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Dr. Oleksandr Buchnev

Project
Active metafilms loaded with liquid crystals

Short CV
Dr. Oleksandr Buchnev is currently a Senior Research Fellow in the Optoelectronics Research Centre at the University of Southampton. He was awarded an MSc with honours in 1999 from Zhytomyr State University (Zhytomyr, Ukraine) in Physics and joined the Physics department as a tutor assistant at this University. His PhD in Soft Matter Physics was received from the Institute of Physics in Kiev, National Academy of Sciences of Ukraine in 2007. Oleksandr has more than 10 years of research experience working in the field of liquid crystals and display applications. He has relevant expertise in tailor-made liquid crystal devices and in functionalising liquid crystals with nanoparticles, such as ferroelectric, ferromagnetic and plasmonic inclusions. His expertise also includes optics and electro-optics of liquid crystals, and liquid crystal displays; light-induced effects in liquid crystals; and heterogeneous liquid crystal systems (e.g. PDLCs and filled nematics). During his numerous secondments Dr. Buchnev has worked in the research labs and cleanrooms of LG-Phillips, Hoseo University (South Korea), the University of Colorado (Colorado Springs, USA), the University of Rome "Roma Tre" (Rome, Italy) and the Liquid Crystal Institute (Ohio, USA). He is currently involved in a project devoted to the development of liquid-crystal-loaded active photonic metamaterials.

Articles since 2013

  1. Near-field mapping of the edgemode of a topological valley slab waveguide at λ = 1.55 μm
    A. M. Dubrovkin , U. Chattopadhyay, B. Qiang, O. Buchnev, Q. J. Wang , Y.Chong, and N. I. Zheludev
    Appl. Phys. Lett. 116, 191105 (2020) doi: 10.1063/5.0004390 - pdf
  2. Observing and controlling a Tamm plasmon at the interface with a metasurface
    O. Buchnev, A. Belosludtsev, V. Reshetnyak, D. R. Evan and V. A. Fedotov
    Nanophotonics 9, 897–903 (2020) doi: 10.1515/nanoph-2019-0514 - pdf
  3. Discriminating between Coherent and Incoherent Light with Planar Metamaterials
    T. Frank, O. Buchnev, T. Cookson, M. Kaczmarek, P. Lagoudakis and V. A. Fedotov
    Nano Lett. 19 (10), 6869-6875 (2019) doi: 10.1021/acs.nanolett.9b02094 - pdf

