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  1. Article ; Online: Polariton polarization rectifier.

    Sedov, Evgeny S / Rubo, Yuri G / Kavokin, Alexey V

    Light, science & applications

    2019  Volume 8, Page(s) 79

    Abstract: We propose a novel photonic device, the polariton polarization rectifier, intended to transform polariton pulses with arbitrary polarization into linearly polarized pulses with controllable orientation of the polarization plane. It is based on the ... ...

    Abstract We propose a novel photonic device, the polariton polarization rectifier, intended to transform polariton pulses with arbitrary polarization into linearly polarized pulses with controllable orientation of the polarization plane. It is based on the interplay between the orbital motion of the polariton wave packet and the dynamics of the polariton pseudospin governed by the spatially dependent effective magnetic field. The latter is controlled by the TE-TM splitting in a harmonic trap. We show that the unpolarized polariton pulse acquires linear polarization in the course of propagation in a harmonic trap. This gives the considered structure an extra function as a linear polarizer of polariton pulses.
    Language English
    Publishing date 2019-08-28
    Publishing country England
    Document type Journal Article
    ZDB-ID 2662628-7
    ISSN 2047-7538 ; 2047-7538
    ISSN (online) 2047-7538
    ISSN 2047-7538
    DOI 10.1038/s41377-019-0189-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Chiral condensates in a polariton hexagonal ring.

    Ma, Xuekai / Kartashov, Yaroslav V / Kavokin, Alexey / Schumacher, Stefan

    Optics letters

    2020  Volume 45, Issue 20, Page(s) 5700–5703

    Abstract: We model the generation of vortex modes in exciton-polariton condensates in semiconductor micropillars, arranged into a hexagonal ring molecule, in the presence of TE-TM splitting. This splitting lifts the degeneracy of azimuthally modulated vortex modes ...

    Abstract We model the generation of vortex modes in exciton-polariton condensates in semiconductor micropillars, arranged into a hexagonal ring molecule, in the presence of TE-TM splitting. This splitting lifts the degeneracy of azimuthally modulated vortex modes with opposite topological charges supported by this structure, so that a number of non-degenerate vortex states characterized by different combinations of topological charges in two polarization components appears. We present a full bifurcation picture for such vortex modes and show that because they have different energies they can be selectively excited by coherent pump beams with specific frequencies and spatial configurations. At high pumping intensity, polariton-polariton interactions give rise to the coupling of different vortex resonances and a bistable regime is achieved.
    Language English
    Publishing date 2020-10-13
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.405400
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Nanocomposite Metamaterials Based on Self-assembled Titanium Dioxide Rolls with Embedded Gold Nanoparticles.

    Kutrovskaya, Stella / Kucherik, Alexey / Osipov, Anton / Samyshkin, Vlad / Istratov, Alexander / Kavokin, Alexey V

    Scientific reports

    2019  Volume 9, Issue 1, Page(s) 7023

    Abstract: An experimental method for fabrication of a nanocomposite metamaterial based on a self-assembly of titanium dioxide microtubes with encapsulated gold nanoparticles (NPs) is proposed. The formation of microtubes is induced by laser irradiation in the ... ...

    Abstract An experimental method for fabrication of a nanocomposite metamaterial based on a self-assembly of titanium dioxide microtubes with encapsulated gold nanoparticles (NPs) is proposed. The formation of microtubes is induced by laser irradiation in the presence of an external magnetic field. It is shown that the variation of the metal NP concentration leads to the increase of the optical absorption of the metamaterial. The possibility of using arrays of oriented microtubes as absorbing n-doped layers for solar cells is demonstrated.
    Language English
    Publishing date 2019-05-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-019-43588-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Steady state oscillations of circular currents in concentric polariton condensates.

