Mr. Ivan I. Lyatun Profile

Ivan I. Lyatun

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Publications (13)

Proceedings Article | 20 November 2024 Paper

Detection of methotrexate molecules in human plasma by SERS method

Elizaveta Demishkevich, Svetlana Doktorova, Andrey Zyubin, Vladimir Rafalskiy, Alexander Zozulya, Anna Kundalevich, Denis Evtifeev, Ivan Lyatun, Ilya Samusev

Proceedings Volume 13242, 132421F (2024) https://doi.org/10.1117/12.3036059

KEYWORDS: Nanoparticles, Vibration, Surface enhanced Raman spectroscopy, Plasma, Raman spectroscopy

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Proceedings Article | 4 January 2023 Poster + Presentation + Paper

Spectral shift of the plasmon maximum on the rough anodized Ti surface in the presence of PVA films with Bi2O3 and Bi2O3/Tm2O3 complexes

Dmitry Artamonov, Anna Tsibulnikova, Ilia Samusev, Ivan Lyatun, Valery Bryukhanov

Proceedings Volume 12322, 1232211 (2023) https://doi.org/10.1117/12.2640935

KEYWORDS: Titanium, Polyvinyl alcohol, Polymers, Oxides, Reflection, Bismuth, Plasmons, Absorption, Plasmonics, Thulium

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Proceedings Article | 9 October 2021 Poster + Presentation + Paper

Optical properties of Cu/Au surfaces structures induced by fs laser exposure with circular polarization

A. Khankaev, A. Tcibulnikova, I. Samusev, I. Lyatun, V. Slezhkin, V. Bryukhanov

Proceedings Volume 11904, 119041J (2021) https://doi.org/10.1117/12.2602570

KEYWORDS: Copper, Optical properties, Femtosecond phenomena, Reflection, Gold, Dielectric polarization, Pulsed laser operation, Surface plasmons

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Proceedings Article | 9 October 2021 Poster + Presentation + Paper

The plasmon splitting reflectance spectra on anodized titanium surface in the presence of Yb2O3 upconversion luminescence

A. Tcibulnikova, N. Myslitskaya, V. Slezhkin, V. Bruykhanov, I. Samusev, A. Khankaev, M. Demin, I. Lyatun

Proceedings Volume 11904, 119041H (2021) https://doi.org/10.1117/12.2602340

KEYWORDS: Titanium, Reflection, Plasmons, Surface plasmons, Refractive index, Luminescence, Upconversion, Surface roughness

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Proceedings Article | 21 September 2021 Paper

Study of the applicability of nano-polycrystalline diamond as a material for refractive x-ray lenses

I. Snigireva, T. Irifune, T. Shinmei, P. Medvedskaya, S. Shevyrtalov, G. Bourenkov, M. Polikarpov, S. Rashchenko, A. Snigirev, Ivan Lyatun

Proceedings Volume 11837, 1183703 (2021) https://doi.org/10.1117/12.2594675

KEYWORDS: X-rays, Diamond, Crystals, Scattering, Scanning electron microscopy, Raman scattering, Lenses, Laser scattering, Carbon, X-ray imaging

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Proceedings Article | 10 May 2021 Poster + Presentation + Paper

Plasmon polarized spectra on gold films modified with femtosecond laser induced surface structures

Artemiy Khankaev, Anna Tcibulnikova, Ilya Samusev, Valery Bryukhanov, Maxim Demin, Ivan Lyatun

Proceedings Volume 11772, 1177229 (2021) https://doi.org/10.1117/12.2596521

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Proceedings Article | 18 April 2021 Paper

X-ray interferometry technique for thin-films study using an x-ray microfocus laboratory source

M. Voevodina, S. Lyatun, D. Zverev, A. Barannikov, I. Lyatun, I. Snigireva, A. Snigirev

Proceedings Volume 11776, 1177609 (2021) https://doi.org/10.1117/12.2589495

KEYWORDS: X-rays, X-ray sources, Thin films, X-ray optics, Interferometry, Sensors, X-ray detectors, Synchrotrons, Multilayers, Temporal resolution

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Proceedings Article | 18 April 2021 Paper

X-ray refractive glass microlenses produced by ion beam lithography

P. Medvedskaya, I. Lyatun, K. Golubenko, V. Yunkin, I. Snigireva, A. Snigirev

Proceedings Volume 11776, 117760I (2021) https://doi.org/10.1117/12.2589310

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Proceedings Article | 27 August 2020 Poster + Paper

Ion beam lithography for coherent x-ray optics application

P. Medvedskaya, I. Lyatun, S. Shevyrtalov, M. Polikarpov, I. Snigireva, V. Yunkin, A. Snigirev

Proceedings Volume 11491, 1149111 (2020) https://doi.org/10.1117/12.2568427

KEYWORDS: Lenses, X-ray optics, Ion beam lithography, Diamond, X-rays, Laser ablation, Synchrotrons, Manufacturing, Radio optics, Scanning electron microscopy

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Proceedings Article | 21 August 2020 Paper