  4. Liquid crystal-filled meta-pixel with switchable asymmetric reflectance and transmittance
    O. Buchnev, N. Podoliak, and V. A. Fedotov
    J. Mol. Liq. 0167-7322 (2017) doi: 10.1016/j.molliq.2017.12.118
  5. Controlling stiction in nano-electro-mechanical systems using liquid crystals
    O. Buchnev, N. Podoliak, T. Frank, M. Kaczmarek, L. Jiang, and V. A. Fedotov
    ACS Nano 10, 11519–11524 (2016) doi: 10.1021/acsnano.6b07495 - pdf
  6. Phase-front curvature effects on nematicon generation
    N. Karimi, A. Alberucci, O. Buchnev, M. Virkki, M. Kauranen, and G. Assanto
    J. Opt. Soc. Am. 33(5), 903-909, (2016) doi: 10.1364/JOSAB.33.000903
  7. Voltage driven beam bistability in a reorientational uniaxial dielectric
    A. Piccardi, N. Kravets, A. Alberucci, O. Buchnev, and G. Assanto
    APL Photonics 1, 011302 (2016) doi: 10.1063/1.4945349 - pdf
  8. Observation of Beam Self-Induced Transition from Positive to Negative Optical Refraction in Nematic Liquid Crystals
    N. Kravets, A. Piccardi, A. Alberucci, O. Buchnev, and G. Assanto
    Mol. Cryst. Liq. Cryst. 619, 28-34 (2015) doi: 10.1080/15421406.2015.1088761
  9. Soliton enhancement of spontaneous symmetry breaking
    A. Alberucci, A. Piccardi, N. Kravets, O. Buchnev, and G. Assanto
    Optica 2(9), 783-789 (2015) doi: 10.1364/OPTICA.2.000783 - pdf
  10. Electrically controlled nanostructured metasurface loaded with liquid crystal: toward multifunctional photonic switch
    O. Buchnev , N. Podoliak , M. Kaczmarek , N. I. Zheludev, and V. A. Fedotov
    Adv. Opt. Mater. 3, 674–679 (2015) doi: 10.1002/adom.201400494 - pdf
  11. Bistability with optical beams propagating in a reorientational medium
    N. Kravets, A. Piccardi, A. Alberucci, O. Buchnev, M. Kaczmarek, and G. Assanto
    Phys. Rev. Lett. 113, 023901 (2014) doi: 10.1103/PhysRevLett.113.023901 - pdf
  12. Power-controlled transition from standard to negative refraction in reorientational soft matter
    A. Piccardi, A. Alberucci, N. Kravets, O. Buchnev and G. Assanto
    Nat. Commun. 5, 5533 (2014) doi: 10.1038/ncomms6533 - free access
  13. Voltage transfer function as an optical method to characterize electrical properties of liquid crystal devices
    J. Bateman, M. Proctor, O. Buchnev, N. Podoliak, G. D’Alessandro, and M. Kaczmarek
    Opt. Lett. 39, 3756 (2014) doi: 10.1364/OL.39.003756
  14. Controlling intensity and phase of terahertz radiation with an optically thin liquid crystal-loaded metamaterial
    O. Buchnev, J. Wallauer, M. Walther, M. Kaczmarek, N. I. Zheludev, V. A. Fedotov
    Appl. Phys. Lett. 103, 141904 (2013) doi: 10.1063/1.4823822 - pdf
  15. Electro-optical control in a plasmonic metamaterial hybridised with a liquid-crystal cell
    O. Buchnev, J. Y. Ou, M. Kaczmarek, N. I. Zheludev, and V. A. Fedotov
    Opt. Express 21(2), 1633 (2013) doi: 10.1364/OE.21.001633 - pdf

