diffractive Optical Elements – Suzana Topuzoski (Faculty of natural sciences and mathematics, Institute of physics, Ss Cyril and Methodius University in Skopje, R. North Macedonia)

К8. All Optical Transistor Effect in Silicon Based Metasurface – Ivan Buchvarov (Faculty of Physics, Sofia University, Sofia, Bulgaria)

К9. Optics of Broadband Laser Pulses, Polarization Forces and New Regime of Tunnel Ionization – Lubomir Kovachev (Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria)

INVITED TALKS (20 mins)

I1. High-Speed/High-Density Reversible Optical Data Storage in Azopolymer Materials Based on Digital Polarization Holography – Lian Nedelchev (Institute of Optical Materials and Technologies, Bulgarian Academy of Sciences and University of Chemical Technology and Metallurgy, Sofia, Bulgaria)

I2. Laser Induced Reverse Transfer for Fabrication of Metal Oxide Structures for Sensor Applications – Nikolay Nedyalkov (Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria)

I3. Double-minimum Potential Energy Curves from Spectroscopic Point of View – Asen Pashov (Faculty of Physics, Sofia University, Sofia, Bulgaria)

I4. Physical Vapor Deposition (PVD) of Antibacterial and Biocompatible Thin Films and Coatings – Stefan Valkov (Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria)

I5. Gouy Phase of Structured Laser Beams – Aleksander Stefanov (Faculty of Mathematics and Informatics, Sofia University, Sofia, Bulgaria)

I6. 3D Visualization of Inverted Domains in Nonlinear Photonic Crystals by Cherenkov Second Harmonic Generation Microscopy – Kaloyan Koynov (Max-Planck Institute for Polymer Research, Mainz, Germany)

I7. Correlative Fluorescence and Soft X-Ray Microscopy in the Water Window Region in an Integrated Lab-based Setup – Sophia Kaleta (Helmholtz Institute, Jena, Germany and Institute of Optics and Quantum Electronics, Jena, Germany)

I8. Metalenses for SWIR Imaging in Space Applications – Hristo Iliev (Faculty of Physics, Sofia University, Sofia, Bulgaria)

I9. Synthesis and Application of 2D Mo-Based Chalcogenides – Blagovest Napoleonov (Institute of Optical Materials and Technologies, Bulgarian Academy of Sciences, Sofia, Bulgaria)

I10. Periods of Energy Exchange under the Mutual Effects of Four-Wave Mixing, Self-Phase Modulation and Cross-Phase Modulation – Anelia Dakova-Mollova (Physics and Technology Faculty, University of Plovdiv, Plovdiv Bulgaria and Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria and Department of Physics, School of Science and Technology, Sefako Makgatho Health Sciences University, Pretoria, South Africa)

I11. Study of Laser Polarization Dependent Photoexcitation and High Harmonic Generation in Semiconductors – Tzveta Apostolova (Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria and Institute for Advanced Physical Studies, New Bulgarian University, Sofia, Bulgaria)

I12. Quantum Teleportation of Arbitrary Two-qubit States Along Linear Chain Clusters – Branislav Ilich (Sofia University, Center for quantum technologies - CQT)

I13. Robust, Fast and High-Fidelity Composite Single-qubit Gates for Superconducting Transmon Qubits – Hristo Tonchev (Sofia University, Center for quantum technologies - CQT)

POSTER PRESENTATIONS

P1. Machine Learning with Insufficient Data for Edible Oil Mixtures Classification by Means of LIF Spectra – Christina Andreeva (Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria and Faculty of Physics, Sofia University St. Kliment Ohridski, Sofia, Bulgaria).

P2. Towards Optimized LIPSS Designs of Solar Panel Glass for Creating Self-cleaning, Anti-fouling Surfaces with Improved Efficiency – Liliya Angelova (Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria).

P3. Synthesis of Metal Oxide Nanocomposites by Atmospheric PLD – Anna Dikovska (Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria).

P4. Choice between diabatic or adiabatic approximation by double-well potentials – Anna Dimova (Faculty of Physics, Sofia University St. Kliment Ohridski, Sofia, Bulgaria)

P5. Vortex Structures in Linear Optical Fibers with a Step-Index Profile – Boris Dobrev (Physics and Technology Faculty, University of Plovdiv, Plovdiv, Bulgaria).

Boris Dobrev (Physics and Technology Faculty, University of Plovdiv, Plovdiv, Bulgaria). – Tsanislava Genova (Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria).

P7. Laser beam splitter/coupler (at 1.55 μm wavelength) with nanostructured plates of ion-implanted PMMA – Nasko N. Gorunski (Faculty of Physics, Sofia University, Sofia, Bulgaria).