    Lukoshkin, Vladimir / Sedov, Evgeny / Kalevich, Vladimir / Hatzopoulos, Z / Savvidis, P G / Kavokin, Alexey

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 4607

    Abstract: Concentric ring exciton polariton condensates emerging under non-resonant laser pump in an annular trapping potential support persistent circular currents of polaritons. The trapping potential is formed by a cylindrical micropillar etched in a ... ...

    Abstract Concentric ring exciton polariton condensates emerging under non-resonant laser pump in an annular trapping potential support persistent circular currents of polaritons. The trapping potential is formed by a cylindrical micropillar etched in a semiconductor microcavity with embedded quantum wells and a repulsive cloud of optically excited excitons under the pump spot. The symmetry of the potential is subject to external control via manipulation by its pump-induced component. In the manuscript, we demonstrate excitation of concentric ring polariton current states with predetermined vorticity which we trace using interferometry measurements with a spherical reference wave. We also observe the polariton condensate dynamically changing its vorticity during observation, which results in pairs of fork-like dislocations on the time-averaged interferogram coexisting with azimuthally homogeneous photoluminescence distribution in the micropillar.
    Language English
    Publishing date 2023-03-21
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-31520-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Nanocomposite Metamaterials Based on Self-assembled Titanium Dioxide Rolls with Embedded Gold Nanoparticles

    Stella Kutrovskaya / Alexey Kucherik / Anton Osipov / Vlad Samyshkin / Alexander Istratov / Alexey V. Kavokin

    Scientific Reports, Vol 9, Iss 1, Pp 1-

    2019  Volume 7

    Abstract: Abstract An experimental method for fabrication of a nanocomposite metamaterial based on a self-assembly of titanium dioxide microtubes with encapsulated gold nanoparticles (NPs) is proposed. The formation of microtubes is induced by laser irradiation in ...

    Abstract Abstract An experimental method for fabrication of a nanocomposite metamaterial based on a self-assembly of titanium dioxide microtubes with encapsulated gold nanoparticles (NPs) is proposed. The formation of microtubes is induced by laser irradiation in the presence of an external magnetic field. It is shown that the variation of the metal NP concentration leads to the increase of the optical absorption of the metamaterial. The possibility of using arrays of oriented microtubes as absorbing n-doped layers for solar cells is demonstrated.
    Keywords Medicine ; R ; Science ; Q
    Language English
    Publishing date 2019-05-01T00:00:00Z
    Publisher Nature Publishing Group
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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  6. Article ; Online: Interplay of Phonon and Exciton-Mediated Superconductivity in Hybrid Semiconductor-Superconductor Structures.

    Skopelitis, Petros / Cherotchenko, Evgenia D / Kavokin, Alexey V / Posazhennikova, Anna

    Physical review letters

    2018  Volume 120, Issue 10, Page(s) 107001

    Abstract: We predict a strong enhancement of the critical temperature in a conventional Bardeen-Cooper-Schrieffer (BCS) superconductor in the presence of a bosonic condensate of exciton polaritons. The effect depends strongly on the ratio of the cutoff frequencies ...

    Abstract We predict a strong enhancement of the critical temperature in a conventional Bardeen-Cooper-Schrieffer (BCS) superconductor in the presence of a bosonic condensate of exciton polaritons. The effect depends strongly on the ratio of the cutoff frequencies for phonon and exciton-polariton mediated BCS superconductivity, respectively. We also discuss a possible design of hybrid semiconductor-superconductor structures suitable for the experimental observation of such an effect.
    Language English
    Publishing date 2018-03-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.120.107001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 4' 58/153: Show issues

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  7. Article ; Online: Tuning the chemiluminescence of a luminol flow using plasmonic nanoparticles.

    Karabchevsky, Alina / Mosayyebi, Ali / Kavokin, Alexey V

    Light, science & applications

    2016  Volume 5, Issue 11, Page(s) e16164

    Abstract: We have discovered a strong increase in the intensity of the chemiluminescence of a luminol flow and a dramatic modification of its spectral shape in the presence of metallic nanoparticles. We observed that pumping gold and silver nanoparticles into a ... ...