Conference Contributions since 2013

  1. (invited) Metamaterials and topological non-separable light pulses
    N. Papasimakis, A. Zdagkas, Y. Hou, O. Buchnev, and N. I. Zheludev
    SPIE Optics & Photonics 2020, San Diego, CA, USA, 23 - 27 Aug 2020
  2. Generation of Topological Space-Time Non-Separable Light Pulses
    A. Zdagkas, Y. Hou, V. Savinov, H. Zhang, O. Buchnev, N.Papasimakis and N. I. Zheludev
    CLEO 2020 Virtual Conference, 11-15 May 2020
  3. Detecting spatial coherence of light with planar metallic metamaterials
    T. Frank, O. Buchnev, T. Cookson, M. Kaczmarek, P. Lagoudakis, and V. A. Fedotov
    ICEAA-IEEE APWC 2019, Granada, Spain, 9 - 13 Sep 2019
  4. (invited) Ultra-Thin Metamaterial-Enhanced Liquid-Crystal Terahertz Spatial Phase Modulator
    O. Buchnev, N. Podoliak, K. Kaltenecker, M. Walther, M. Kaczmarek and V. A. Fedotov
    SPIE Optics & Photonics 2019, San Diego, CA, USA, 11 - 15 Aug 2019
  5. Sensing Spatial Coherence of Light with Metasurfaces
    T. Frank, O. Buchnev, T. Cookson, M. Kaczmarek, P. Lagoudakis and V. A. Fedotov
    SPIE Optics & Photonics 2019, San Diego, CA, USA, 11 - 15 Aug 2019
  6. (invited) Sensing spatial coherence of light with planar metamaterials
    T. Frank, O. Buchnev, T. Cookson, M. Kaczmarek, P. Lagoudakis and V. A. Fedotov
    Metanano 2019, St. Petersburg, Russia, 15-19 July 2019
  7. (invited) Radiation (-less) sources beyond common multipoles
    V. A. Fedotov
    Metanano 2019, St. Petersburg, Russia, 15-19 July 2019
  8. (invited) Controlling Nanoscale Motion and Deformations in Nano-Electro-Mechanical Systems with Nematic Liquid Crystals
    O. Buchnev, N. Podoliak, M. Kaczmarek, L. Jiang, V. A. Fedotov
    15th European Conference on Liquid Crystals, Wrocław, Poland June 30 - July 5, 2019
  9. (invited) Sensing Spatial Coherence of Light with Metasurface
    T. Frank, O. Buchnev, T. Cookson, M. Kaczmarek, P. Lagoudakis and V. A. Fedotov
    Photonics & Electromagnetics Research Symposium, PIERS 2019 in Rome, Italy, 17-20 June, 2019
  10. (invited) Metamaterial-Liquid Crystal Ultra-Thin Spatial Phase Modulator for THz Applications
    O. Buchnev, N. Podoliak, K. Kaltenecker, M. Walther, M. Kaczmarek, V. A. Fedotov
    Photonics & Electromagnetics Research Symposium, PIERS 2019 in Rome, Italy, 17-20 June, 2019
  11. (invited) Photonic Metamaterials Mechanically Re-configurable at Nanoscale via Liquid Crystals
    O. Buchnev, N. Podoliak, M. Kaczmarek, L. Jiang, V. A. Fedotov
    Photonics & Electromagnetics Research Symposium, PIERS 2019 in Rome, Italy, 17-20 June, 2019
  12. Generation of electromagnetic doughnut pulses with a singular metamaterial converter
    A. Zdagkas, N. Papasimakis, V. Nalla, H. Zhang, O. Buchnev, and N. I. Zheludev
    Nanometa 2019, Seefeld, Austria, 3 - 6 Jan 2019
  13. (invited) Re-configurable photonic metamaterials elastically coupled with liquid crystals at nanoscale
    O. Buchnev, N. Podoliak, M. Kaczmarek, and V. A. Fedotov
    7th Workshop on Liquid Crystals for Photonics (WLCP 2018), Jastrzębia Góra, Poland, 17 – 21 Sept 2018
  14. Metamaterial-Enhanced thin liquid-crystal cell as a spatial phase modulator for THz applications
    O. Buchnev, N. Podoliak, K. Kaltenecker, M. Walther, M. Kaczmarek, and V. A. Fedotov
    7th Workshop on Liquid Crystals for Photonics (WLCP 2018), Jastrzębia Góra, Poland, 17 – 21 Sept 2018
  15. Detecting coherence of light with metasurfaces
    T. Frank, O. Buchnev, T. Cookson, M. Kaczmarek, P. Lagoudakis, and V. A. Fedotov
    Metamaterials 2018, Finland, 27 Aug – 1 Sept 2018
  16. Launching electromagnetic donuts: Non-transverse electromagnetic pulses
    A. Zdagkas, P. Moitra, O. Buchnev, N. Papasimakis, and N. I. Zheludev
    CLEO 2018, San Jose, CA, USA, 13-18 May 2018
