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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. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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. 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
  2. (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
  3. 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
  4. 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
  5. 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
  6. (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
  7. (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
  8. 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
  9. 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
  10. (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
  11. (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
  12. 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
  13. 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
  14. (invited) Active liquid crystal-loaded metasurfaces for photonic applications
    O. Buchnev
    META'14, Singapore, 20 - 23 May 2014
  15. 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
  16. (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
  17. 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
  18. 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
  19. 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
  20. 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
  21. (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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