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Three-dimensional model of quantum dots' self-assembly under the laser field action / V. A. Tkachenko [и др.] // Информационные технологии и нанотехнологии (ИТНТ-2017) : сб трудов. - Самара, 2017. - Ст. 100-103
Аннотация: This study considers the self-assembly process of quantum dots to nanostructures with the predefined geometry, which proceeds in the external resonant laser field within the three-dimensional model of Brownian dynamics. Average aggregation time of nanoparticles depending on the external field wavelength was calculated. The probability of such structures formation was estimated for the calculated average aggregation time and for the pulse duration of the laser used in the experiment

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Доп.точки доступа:
Tkachenko, V. A.; Tsipotan, A. S.; Aleksandrovskiy, A. S.; Александровский, Александр Сергеевич; Slabko, V. V.; Слабко, Виталий Васильевич; "Информационные технологии и нанотехнологии", Международная конференция и молодежная школа(3 ; 2017 ; апр. ; 25-27 ; Самара); Самарский национальный исследовательский университет им. акад. С.П. Королева; Институт систем обработки изображений РАН
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Three-dimensional model of quantum dots'' self-assembly under the action of laser radiation / V. A. Tkachenko [et al.] // Комп. оптика. - 2017. - Т. 41, № 4. - С. 577-580, DOI 10.18287/2412-6179-2017-41-4-577-580. - Библиогр.: 14. - The work was funded by the Russian Foundation for Basic Research (RFBR) and Krasnoyarsk Krai administration under research project No. 16-42-240410r_a, RFBR research project No. 16-32-00129 and by the Ministry of Education and Science of the Russian Federation (Grant 3.6341.2017/VU). . - ISSN 0134-2452
Кл.слова (ненормированные):
Nanostructure fabrication -- Plasmonics -- Optical tweezers or optical manipulation
Аннотация: This study considered a process of quantum dots' self-assembly into nanostructure arrays with predefined geometry, which proceeds in the external resonant laser field. We considered the simplest case of assembling a stable structure of two particles. The problem was solved numerically using a three-dimensional model of Brownian dynamics. The idea of the method is that the attraction of the dots occurs due to the interaction of resonantly induced dipole moments, with the dots being then captured by the Van der Waals force. Finally, a three-dimensional model was considered; the average nanoparticle aggregation time as a function of the laser radiation wavelength was calculated; the probability of such structures' being formed was estimated for the calculated average aggregation time and for the laser pulse duration used in the experiment. The wavelength of the maximum probability was found to be shifted from the single particle resonance wavelength of 525 nm to the red area of 535 nm, which is in qualitative agreement with the redshift of the resonance wavelength of interacting particles.

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Держатели документа:
Kirensky Institute of Physics, Russian Academy of Sciences
Siberian Federal University

Доп.точки доступа:
Tkachenko, V. A.; Tsipotan, A. S.; Slabko, V. V.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич
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    Laser-induced interaction of multilevel quantum dots / А. А. Glushkov [et al.] // J. Sib. Fed. Univ. Math. Phys. - 2017. - Vol. 10, Is. 1. - P. 108-116 ; Журн. СФУ. Сер. "Математика и физика", DOI 10.17516/1997-1397-2017-10-1-108-116. - Cited References: 26 . - ISSN 1997-1397
   Перевод заглавия: Влияние многоуровнего характера спектра квантовых точек на энергию их взаимодействия в поле лазерного излучения
Аннотация: A theoretical model is developed for describing the laser-induced interaction of a pair of multilevel semi- conductor quantum dots. Spectral dependencies of interaction energy are calculated in dipole-dipole ap- proximation for a pair of CdSe quantum dots in a quasi-resonant laser field, for cases of two identical quantum dots and those with differing transition wavelengths. Interaction energy of pair of multilevel quantum dots in the long-wavelength potential well is much higher than that of pair of two-level quan- tum dots. The increase of difference of resonance wavelengths of two interacting quantum dots leads to decrease of the potential well depth
В диполь-дипольном приближении произведен расчет энергетических спектров взаимодействия пары наночастиц CdSe в квазирезонансном лазерном поле для случаев двух одинаковых частиц и частиц с отличающимися длинами волн переходов. Показано, что учет дополнительных пе- реходов значительно увеличивает величину энергии взаимодействия для потенциальной ямы, лежащей в длинноволновой области спектра. На примере двух частиц с ограниченным числом резонансов исследовано влияние разности резонансных длин волн на глубину и положение потен- циальной ямы. Показано, что глубина потенциальной ямы уменьшается при увеличении разнос- ти резонансных длин волн переходов двух частиц