    Abstract We have discovered a strong increase in the intensity of the chemiluminescence of a luminol flow and a dramatic modification of its spectral shape in the presence of metallic nanoparticles. We observed that pumping gold and silver nanoparticles into a microfluidic device fabricated in polydimethylsiloxane prolongs the glow time of luminol. We have demonstrated that the intensity of chemiluminescence in the presence of nanospheres depends on the position along the microfluidic serpentine channel. We show that the enhancement factors can be controlled by the nanoparticle size and material. Spectrally, the emission peak of luminol overlaps with the absorption band of the nanospheres, which maximizes the effect of confined plasmons on the optical density of states in the vicinity of the luminol emission peak. These observations, interpreted in terms of the Purcell effect mediated by nano-plasmons, form an essential step toward the development of microfluidic chips with gain media. Practical implementation of the discovered effect will include improving the detection limits of chemiluminescence for forensic science, research in biology and chemistry, and a number of commercial applications.
    Language English
    Publishing date 2016-11-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 2662628-7
    ISSN 2047-7538 ; 2047-7538
    ISSN (online) 2047-7538
    ISSN 2047-7538
    DOI 10.1038/lsa.2016.164
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Titanium-Based Metasurfaces for Optoelectronics.

    Kavokina, Stella / Samyshkin, Vlad / Cao, Junhui / Abramov, Andrey / Osipov, Anton / Essaka, Samuel Pier / Khalimov, Nazrullo / Bodunov, Dmitry / Kavokin, Alexey

    Nanomaterials (Basel, Switzerland)

    2023  Volume 14, Issue 1

    Abstract: We report on the fabrication method that enables the development of transparent conductive metasurfaces capable of the resonant absorption of light in specific frequency bands. The approach is based on embedding linear sp-carbon chains and metallic ... ...

    Abstract We report on the fabrication method that enables the development of transparent conductive metasurfaces capable of the resonant absorption of light in specific frequency bands. The approach is based on embedding linear sp-carbon chains and metallic nanoparticles in a porous matrix of titanium dioxide (TiO
    Language English
    Publishing date 2023-12-25
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662255-5
    ISSN 2079-4991
    ISSN 2079-4991
    DOI 10.3390/nano14010056
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Book: Microcavities

    Kavokin, Alexey V

    (Oxford science publications ; Series on semiconductor science and technology ; 16)

    2011  

    Author's details Alexey V. Kavokin
    Series title Oxford science publications
    Series on semiconductor science and technology ; 16
    Keywords Electromagnetic interactions ; Lasers ; Quantum electrodynamics ; Semiconductors
    Language English
    Size XX, 467 S., Ill., graph. Darst., 24 cm
    Edition Rev. ed.
    Publisher Oxford Univ. Press
    Publishing place Oxford u.a.
    Document type Book
    Note Literaturverz. S. 445 - 464
    ISBN 9780199228942 ; 9780199602278 ; 0199228949 ; 0199602271
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  10. Article: Publisher Correction: Bosonic condensation of exciton-polaritons in an atomically thin crystal.

    Anton-Solanas, Carlos / Waldherr, Maximilian / Klaas, Martin / Suchomel, Holger / Harder, Tristan H / Cai, Hui / Sedov, Evgeny / Klembt, Sebastian / Kavokin, Alexey V / Tongay, Sefaattin / Watanabe, Kenji / Taniguchi, Takashi / Höfling, Sven / Schneider, Christian

    Nature materials

    2021  Volume 20, Issue 9, Page(s) 1302

    Language English
    Publishing date 2021-05-14
    Publishing country England
    Document type Published Erratum
    ZDB-ID 2088679-2
    ISSN 1476-4660 ; 1476-1122
    ISSN (online) 1476-4660
    ISSN 1476-1122
    DOI 10.1038/s41563-021-01036-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

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