P8. Partially Coherent Anti-Stokes Raman Scattering (pCARS) in Transparent Molecular Liquids by Nanosecond Laser Pulses (Numerical Modeling) – Georgi B. Hadjichristov (Laboratory of Optics & Spectroscopy, Institute of Solid-State Physics, Bulgarian Academy of Sciences, Sofia, Bulgaria).

P9. Real time characterization of Stokes polarization parameters using rotating quarter-wave retarder – Hristo Iliev (Faculty of Physics, Sofia University, Sofia, Bulgaria).

P10. Squaraine Dyes for Sensitization of TiO2/GO Photocatalytic Nanocomposites` – Petya Karakashkova (Institute of Catalysis, Bulgarian Academy of Sciences, Sofia, Bulgaria).

P11. Laser Light Diffraction by Dynamic Periodic Patterns Field-induced in Anisotropic Media – Boyko Katranchev (Institute of Solid-State Physics, Bulgarian Academy of Sciences, Sofia, Bulgaria).

P12. Determination and Controlling of the Gouy Phase of Laser Beams Carrying Vortex Necklace-like Structures – Edmon Lazarov (Faculty of Physics, Sofia University, Sofia, Bulgaria).

P13. 2D-nanolayers of WSe2 and their Heterostructures for Photonics Applications – Maria Martinova (Institute of Optical Materials and Technologies, Bulgarian Academy of Sciences, Sofia, Bulgaria).

P14. Power Superbroadening with Two Tunable Pulse Families and Delos-Thorson Equivalence Under Time-Dependent Phase Modulation – Ivo Mihov (Sofia University “St. Kliment Ohridski” Center for quantum technologies - CQT).

P15. Polarization Mapping of Birefringent Elements Generating Singular Beams – Maria Mincheva (Department of Quantum electronics, Faculty of Physics, Sofia University, Sofia, Bulgaria).

P16. Photoswitchable Photochromic Spirooxazines for Optical Sensing – Stela Minkovska (Institute of Catalysis, Bulgarian Academy of Sciences, Sofia, Bulgaria).

P17. Optical Stretchers for 1 μm Lasers - Challenges and Specific Designs – Marta Mladenova (Faculty of Physics, Sofia University, Sofia, Bulgaria).

P18. M2-factors and Gouy phases of annihilated vortex beams – Dimitar Nachevski (Department of Quantum electronics, Faculty of Physics, Sofia University, Sofia, Bulgaria).

P19. Quasi-Phase Matching and Crystal Segmentation for Robust Optical Parametric Amplification – Andon Rangelov (Faculty of Physics, Sofia University, Sofia, Bulgaria)

P20. Thermal Measurements and Characterization of Novel Yb:CALYGLO Crystals for High-Performance Ultrafast Lasers – Stefan Shishkov (Faculty of Physics, Sofia University, Sofia, Bulgaria).

P21. Laser spectroscopy of highly-luminescent europium complexes upon excitation with femtosecond pulses – Ivan L. Stefanov (Faculty of Physics, Sofia University, Sofia, Bulgaria).

P22. Hyperfine Structure and Line Intensities of Selected (B1?-c3S+)?a3S+ Fluorescence in KRb, NaK and NaRb – Velizar Stoyanov (Faculty of Physics, Sofia University, Sofia, Bulgaria).

P23. Exploring Alternative Mechanisms for Non-Sequential Double Ionization with Silicon Ions – Miles Thoma (Institute of Optics and Quantum Electronics, Friedrich Schiller-University Jena, Germany).

P24. Simple Spectral Shaper for Sub 100 Fs Yb Based Chirped Pulse Amplifiers – Iriney Vasilev (Faculty of Physics, Sofia University, Sofia, Bulgaria).

P25. Nonstationary Optical Forces and Collision-Driven Ionization Beyond Traditional Keldysh Regimes – Maria-Gabriela Zheleva (Institute of Solid-State Physics, Bulgarian Academy of Sciences, Sofia, Bulgaria).

P26. Synchronous Fluorescence Spectroscopy for Quantitative Analysis of Essential Oils – Alexandra Zhelyazkova (Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria).

P27. Plasmonic Hot Spots in Conductive Ag Nanowire Meshes – Anton Zyapkov (Department of Solid-State Physics and Microelectronics, Faculty of Physics, Sofia, Bulgaria).

VENUE

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Address: Sofia University, Center of Excellence UNITe, James Bourchier 5 blvd., Sofia, Bulgaria.

Transport connections:

• Tram Line 10: stop “Milin kamyk”
• Bus Lines 67, 94, 102: stop “Seminariya” + 5 min by foot
• Subway Line 2: station “James Bourchier” + 10 min by foot

ORGANIZING AND SCIENTIFIC COMMITTEE

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Organizing committee:

• Dr. Lyubomir Stoyanov
• Dr. Maya Zhekova
• Prof. Alexander Dreischuh

CONTACTS

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Contact us: catp25.sofia@gmail.com