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Держатели документа:
Siberian Federal University

Доп.точки доступа:
Glushkov, А. А.; Slyusareva, E. A.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Tsipotan, A. S.; Slabko, V. V.; Слабко, Виталий Васильевич

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Laser-induced interaction of multilevel quantum dots / А. А. Glushkov [и др.] // ICONO/LAT 2016 : conference program. - 2016. - Ст. IThL7
Аннотация: A theoretical model is developed for describing the laser-induced interaction of multilevel quantum dots(QDs). Spectral dependencies of interaction energy are calculated for QDs pair, for cases of identical QDs and those with differing transition wavelengths

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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Glushkov, А. А.; Глушков А. А.; Tsipotan, A. S. ; Ципотан, Алексей Сергеевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Slabko, V. V.; Слабко, Виталий Васильевич; International Conference on Coherent and Nonlinear Optics(2016 ; Sept. ; 26-30 ; Minsk, Belarus); International Conference on Lasers, Applications, and Technologies(2016 ; Sept. ; 26-30 ; Minsk, Belarus)
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    Effect of visible and UV irradiation on the aggregation stability of CdTe quantum dots / A. S. Tsipotan [et al.] // J. Nanopart. Res. - 2016. - Vol. 18, Is. 11. - P. 324-8, DOI 10.1007/s11051-016-3638-0. - Cited References: 23 . - ISSN 1388-0764
   Перевод заглавия: Влияние видимого и ультрафиолетового излучения на процесс агрегации квантовых точек CdTe
Кл.слова (ненормированные):
Nanotechnology -- Quantum dots -- Photostimulated aggregation -- Photostability -- Colloids -- Laser-induced self-assembly
Аннотация: The possibility of controlling the aggregation stability of CdTe quantum dots (QDs) stabilized by thioglycolic acid (TGA) is important for implementation of quasi-resonant laser-induced self-assembly. This study examines the influence of irradiation by the UV as well as by the visible light on the photostimulated aggregation of QDs. Different photochemical mechanisms are identified, depending on whether light wavelength falls into an interband transition or the first exciton transition. Irradiation by visible light does not lead to changes in the absorption spectra but decreases luminescence intensity through the detachment of TGA and the formation of dangling bonds, leading to the creation of radiativeless relaxation centers. UV irradiation (in the 300–370 nm range), at an intensity of 0.4 W/cm2, initially (during the first 75 min) leads to the degradation of the stabilizer and QDs’ surface. After 75 min of combined UV and visible light irradiation, a gradual increase in spontaneous aggregation takes place, testifying excessive decrease in stabilizing potential barrier height. Hence, the laser-induced self-assembly of CdTe QDs is recommended to be performed over a time period of between 80 and 100 min after the beginning of low-intensity UV irradiation under conditions equivalent to those applied in this study. © 2016, Springer Science+Business Media Dordrecht.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
Russian Academy of Sciences, Kirensky Institute of Physics, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Tsipotan, A. S.; Gerasimova, M. A.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Slabko, V. V.
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Tsipotan, A. S.
Wavelength-controlled manipulation of colloidal quasi-resonant quantum dots under pulsed laser irradiation / A. S. Tsipotan, A. S. Aleksandrovsky, V. V. Slabko // Proc. SPIE : SPIE, 2016. - Vol. 10027: Nanophotonics and Micro/Nano Optics III. - Ст. 1002711, DOI 10.1117/12.2245386. - Cited References: 11. - The reported study was funded by RFBR and Government of Krasnoyarsk Territory according to the research project № 16-42-240410 and particularly supported by the Ministry of Education and Science of the Russian Federation (No. 3.1749.2014/K, 214/71 for Siberian Federal University); by RFBR research project No. 14-02-00219 A, 16-32-00129; by SB RAS Program №II.2P № 0358-2015-0012.
Кл.слова (ненормированные):
Self-assembly -- nanostructures -- quantum dots -- absorption spectra -- dipole-dipole interaction -- laser control
Аннотация: Production of nanostructures consisting of semiconductor nanoparticles (NPs) is of interest for number of applications. Development of new methods of NPs' manipulation and aggregation of NPs into nanostructures with pre-defined geometry is also of considerable interest from the fundamental point of view. Under laser irradiation with properly chosen wavelengths excitonic excitations of semiconductor NPs will be induced. Electrodynamical interaction between excited NPs is rather universal and allows formation of wide variety of nanostructures both of homo- and heterogeneous content. Theoretical approach for study of interaction of NPs' ensembles with laser light includes dipole-dipole approximation for NPs' attraction. Experimental results are obtained for TGA stabilized CdTe QDs with the excitonic resonance at 520 nm. Six different samples of the same colloid solution were irradiated at wavelengths from 540 to 570 nm. Modifications of absorption spectra of solutions after irradiation was detected, being most prominent at 555 and 560 nm irradiation wavelengths. Analysis of spectra shows that up to 47% of QDs were assembled into pairs with 10 nm inter-QD distance. Therefore, possibility of precise QDs manipulation via laser-induced electrodynamical interaction is demonstrated.

