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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
- 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
- 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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
- 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 - (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 - 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 - (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 - (invited) Radiation (-less) sources beyond common multipoles
V. A. Fedotov
Metanano 2019, St. Petersburg, Russia, 15-19 July 2019 - (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 - (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 - (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 - (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 - 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 - (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 - 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 - 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 - 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 - (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 - (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 - 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 - 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 - (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 - (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 - 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 - 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 - (invited) Active liquid crystal-loaded metasurfaces for photonic applications
O. Buchnev
META'14, Singapore, 20 - 23 May 2014 - 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 - (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 - 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 - 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 - 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 - 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 - (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