Dr. Dmitrii S. Dovzhenko Profile

Dr. Dmitrii S. Dovzhenko

Research Scientist at Univ of Southampton

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Publications (5)

Proceedings Article | 5 March 2021 Presentation + Paper

Cavity-enhanced photoluminescence of semiconductor quantum dot thin films under two-photon excitation

Victor Krivenkov, Dmitriy Dovzhenko, Irina Kriukova, Pavel Samokhvalov, Ana Saanchez-Iglesias, Marek Grzelczak, Igor Nabiev, Yury Rakovich

Proceedings Volume 11694, 116940W (2021) https://doi.org/10.1117/12.2586494

KEYWORDS: Thin films, Semiconductors, Quantum dots, Photonic crystals, Luminescence, Plasmons, Quantum efficiency, Optoelectronics, Nanoparticles, Biosensing

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Proceedings Article | 3 October 2019 Paper

Polariton-assisted emission of strongly coupled organic dye excitons in a tunable optical microcavity

Dmitriy Dovzhenko, Konstantin Mochalov, Ivan Vaskan, Irina Kryukova, Yury Rakovich, Igor Nabiev

Proceedings Volume 11207, 112072C (2019) https://doi.org/10.1117/12.2530257

KEYWORDS: Optical microcavities, Mirrors, Molecules, Excitons, Polaritons, Plasmonics, Luminescence, Electromagnetism, Physics, Fabry–Perot interferometers

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Proceedings Article | 12 May 2016 Paper

A new approach for detection of explosives based on ion mobility spectrometry and laser desorption/ionization on porous silicon

Yury Kuzishchin, Gennadii Kotkovskii, Igor Martynov, Dmitriy Dovzhenko, Alexander Chistyakov

Proceedings Volume 9824, 98241A (2016) https://doi.org/10.1117/12.2224243

KEYWORDS: Silicon, Semiconductor lasers, Explosives detection, Explosives, Spectroscopy, Molecules, Ionization, Ions, Molecular lasers, Laser irradiation

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Proceedings Article | 18 April 2016 Presentation + Paper

Modulation of quantum dot photoluminescence in porous silicon photonic crystals as a function of the depth of their penetration

Dmitriy Dovzhenko, Igor Martynov, Pavel Samokhvalov, Konstantin Mochalov, Alexander Chistyakov, Igor Nabiev

Proceedings Volume 9885, 988507 (2016) https://doi.org/10.1117/12.2228990

KEYWORDS: Photonic crystals, Luminescence, Silicon photonics, Crystals, Optical microcavities, Silicon, Nanoparticles, Photonic crystal devices, Modulation, Quantum dots, Silicon, Silicon photonics, Crystals, Finite-difference time-domain method, Etching

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Photonic crystals doped with fluorescent nanoparticles offer a plenty of interesting applications in photonics, laser physics, and biosensing. Understanding of the mechanisms and effects of modulation of the photoluminescent properties of photonic crystals by varying the depth of nanoparticle penetration should promote targeted development of nanocrystal-doped photonic crystals with desired optical and morphological properties. Here, we have investigated the penetration of semiconductor quantum dots (QDs) into porous silicon photonic crystals and performed experimental analysis and theoretical modeling of the effects of the depth of nanoparticle penetration on the photoluminescent properties of this photonic system. For this purpose, we fabricated porous silicon microcavities with an eigenmode width not exceeding 10 nm at a wavelength of 620 nm. CdSe/CdS/ZnS QDs fluorescing at 617 nm with a quantum yield of about 70% and a width at half-height of about 40 nm were used in the study. Confocal microscopy and scanning electron microscopy were used to estimate the depth of penetration of QDs into the porous silicon structure; the photoluminescence spectra, kinetics, and angular fluorescence distribution were also analyzed. Enhancement of QD photoluminescence at the microcavity eigenmode wavelength was observed. Theoretical modeling of porous silicon photonic crystals doped with QDs was performed using the finite-difference time-domain (FDTD) approach. Theoretical modeling has predicted, and the experiments have confirmed, that even a very limited depth of nanoparticle penetration into photonic crystals, not exceeding the first Bragg mirror of the microcavity, leads to significant changes in the QD luminescence spectrum determined by the modulation of the local density of photonic states in the microcavity. At the same time, complete and uniform filling of a photonic crystal with nanoparticles does not enhance this effect, which is as strong as in the case of a very limited depth of nanoparticle penetration. Our results will help to choose the best technology for fabrication of efficient sensor systems based on porous silicon photonic crystals doped with fluorescent nanoparticles.

Proceedings Article | 2 May 2014 Paper

Photoluminescence of CdSe/ZnS quantum dots in a porous silicon microcavity

Dmitriy Dovzhenko, Igor Martynov, Pavel Samokhvalov, Igor Eremin, Gennadii Kotkovskii, Igor Sipailo, Alexander Chistyakov

Proceedings Volume 9126, 91263O (2014) https://doi.org/10.1117/12.2057922

KEYWORDS: Luminescence, Silicon, Optical microcavities, Quantum dots, Photonic crystals, Mirrors, Absorbance, Oxides, Reflection, Oxidation

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