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Доп.точки доступа:
Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Slabko, V. V.; Nanophotonics and Micro/Nano Optics(3 ; 2016 ; October 12 ; Beijing, China)
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Enhancing coherent nonlinear-optical coupling in hyperbolic metananowaveguides / A. K. Popov [et al.] // 13th Workshop and Top. Meet. Novel Opt. Materials and Applications : program. - 2017. - Nonlinear Optics. - P.

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Доп.точки доступа:
Popov, A. K.; Slabko, V. V.; Слабко, Виталий Васильевич; Tkachenko, V. A.; Myslivets, S. A.; Мысливец, Сергей Александрович; Novel Optical Materials and Applications, Workshop and Topical Meeting (13 ; 2017 ; 4-10 June ; Cetraro, Italy)
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Shaping light in backward-wave nonlinear hyperbolic metamaterials / A. K. Popov [et al.] // Photonics. - 2018. - Vol. 5, Is. 2. - Ст. 8, DOI 10.3390/photonics5020008. - Cited References: 46. - Alexander K. Popov acknowledges support by the U. S. Army Research Office under grant number W911NF-14-1-0619. Vitaly V. Slabko acknowledges support by the Ministry of Education and Science of the Russian Federation (project # 3.6341.2017/6.7). . - ISSN 2304-6732

РУБ Optics
Рубрики:
NEGATIVE-INDEX METAMATERIALS
OPTICAL PARAMETRIC OSCILLATOR
Кл.слова (ненормированные):
optical metamaterials -- fundamental concepts in photonics -- light-matter -- interactions at the subwavelength and nanoscale -- fundamental -- understanding of linear and nonlinear optical processes in novel metamaterials underpinning photonic devices and components -- advancing the frontier of nanophotonics with the associated nanoscience and nanotechnology -- nanostructures that can serve as building blocks for nano-optical systems -- use of nanotechnology in photonics -- nonlinear nanophotonics -- plasmonics and excitonics -- subwavelength components and negative index materials -- slowing, store, and processing light pulses -- materials for optical sensing, for tunable optical delay lines, for optical buffers, for high extinction optical switches, for novel image processing hardware, and for highly-efficient wavelength converters
Аннотация: Backward electromagnetic waves are extraordinary waves with contra-directed phase velocity and energy flux. Unusual properties of the coherent nonlinear optical coupling of the phase-matched ordinary and backward electromagnetic waves with contra-directed energy fluxes are described that enable greatly-enhanced frequency and propagation direction conversion, parametrical amplification, as well as control of shape of the light pulses. Extraordinary transient processes that emerge in such metamaterials in pulsed regimes are described. The results of the numerical simulation of particular plasmonic metamaterials with hyperbolic dispersion are presented, which prove the possibility to match phases of such coupled guided ordinary and backward electromagnetic waves. Particular properties of the outlined processes in the proposed metamaterial are demonstrated through numerical simulations. Potential applications include ultra-miniature amplifiers, frequency changing reflectors, modulators, pulse shapers, and remotely actuated sensors.