Refractive optics based x-ray reflecto-interferometry

S. Lyatun, I. Lyatun, D. Zverev, O. Konovalov, I. Snigireva, A. Snigirev

Proceedings Volume 11491, 114910N (2020) https://doi.org/10.1117/12.2567988

KEYWORDS: X-rays, X-ray optics, Reflectivity, Silicon, Thin films, Sensors, Lenses, Spatial resolution, Refractive index

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Proceedings Article | 21 August 2020 Presentation + Paper

X-ray interferometry technique using an x-ray microfocus laboratory source

M. Voevodina, S. Lyatun, A. Barannikov, I. Lyatun, I. Snigireva, A. Snigirev

Proceedings Volume 11492, 114920L (2020) https://doi.org/10.1117/12.2568499

KEYWORDS: X-rays, X-ray optics, X-ray sources, Reflectometry, Thin films, Sensors, Lenses, Interferometry, Silicon

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Proceedings Article | 1 April 2020 Presentation + Paper

Transformation of refractive index spectra for titanium rough surfaces

Ilia Samusev, Anna Tcibulnikova, Vasily Slezhkin, Karina Matveeva, Maksim Demin, Artemiy Khankaev, Ivan Lyatun, Valery Bryukhanov

Proceedings Volume 11344, 1134422 (2020) https://doi.org/10.1117/12.2556727

KEYWORDS: Titanium, Dielectrics, Refractive index, Oxides, Surface plasmons, Visible radiation, Optical properties, Interfaces, Reflection, Solar energy

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Proceedings Article | 29 May 2018 Presentation

Fabrication of 3D x-ray compound refractive lenses by two-photon polymerization lithography (Conference Presentation)

Natalia Kokareva, Alexander Petrov, Vladimir Bessonov, Ksenia Abrashitova, Kirill Safronov, Aleksandr Barannikov, Petr Ershov, Nataliya Klimova, Ivan Lyatun, Vyacheslav Yunkin, Maxim Polikarpov, Irina Snigireva, Andrey Fedyanin, Anatoly Snigirev

Proceedings Volume 10675, 106750E (2018) https://doi.org/10.1117/12.2307371

KEYWORDS: Lenses, Two photon polymerization, X-rays, Lithography, X-ray lithography, X-ray optics, Absorption, Beryllium, Visible radiation, Scanning electron microscopy

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X-ray microscopy is advantageous over conventional optical microscopy because of its high resolution and capability to study the inner structure of materials opaque to visible light. Furthermore, this method does not require metallization and vacuum and therefore it can be used to visualize fragile biological samples that cannot be studied by scanning electron microscopy. Focusing X-ray optics may be roughly divided into three groups based on the physical principle of focusing: reflection, diffraction and refraction. The reflection optics includes curved mirrors, multilayers and capillaries; the diffractive optics includes Fresnel zone plates. Refractive optics comprises X-ray compound refractive lenses (CRLs) that are widely used nowadays because of their compactness and ease of fabrication. Focusing performance of the CRL is determined by the refractive index, absorption, the inner structure of the CRL material and the geometry of the lens. The optimal shape for the lens is parabolic with a small radius of curvature, because the smaller radius of the parabola leads to shorter focal distance and therefore allows to achieve higher resolution. The common choice of the CRL material is beryllium. However the resolution of Be lenses is far below theoretically predicted limits because of the parasitic scattering introduced by the grains in the material. Moreover the existing manufacturing technologies do not allow to achieve radius of curvature less than 50 μm. Polymer materials are also popular for the CRL microfabrication because of their amorphous nature, ease of structuring and low price. Among the advanced lithographic techniques the two-photon polymerization lithography (2PP) holds a special place. It is based on polymer solidification by means of two-photon absorption. Nonlinear character of two-photon absorption leads to the transparency of the out-of focus material, while presence of polymerization threshold reduces resolution far below diffraction limit. Therefore 2PP can be used for fabrication 3D structures of almost arbitrary shape including overhanging and self-intersecting structures. In this work we introduce the 3D X-ray CRL fabricated by 2PP from the commercially available photoresist ORMOCOMP. Hundred double concave individual lenses formed a CRL with the 60 μm distance between adjacent lenses. Radius of curvature of a single parabolic surface was 3 μm that is comparable to radius of 2D silicon nano-lens made by conventional lithography and much less than achievable radius of 3D Be lens. Physical aperture was 28 μm. The optimal processing parameters (power, incident on the sample, and velocity of the laser beam waist movement) were determined. The fabricated CRL was studied by scanning electron microscopy. It was shown that surface of the lens is smooth and the geometrical parameters do not deviate significantly from that of the model. Focusing performance of lenses was studied by the knife-edge technique. It was obtained that the focal distance is not larger than 2 cm at the energy of 9.25 keV. The radiation resistance of the CRL was tested at the synchrotron DESY: PETRA-III. The CRL was exposed at the non-focused X-ray radiation with the standard power and the energy of 12 keV for more than 10 hours without visible degradation.

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