Sergey Kudryashov- Doctor of science, Habil.
- Lab leader, leading researcher at P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Sergey Kudryashov
- Doctor of science, Habil.
- Lab leader, leading researcher at P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Projects in optoelectronics and photonics
About
636
Publications
72,759
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6,637
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Introduction
Merry, ironical and sceptical person interested in ultrafast moderate-intensity laser-induced dynamics in any matter around
Current institution
Current position
- Lab leader, leading researcher
Additional affiliations
October 2020 - present
Lededev Physical Institute
Position
- Principal Investigator
September 2002 - April 2004
October 2006 - October 2020
Lebedev Phyiscal Institute, Russian Academy of Sciences
Position
- Seniour researcher
Education
September 1986 - November 1994
Publications
Publications (636)
The supercontinuum and third harmonic generation by focused infrared femtosecond laser pulses in distilled water in its normal and anomalous dispersion regions has been studied. Competition between the corresponding third-order nonlinearities has been detected: for pump wavelengths of 900–1200 nm (in the normal dispersion region), supercontinuum wi...
The broadening of the spectral absorption range of crystalline silicon to the near-and mid-IR region is possible by doping it using ion implantation and subsequent annealing methods. Pulsed laser annealing makes it possible to eliminate ion-induced defects, recrystallization of the crystal structure, and activation of impurities. The crystal struct...
The possibility of the femtosecond laser structural micromodification (microlabeling) of diamond through a solid immersion layer made of Ge 7 Se 93 chalcogenide glass at a wavelength of 1.55 μm has been investigated. The two-photon absorption coefficient of Ge 7 Se 93 has been measured to be β 2 = (0.09 ± 0.01) cm/GW, which allows the propagation o...
This paper introduces a novel approach to the design of multi-element planar
solar concentrators, aimed at optimizing solar energy harvesting systems. The proposed
methodology is based on the integration of identical unit cells, strategically arranged to
enhance solar radiation capture efficiency and achieve high angular selectivity. Mathematical
m...
The development of planar integrated systems using silicon as the main material for the near-infrared spectral region is an important area of research due to its favourable properties, such as high compatibility with existing CMOS semiconductor technology and economic efficiency. However, the indirect bandgap of silicon (Eg = 1.12 eV) poses difficu...
Though ultrafast non-linear photonics were broadly harnessed in applications to diverse dielectric materials over the last decades, it was scarcely utilized in diamond research, being limited by self-focusing, high-harmonics and multi-photon luminescence generation. However, recent atomistic single-photon source, lasing and laser nanoscale encoding...
Расширение спектрального диапазона поглощения кристаллического кремния до ближней и средней инфракрасной области возможно посредством его легирования с помощью технологий ионной имплантации и последующего отжига. Импульсный лазерный отжиг позволяет провести устранение ионно-индуцированных дефектов, рекристаллизацию кристаллической структуры и актив...
A method has been proposed for photoinduced hyperthermia of pathogenic Gram-negative bacteria P. aeruginosa using Gd 2 O 3 :Yb micropowder. It is based on the possibility of laser excitation of anti-Stokes luminescence on ytterbium ions in the gadolinium oxide micropowder, which allows us, on the one hand, to heat the powder to the required tempera...
The objective of this work was to study the antibacterial effect of metal nanoparticles applied by laser-induced forward transfer on a wound infection model using pig skin. Nanoparticles were applied by laser-induced forward transfer using a nanosecond laser. The effect of nanoparticles was studied on five bacterial strains. Scanning electron micro...
A structural center formed in Ib-type synthetic diamond after irradiation with 3-MeV electrons and annealing at 1200°C for 30 min has been studied initially using electron paramagnetic resonance. It is similar to the R5-R12 paramagnetic centers in the conditions of the formation and characteristics, but unlike them, the studied center is more symme...