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Держатели документа:
Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA.
Russian Acad Sci, LV Kirensky Inst Phys, Dept Coherent & Nonlinear Opt, Fed Res Ctr,Siberian Branch,Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk 660041, Russia.
Univ Missouri, Off Chancellor, St Louis, MO 63121 USA.

Доп.точки доступа:
Popov, A. K.; Myslivets, S. A.; Мысливец, Сергей Александрович; Slabko, V. V.; Tkachenko, V. A.; George, T. F.; U. S. Army Research Office [W911NF-14-1-0619]; Ministry of Education and Science of the Russian Federation [3.6341.2017/6.7]
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Self-organized aggregation of a triple of resonant nanoparticles into stable structures with various shapes controlled by a laser field / V. S. Kornienko [et al.] // J. Phys. Conf. Ser. - 2018. - Vol. 1092. - Ст. 012153, DOI 10.1088/1742-6596/1092/1/012153. - Cited References: 5. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, and Krasnoyarsk Regional Fund of Science to the research project: «Optical binding as a mechanism for self-assembly of stable complex nanostructures from resonant nanoparticles» (project № 18-42-243008). V.V.S. is grateful for the support from Ministry of Education and Science of the Russian Federation (Grant № 3.6341.2017/6.7).
Кл.слова (ненормированные):
Laser fields -- Quasi-resonant -- Stable structures
Аннотация: The method of formation of nanostructures consisting of three particles in the field of quasiresonant laser radiation is considered. To obtain structures, two approaches were used: a third particle is added to a pre-formed particlespair at a certain angle; the necessary structure is formed from three initially isolated particles. Numerically shown that it is possibleto assemble structures of line and pyramid using both previously mentioned approaches.

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Держатели документа:
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation
Institute of Computational Modeling of SB RAS, 50/44Akademgorodok, Krasnoyarsk, 660036, Russian Federation
L. V. Kirensky Institute of Physics Siberian Branch, Russian Academy of Sciences, 50/43 Akademgorodok Krasnoyarsk660036, Russian Federation

Доп.точки доступа:
Kornienko, V. S.; Tkachenko, V. A.; Tsipotan, A. S.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Slabko, V. V.; International Conference on Metamaterials and Nanophotonics(3rd ; 2018, ; Sept. ; 17-21 ; Sochi, Russian Federation)
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10.

Brownian dynamics of the self-assembly of complex nanostructures in the field of quasi-resonant laser radiation / V. S. Kornienko [et al.] // Photonics Nanostruc. Fundam. Appl. - 2019. - Vol. 35. - Ст. 100707, DOI 10.1016/j.photonics.2019.100707. - Cited References: 32. - The reported study was funded by Russian Science Foundation (Grant 18-72-00003 ). V.V. Slabko is grateful for the support from the Ministry of Education and Science of the Russian Federation (Grant 3.6341.2017/VU ). . - ISSN 1569-4410
Кл.слова (ненормированные):
Dipole-dipole interaction -- Laser field -- Brownian dynamics -- Self-assembly of nanostructures -- Colloidal crystals
Аннотация: Self-assembly of nanoparticles under the action of laser field can be an universal method for the formation of nanostructures with specific properties for application in sensorics and nanophotonics. For prognosis of the self-assembly processes, the model of movement of an ensemble of nanoparticles in a viscous media under the action of laser radiation with the account for interaction of laser-induced polarizations and Brownian dynamics is developed. This model is applied to the investigation of the self-assembly process of a triple of nanoparticles into three-particle structure with a predetermined geometry.Two specific cases of formation of nanostructure from a preliminarily formed pair of particles are studied: either for the pair fixed in space or from the unfixed pair of nanoparticles. The geometry of resulting nanostructures is shown to be determined by the polarization direction of laser radiation and the laser wavelength. Under proper choice of these parameters the formation of structures is shown to be highly efficient. E. g., maximum probability of structures formation is as hig as 36–46% per single laser pulse of 10 ns duration. © 2019 Elsevier B.V.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
Department of Computational Mathematics, Institute of Computational Modeling of Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Laboratory of Coherent Optics, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Kornienko, V. S.; Tsipotan, A. S.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Slabko, V. V.
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