  17. (invited) Hybrid photonic metamaterials coupled with liquid crystals at nanoscale
    O. Buchnev, N. Podoliak, M. Kaczmarek, and V. A. Fedotov.
    Conference on Photonic and Optoelectronic Materials, Exeter, UK, 9-10 Apr 2018
  18. (keynote) Multi-functional and photoaddressable hybrid liquid crystals
    M. Kaczmarek, M. Proctor, E. Mavrona, G. D’Alessandro, V. Fedotov, O. Buchnev, L. De Sio and N. Tabiryan
    International Conference on Optics, Photonics and Materials, Nice, France, 26-28 Oct 2016
  19. Tuneable liquid crystal-metamaterial hybrids with elasto-mechanical coupling
    O. Buchnev, T. Frank, N. Podoliak, M. Kaczmarek, L. Jiang, and V. A. Fedotov
    Metamaterials 2016, Crete, Greece, 17 - 22 Sep 2016
  20. Novel liquid crystal-metamaterial hybrids with elasto-mechanical coupling
    O. Buchnev, T. Frank, M. Kaczmarek, and V. A. Fedotov
    26th International Liquid Crystal Conference (ILCC'16), Kent, OH, USA, 31 Jul - 5 Aug 2016
  21. (invited) Exploiting the full potential of liquid crystals in tuneable and re-configurable metamaterials
    O. Buchnev, T. Frank, N. Podoliak, M. Kaczmarek, L. Jiang, and V. A. Fedotov
    International Conference on Optical, Optoelectronic and Photonic Materials and Applications 2016 (ICOOPMA'16), Montreal, Canada, 13-17 June 2016
  22. (invited) Unlocking the potential of liquid crystals as a functional component of active metamaterials
    V. A. Fedotov, O. Buchnev, N. Podoliak, N. I. Zheludev, M. Kaczmarek, J. Wallauer and M. Walther
    PIERS 2015, Prague, Czech Republic, 6 - 9 Jul 2015
  23. Tunable liquid crystal-based metamaterials for photonic applications
    O. Buchnev, N. Podoliak, M. Kaczmarek, N. I. Zheludev and V. A. Fedotov
    25th International Liquid Crystal Conference 2014, Dublin, Ireland, 29 Jun - 04 Jul 2014
  24. Tunable liquid crystal-loaded metasurfaces for IR and THz applications
    O. Buchnev, J. Wallauer, M. Walther, N. Podoliak, M. Kaczmarek, N. I. Zheludev and V. A. Fedotov
    CLEO:2014, San Jose, CA, USA, 8 - 13 Jun 2014
  25. (invited) Active liquid crystal-loaded metasurfaces for photonic applications
    O. Buchnev
    META'14, Singapore, 20 - 23 May 2014
  26. Active liquid crystal-loaded metasurfaces for THz and IR applications
    O. Buchnev, J. Wallauer, M. Walther, N. Podoliak, M. Kaczmarek, N. I. Zheludev, and V. A. Fedotov
    SPIE Photonics Europe, Brussels, Belgium, 14 - 17 Apr 2014
  27. (invited) Liquid crystal metamaterials for THz and IR applications
    O. Buchnev, J. Wallauer, M. Walther, N. Podoliak, M. Kaczmarek, N. I. Zheludev and V. A. Fedotov
    Workshop on Soft Matter: Analysis, Applications and Challenges, Daejeon, Korea, 18 - 21 Mar 2014
  28. Electrically controlled liquid crystal plasmonic metamaterials
    O. Buchnev, J. Y. Ou, M. Kaczmarek, N. I. Zheludev, and V. A. Fedotov
    Optics of Liquid Crystals 2013, Honolulu, Hawaii, 29 Sep - 4 Oct 2013
  29. Switching near-IR metamaterial response with electrically-controlled liquid crystals
    O. Buchnev, J. Y. Ou, M. Kaczmarek, N. I. Zheludev, and V. A. Fedotov
    Conference on Liquid Crystals ECLC-2013, Rhodes, Greece, 22 - 27 Sep 2013
  30. Electrically tunable liquid crystal plasmonic metamaterials
    O. Buchnev, J. Y. Ou, M. Kaczmarek, N. I. Zheludev, and V. A. Fedotov
    Metamaterials' 2013, Bordeaux, France, 16 - 19 Sep 2013
  31. Electrically controlled liquid crystal plasmonic metamaterials
    O. Buchnev, J. Y. Ou, M. Kaczmarek, N.I. Zheludev, and V. A. Fedotov
    CLEO/Europe - IQEC 2013, Munich, Germany, 12 - 16 May 2013
  32. (poster) Electrically controlled liquid-crystal cell enhanced with plasmonic metamaterial
    O. Buchnev, J. Y. Ou, M. Kaczmarek, N. I. Zheludev, V. A. Fedotov
    Nanometa 2013, Seefeld, Austria, 3 - 6 Jan 2013

 

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