1030-nm, 300-fs laser inscription of separate microvoxels in bulk PMMA was performed at different peak laser intensities I 0 and exposures N. The microvoxel arrays were characterized by optical microscopy regarding the feature morphology, photoluminescence and Raman microspectroscopy regarding their morphological (voxel length and diameter) and str...
Micromodification in bulk undoped polymethylmethacrylate (PMMA) by single focused (numerical aperture (NA) = 0.25), 1030-nm 250-fs laser pump pulses was explored by pump self-transmittance; optical, 3D-scanning confocal photoluminescence (PL); Raman micro-spectroscopy; and optical polarimetric and interferometric microscopy. Starting from the thres...
In the context of the rapidly increasing resistance of microorganisms to antibiotics, it is necessary to look for new methods of combating them. At present, metal nanoparticles are receiving much attention and are increasingly being used as antibacterial agents. In this work, the direct comparative analysis of the antibacterial properties of silver...
Спектры фотолюминесценции доминирующих Н3-, Н4-центров в природном алмазе, предварительно охарактеризованном методами оптической и инфракрасной спектрофотометрии, возбуждались фемтосекундными лазерными импульсами с длиной волны накачки 470 нм и варьируемой интенсивностью. Насыщение интенсивности фотолюминесценции Н3-, Н4-центров, нормированной на и...
Исследованы самофокусировка и фазовая самомодуляция сфокусированного фемтосекундного лазерного импульса в плавленом кварце. В зависимости от энергии лазерного импульса наблюдались три различных режима: 1) линейный, когда эффект самофокусировки незначителен, характеризующийся линейным спектральным уширением; 2) переходной, когда за счет самофокусиро...
Метод прямой безабляционной фемтосекундной лазерной печати был использован для изготовления метаповерхности в виде упорядоченных массивов полых нановыпуклостей на поверхности тонкой пленки золота. Наличие резонансных провалов в спектрах отражения изготовленных метаповерхностей, а также 100-кратное резонансное усиление интенсивности генерации третье...
Сплавные наночастицы Si1−xGex контролируемого состава были получены методом наносекундной лазерной абляции в изопропаноле кремний-германиевых мишеней. Синтезированный продукт демонстрирует поликристаллическую структуру и одномодальное распределение по размеру с преимущественным содержанием частиц микронного диаметра, а также сохраняет стехиометрию...
Экспериментально исследовано нелинейное поглощение ультракоротких лазерных импульсов с интенсивностями 0.17–1.7 ТВт/см2 на длине волны собственного двухфононного поглощения (4673 нм) в алмазе типа IIb. Показано, что основным механизмом поглощения в исследуемом образце является двухфотонное поглощение с коэффициентом β2 = 72 ± 7 см/ТВт. При помощи м...
Фемтосекундными лазерными импульсами через оптический контакт с сильнорефрактивной иммерсионной средой из сульфида цинка произведена запись считываемой фотолюминесцентной микрометки в объеме алмаза. Показано влияние сильнорефрактивной иммерсионной среды на положение и размер конфокальной области при считывании люминесцентной микрометки. Установлено...
В работе проведено исследование антибактериальных свойств пленок ZnO/CuO, активируемых при освещении светодиодной лампой со спектром излучения, близким к естественному солнечному свету, на примере антибиотико-резистентной бактериальной культуры S.aureus. Антибактериальные свойства пленок связаны с фотоиндуцированной электропорацией клеток вследстви...
Конфокальная микроспектроскопия комбинационного рассеяния света предоставляет возможность диагностики рака путем количественного анализа спектральных особенностей и выявления основных биохимических изменений. Была проведена дифференциация злокачественных новообразований кожи (базальноклеточной карциномы кожи, плоскоклеточной карциномы), доброкачест...
В работе предложен метод фотоиндуцированной гипертермии патогенных грамотрицательных бактерий P. aeruginosa с использованием микропорошка Gd2O3:Yb. Предлагаемый метод гипертермии основан на возможности возбуждения лазерным излучением антистоксовой люминесценции на ионах иттербия в микропорошке оксида гадолиния, что позволяет с одной стороны осущест...
