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Oksana Trushkevych

Oksana is a Senior Research Fellow in the Ultrasonics Group. She is an associate fellow of Warwick Institute of Engagement (WIE) and a module leader for The Science of Music interdisciplinary module for Warwick Institute for Advanced Teaching and Learning (IATL).

Her research interests cover ultrasonics, materials characterisation and soft matter. She is focusing on solving industrially relevant problems in non-destructive testing through a variety of methods including novel approaches to thermography, electromagnetic and magnetostrictive acoustic transducers and laser ultrasonics. She is also developing sensitive soft matter - based film sensors for ultrasound visualisation.

Research

Oksana has a broad research experience (CV). The topics she contributed to include:

  • Photonics of liquid crystal based nanocomposite materials
  • Microwave and THz properties of liquid crystals and liquid crystal based nanocomposite materials for device applications
  • Ultrasonic methods for magnetic phase transitions in single crystals
  • Characterisation of single crystal Ge mebmranes using laser interferometry
  • Raman spectroscopy of suspended gprahene membranes, amorphous and diamond-like carbons, optical Raman Tweezing
  • Thermography inspection for additive manufacturing.

Oksana has worked with industrial partners and led a project for a spin-off company Sonemat

Most recent/significant publications

My Google Scholar publications list is here
most recent/significant publications are llisted below:

O. Trushkevych and R. S. Edwards, "Differential coil EMAT for simultaneous detection of in-plane and out-of-plane components of surface acoustic waves," IEEE Sensors Journal 20 (19), 11156-11162 (2020)

RS Edwards, J Ward, LQ Zhou, O.Trushkevych, "The interaction of polymer dispersed liquid crystal sensors with ultrasound", Applied Physics Letters, 116 (4), 044104 (2020)

O. Trushkevych, R.S. Edwards,"Characterisation of small defects using miniaturised EMAT system", NDT & E International,107, 102140 (2019)

O. Trushkevych, T.J.R. Eriksson, S.N. Ramadas, S. Dixon and R.S. Edwards, “Acousto-optics with polymer dispersed liquid crystals for ultrasound sensing”, Applied Physics Letters 107, 054102 (2015)

O. Trushkevych, V.A. Shah, M. Myronov, J.E. Halpin, S.D. Rhead, M.J. Prest, D.R. Leadley and R.E. Edwards, “Laser-vibrometric ultrasonic characterization of resonant modes and quality factors of Ge membranes”, Science and Technology of Advanced Materials, 15, 2, 025004 (2014)

O. Trushkevych, Y. Fan, R. Perry and R.E. Edwards “Magnetic phase transitions in Gd64Sc36 measured using noncontact ultrasonics”, Journal of Physics D: Applied Physics, 46, 105005 (2013)

O. Trushkevych, P. Ackerman, W.A. Crossland, I.I. Smalyukh “Optically Generated Adaptive Localized Structures in Confined Chiral Liquid Crystals Doped with Fullerene”, Applied Physics Letters, 97, 20, 201906, (2010)

O. Trushkevych, F. Gölden, M. Pivnenko, H. Xu, N. Collings, W.A. Crossland, S. Müller and R. Jakoby “Dielectric anisotropy of nematic liquid crystals loaded with carbon nanotubes in a microwave range”, Electronics Letters, 46, 10,693 - 695 (2010) (highlight article)

O. Trushkevych, N. Collings, T. Hasan, V. Scardaci, A. C. Ferrari, T. D. Wilkinson, W. A. Crossland, W. I. Milne, J. Geng, B. F. G. Johnson, and S. Macaulay, “Characterisation of carbon nanotube - thermotropic nematic liquid crystal composite materials”, Journal of Physics D: Applied Physics, 41, 125106 (2008)

Patents

International patent application PCT/GB2007/001784, publication number WO 2007/132230 A1
(US no. 60/800,532)
Method of operating an OASLM and holographic display system

International Patent Application PCP/GB2017/052869, publication number WO 2018/189498
Packaged and enhanced EMAT Ultrasonic NDT System

Fun things

The Hedgehog Fund
Resonate: a string, a concert hall, a universe (Resonate festival)

Resonance is the buzz word at Resonate festival - but noone is discussing it in scientific context! So we set off to correct this and had a lovely session on all things resonance, from bridges and earthquakes to music and stars.

We also tried feeling sound through resonance! Try this at home - inflate a balloon well and sing or talk while holding it. Can you feel it vibrate a little?

photo from the resonate event showing audience holding balloons

Drawing with ultrasound

An ultrasonic transducer is placed at the back of an aluminium plate. The front side of the plate is first painted bright pink and then has a special white coating applied. This white coating changes from white to transparent when it is exposed to ultrasound. Paint-on coatings that visualise ultrasound are promising in many applications.

Playing an ultrasonic drum

We can also see ultrasound in colour! Here a parking sensor, which is like a drum, but very small and so produces ultrasonic fequencies. We can visualise its resonances using a similar coating, here it is on black background. The photo shows vibrational pattern (blue, green, yellow and red rings) for one of higher resonance modes of the "drum".

colourful rings on balck background

Stitching music

As a part of stitch in time project, we stitched music. This is a graphical representation of how our pianos are tuned!

The musical notes - 12 tones - are prepresented in equal temperament - the most commonly used western tuning system. The pitch of each note is represented by the size of the circle, with diameters of circles differing by a facttor of square root of 2 (this is how frequencies of pitches differ for each note). They all go round in circle, as they close the octave!

black canvas with white embroidered pattern  of circles of increasing diameter, arranged in a large circle

Oksanaphoto courtesy Sarah Hill of Gecko Photography

Contact details:

Department of Physics, University of Warwick, Coventry, CV4 7AL

Office: P 158
Telephone:
44 (0)24 765 22248
Fax:
44 (0)24 761 50897
Email: O.Trushkevych@warwick.ac.uk