Novel nitridation/nitrogen doping process for silicon (Si) surfaces was developed, performing plasma-mediated pulsed laser treatment of a Si wafer in a liquid-nitrogen environment. Scanning electron microscopy and energy-dispersive X-ray spectroscopy were used to characterize surface microtopography and analyzed chemical composition (carbon ∼7–20 a...
Photo-induced modification in bulk undoped polymethylmethacrylate (PMMA) by single tightly focused (numerical aperture NA = 0.25), 1030-nm 250-fs laser pulses was explored by means of pump self-transmittance, optical, 3D scanning confocal photoluminescence (PL) and Raman micro-spectroscopy, as well as optical polarimetric and interferometric micros...
Photo-induced modification in bulk undoped polymethylmethacrylate (PMMA) by single tightly focused (numerical aperture NA = 0.25), 1030-nm 250-fs laser pulses was explored by means of pump self-transmittance, optical, 3D scanning confocal photoluminescence (PL) and Raman micro-spectroscopy, as well as optical polarimetric and interferometric micros...
Photo-induced modification in bulk undoped polymethylmethacrylate (PMMA) by single tightly focused (numerical aperture NA = 0.25), 1030-nm 250-fs laser pulses was explored by means of pump self-transmittance, optical, 3D scanning confocal photoluminescence (PL) and Raman micro-spectroscopy, as well as optical polarimetric and interferometric micros...
Photo-induced modification in bulk undoped polymethylmethacrylate (PMMA) by single tightly focused (numerical aperture NA = 0.25), 1030-nm 250-fs laser pulses was explored by means of pump self-transmittance, optical, 3D scanning confocal photoluminescence (PL) and Raman micro-spectroscopy, as well as optical polarimetric and interferometric micros...
A novel double-impurity doping process for silicon (Si) surfaces was developed, utilizing nanosecond-laser melting of an 11 nm thick gold (Au) top film and a Si wafer substrate in a laser plasma-activated liquid nitrogen (LN) environment. Scanning electron microscopy revealed a fluence-and exposure-independent surface micro-spike topography, while...
Novel double-impurity doping process for silicon (Si) surfaces was developed, utilizing nanosecondlaser
melting of a top 11-nm thick gold (Au) film and a Si wafer substrate in a laser plasma-activated liquidnitrogen
(LN) environment. Scanning electron microscopy revealed the fluence- and exposure-independent
surface micro-spike topography, while en...
Direct interband and intragap photoexcitation by intense mid-infrared (4.0 and 4.7 μm) femtosecond (fs) laser pulses was explored in ultrapure chemical-vapor deposited (CVD) diamond via acquisition of characteristic ultraviolet photoluminescence of free excitons and A-band photoluminescence of electrons anchored at deep donor-acceptor or dislocatio...
Spectral range of crystalline silicon absorption could be extended to near- and even mid-infrared region by its hyperdoping via ion-implantation technology, requiring the following thermal annealing for removing ion-induced defects, recrystallizing the crystalline structure and activating the doping impurity. In this article, the crystalline struct...
Прямое межзонное и внутрищелевое фотовозбуждение фемтосекундными лазерными импульса-ми среднего ИК-диапазона (длина волны λ = 4.0, 4.7 мкм) исследовано в сверхчистом химически-осажденном алмазе, используя характеристическую УФ фотолюминесценцию свободных экситонов и А-полосы электронов, захваченных внутри диэлектрической щели на глубоких донорно-ак...
We present the study of the antibacterial properties of ZnO/CuO films, activated by LED lamp light with an emission spectrum close to that of natural sunlight, on an example of antibiotic-resistant S. aureus bacterial culture. The antibacterial properties of films with photoinduced electroporation lead to the emergence of a potential difference bet...
Citation: Rimskaya, E.; Gorevoy, A.; Shelygina, S.; Perevedentseva, E.; Timurzieva, A.; Saraeva, I.; Melnik, N.; Kudryashov, S.; Kuchmizhak, A. Multi-Wavelength Raman; rimskaya@lebedev.ru (E.R.); a.gorevoy@lebedev.ru (A.G.); shelyginasn@lebedev.ru (S.S.); perevedencevaev@lebedev.ru (E.P.); a.timurzieva@lebedev.ru (A.T.); saraevain@lebedev.ru (I.S.)...
Direct ablation-free femtosecond laser printing has been used to fabricate a metasurface in the form of ordered arrays of hollow nanobumps on the surface of a thin gold film. Resonant dips in the reflection spectra of fabricated metasurfaces, as well as a resonant increase in the third-harmonic intensity by two orders of magnitude, at the spectral...
Si 1-x Ge x alloy nanoparticles with controlled composition have been obtained by nanosecond laser ablation of silicon-germanium targets in isopropanol. The synthesized product exhibits a polycrystalline structure and a unimodal size distribution with a predominant content of microparticles and retains the stoichiometry of the composition of the ta...
Confocal Raman microspectroscopy provides the ability to diagnose cancer by quantitatively analyzing spectral features and identifying underlying biochemical changes. The differentiation of malignant skin neoplasms (basal cell carcinoma, squamous cell carcinoma), benign skin neoplasms (papilloma) and healthy skin was carried out by obtaining Raman...
The nonlinear absorption of ultrashort laser pulses with intensities of 0.17-1.7 TW/cm 2 at an intrinsic two-photon absorption wavelength of 4673 nm in type IIb diamond has been studied experimentally. It has been shown that the main absorption mechanism in the studied sample is two-photon absorption with a coefficient of β 2 = (72 ± 7) cm/TW. Tran...
Diamond is a unique optical material with ultra-hard lattice, which properties can be altered by optically active doping defects combined with carbon interstitials and vacancies. Direct laser writing by focused ultrashort laser pulses enables local modification of color centers in diamonds with excellent three-dimensional positioning accuracy, prov...
Исследованы изменения фазового набега и длины, а также пространственной структуры двулучепреломляющих микротреков, записанных в объеме плавленого кварца в режиме жесткой фокусировки(числовая апертура NA = 0.45 и 0.55) лазерными импульсами с длиной волны 1030 нм, длительностью
0.3 и 0.6 пс, при варьировании энергии импульсов. Показано, что по мере у...
Исследованы характеристики двулучепреломляющих микротреков, записанных ультракороткими лазерными импульсами с варьируемыми параметрами в объёме плавленого кварца. В частности, наблюдается образование двулучепреломляющих микротреков с фазовым сдвигом до 150o, при этом направление медленной оси совпадает с направлением вектора линейной поляризации ин...
The photoluminescence spectra of the dominant H3 and H4 centers in a natural diamond sample, which is preliminarily characterized by optical and infrared spectrophotometry, are excited by femtosecond laser pulses with a wavelength of 470 nm and varying intensity. Saturation of the photoluminescence intensity of the H3 and H4 centers normalized by t...
Появление кремниевой фотоники за последние два десятилетия создало условия для того, чтобы кремний стал предпочтительной платформой для фотонной интеграции. В этом обзоре мы предлагаем наш взгляд на растущую область интегральной фотоники ближнего инфракрасного диапазона на кремнии и перспективные технологии обеспечения этого роста. Представлен комп...
Unusual A-band spectra with well-resolved quasi-periodical phonon progressions of multiple peaks (N\(\sim \)9) were excited in a natural diamond by 515-nm, 300-fs laser pulses at variable pre-heating temperatures of 24-200oC. The non-radiative multi-phonon part of the relaxation path was comparable with the total relaxation energy (zero-phonon line...
Using femtosecond laser pulses delivered through an optical contact with a highly refractive zinc sulfide immersion medium, a readable photoluminescent micromark was written in the bulk of diamond. The influence of a highly refractive immersion medium on the position and size of the confocal region when reading a luminescent micromark is shown. It...
The single-pass one-step method for printing conductive silver tracks on a glass surface, using the laser-induced forward transfer (LIFT) technique, was proposed, providing a unique opportunity for high-throughput printing of surface micro- and nanostructures with high electrical conductivity and positioning accuracy. This method was developed via...
The feasibility of printing silver and copper conductive elements on a glass substrate in a one- step through the laser-induced forward transfer method has been successfully demonstrated. The topography of the resulting elements was analyzed, using scanning electron microscopy. Investigation of their chemical composition was conducted by means of e...
11.12.2023 г. В окончательной редакции 09.01.2024 г. Принята к публикации 16.01.2024 г. Микроспектроскопия комбинационного рассеяния света является важным методом диагностики рака кожи на ранних стадиях. Проведена дифференциация злокачественных новообразований кожи (базальноклеточные карциномы кожи, плоскоклеточные карциномы), доброкачественных нов...
Self-focusing and self-phase modulation of focused femtosecond laser pulse were studied in bulk fused silica. Depending on pulse energy magnitude, three different regimes were observed in the experiment: 1) linear regime, when the self-focusing effect is insignificant, characterized by linear spectral broadening; 2) transition regime, when the self...
Micro-joule UV-range (350–415 nm) femtosecond-laser pulses generated via frequency-doubled parametric conversion of 525-nm 150-fs pulses of Yb-glass laser were used for “hot” photoluminescence excitation in a diamond plate enriched by blue-emitting N3-centers (zero-phonon line, ZPL, at 415 nm). Photoluminescence spectra acquired in the range of 400...
Self-phase modulation (SPM) broadening of prompt laser spectra was studied in a transmission mode in natural and synthetic diamonds at variable laser wavelengths (515 and 1030 nm), pulse energies and widths (0.3–12 ps, positively chirped pulses), providing their filamentary propagation. Besides the monotonous SPM broadening of the laser spectra ver...
Light-trapping micro- and nanostructures generated on various material surfaces have garnered significant interest in recent years due to their pivotal role in various scientific and technological applications. Direct laser writing has emerged as a prominent, versatile, and practical method for fabricating these structures. In this study, we employ...
Micro-joule UV-range (350-415 nm) femtosecond laser pulses generated via frequency-doubled parametric conversion of 525-nm 150-fs pulses of Yb-glass laser were used for “hot” photoluminescence excitation in a diamond plate enriched by blue-emitting N3-centers (zero-phonon line, ZPL, at 415 nm). Photoluminescence spectra acquired in the range of 400...
Micro-joule UV-range (350-415 nm) femtosecond laser pulses generated via frequency-doubled parametric conversion of 525-nm 150-fs pulses of Yb-glass laser were used for “hot” photoluminescence excitation in a diamond plate enriched by blue-emitting N3-centers (zero-phonon line, ZPL, at 415 nm). Photoluminescence spectra acquired in the range of 400...
This research work focuses on investigating the darkening phenomenon in soda-lime glasses caused by the formation of color centers when exposed to infrared femtosecond laser radiation. The study examines the kinetics of color center generation and thermal relaxation, with a particular emphasis on the influence of storage temperature. Additionally,...
The investigation of plasma channels induced by focused ultra-short 1030-nm laser pulses in bulk of synthetic High Pressure High Temperature (HPHT) diamond revealed strong dependence of their spatial parameters on the used numerical aperture of the lens (NA = 0.15-0.45). It was shown that at weak focusing conditions it is possible to significantly...
Surface modification of titanium nickelide (Ti–Ni) alloy improves its properties, forming a barrier oxidized/carbonized subsurface layer, which blocks the release of toxic nickel ions. We have modified Ti–Ni alloys by structuring the surface with sub-picosecond laser at different radiation parameters. The modified surface was characterized using sc...
Confocal scanning Raman and photoluminescence (PL) microspectroscopy is a structure-sensitive optical method that allows the non-invasive analysis of biomarkers in the skin tissue. We used it to perform in vitro diagnostics of different malignant skin neoplasms at several excitation wavelengths (532, 785 and 1064 nm). Distinct spectral differences...
The investigation of plasma channels induced by focused ultra-short 1030-nm laser pulses in bulk of synthetic HPHT diamond revealed strong dependence of their size and shape on the used numerical aperture of the lens (NA=0.15-0.45). It was shown that at loose focusing conditions, it is possible to significantly increase the length of the plasma cha...
Self-phase modulation (SPM) broadening of laser spectra was studied in a transmission mode in natural and synthetic diamonds at variable laser wavelengths (515 and 1030 nm), pulse energies and widths (0.3 - 12 ps, positively chirped pulses), providing their filamentary propagation. Besides the monotonous SPM broadening of the laser spectra versus p...
The changes that appeared in the crystal structure of a natural diamond under the influence of a pulsed femtosecond laser (525 nm) were comprehensively investigated using Fourier-transform infrared (FT-IR), electron paramagnetic resonance (EPR), and photoluminescence (PL) spectroscopy methods. It is shown that changes in the crystal structure occur...
Tightly focused 515-nm, 0.3-ps laser pulses modify in a laser filamentation regime the crystalline structure of an Ib-type high-pressure, high-temperature (HPHT) synthesized diamond in a thin-plate form. The modified microregions (micromarks) in the yellow and colorless crystal zones, possessing different concentrations of elementary substitutional...
In this paper, we report the study of the low-voltage locally enhanced electric field treatment (LEEFT) of E. coli bacteria via TEM analysis and FT-IR and Raman spectrometry. The formation of pores was confirmed by TEM, which revealed the membrane rupture along with the formation of precipitates in the membrane and the cell volume, and by photolumi...
Inscription of embedded photoluminescent microbits inside micromechanically positioned bulk natural diamond, LiF and CaF 2 crystals was performed in sub-filamentation (geometrical focusing) regime by 525 nm 0.2 ps laser pulses focused by 0.65 NA micro-objective as a function of pulse energy, exposure and inter-layer separation. The resulting microb...
Abstract: Chalcogenide vitreous semiconductors (ChVSs) find application in rewritable optical memory storage and optically switchable infrared photonic devices due to the possibility of fast and reversible phase transitions, as well as high refractive index and transmission in the near-and mid-infrared spectral range. Formed on such materials, lase...
The processes of laser dispersion of materials for high-performance generation of colloidal nanoparticles in liquids have been considered. Various laser and material parameters affecting this process have been studied. Efficiencies and ergonomics of the generation of colloidal nanoparticles with the help of laser systems having nano-, pico-, and fe...
The absorption of light in the near-infrared region of the electromagnetic spectrum by Au-hyperdoped Si has been observed. While silicon photodetectors in this range are currently being produced , their efficiency is low. Here, using the nanosecond and picosecond laser hyperdoping of thin amorphous Si films, their compositional (energy-dispersion X...
In the present study, copper and silver nanoparticles with a concentration of 20 µg/cm 2 were synthesized using the method of laser-induced forward transfer (LIFT). The antibacterial activity of the nanoparticles was tested against bacterial biofilms that are common in nature, formed by several types of microorganisms (mixed-species bacteria biofil...
Comparative analysis of different laser regimes of silver nanoparticle generation in water was performed for laser pulsewidth in the range of 300 fs-100 ns. Optical spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy and method of dynamic light scattering were used for nanoparticle characterization. Different laser regi...
In synthetic diamond plates, the intrapulse-correlated dynamics of self-phase modulation and spontaneous nonresonant Raman scattering by center-zone optical phonons were for the first time directly investigated for tightly focused (focusing numerical aperture NA = 0.25) positively chirped visible-range high-intensity laser pulses with variable dura...
