Institute of Solid State Physics
Bulgarian Academy of Sciences















Union of the Physicists in Bulgaria

Created 18.6.2020
Updated 16.4.2021

Veselin Ljubomirov Strashilov
(15.07.1949 16.06.2020)

Born in Turnovo


He obtained master degree (1972) and doctorate (1978) from the Sofia University.

Prof. V. Strashilov became Sc.D. (2006)

Professional experience

He has been appointed at the Bulgarian Academy of Sciences Institute of Solid State Physics Acoustoelectronics laboratory (19791986)

He became Sofia University associate professor (1989), professor (2007) and head of the Solid State Physics and Microelectronics Department at the Faculty of Physics


Prof. Strashilov's experimental research areas are solid state physics, semiconductors, acoustical and optical waves in solids and polymers, acoustooptics, new materials, microelectronics physics

Teaching activities

He lectured many university courses

  1. acoustical and optical waves in solids

  2. semiconductors and dielectric optics

  3. introduction of matherial physics (physical properties)

  4. microelectronics physical bases

  5. polymers in microelectronics

  6. acoustical and optical waves in microelectronics

  1. (1975) M. Borisov, V. Hinkov, J. Burov, V. Strashilov, K. Bransalov, A resonant gate transistor with an active vibrator (RGTAV), International Journal of Electronics, 39, No 4, 377384

  2. (1978) M. Borissov, V. Strashilov, K. Branzalov, J. Bourov, Principles of the monolithic crystal transformer (MCT), Comptes rendus de lAcademie bulgare des Sciences, 31, No 2, 167169

  3. (1978) V. Strashilov, K. Bransalov, M. Borissov, Transmission characteristics of two-electrode monolithics systems, Bulgarian Journal of Physics, 5, No 2, 221236

  4. (1979) V. Strashilov, M. Borissov, K. Branzalov, D. Mirtcheva, An application of thickness-shear approximation to the analysis of multielectroded monolithic structures, Wave electronics, 4, 6780

  5. (1979) K. Bransalov, V. Strashilov, A. Manov, A monolithic piezoelectric amplitude modulator, International Journal of Electronics, 47(6), 545-553

  6. (1980) V. Strashilov, V. Hinkov, K. Bransalov, Trapped-energy flexural mode filter, Electronics Letters 16 (19), 729-730

  7. (1981) V. Strashilov, V. Hinkov, K. Branzalov, Trapped Energy Thickness-Flexural Modes Model of Elongated Rectangular Plates, IEEE Transactions on Sonics and Ultrasonics 28 (5), 349-355

  8. (1982) M. Borissov, V. Strashilov, V. Hinkov, Acoustic and optical waves in solid state electronics, In: Optical and acoustic waves in solids modern topics, Proceedings of the II International school on condensed matter physics, ISCMP82, Varna, Bulgaria, 2330.09.1982. Singapore, World Scientific, 150

  9. (1983) K. Germanova, L. Konstantinov, V. Strashilov, Sub-bandgap surface photovoltage in deep bulk impurity level semiconductors, Surface Science, 128(2-3), 447-463

  10. (1984) K. Bransalov, V. Strashilov, Piezoelectric Resonator with Cutoffs Coefficients, Docladi na BAN, 37(10) 1315-1318

  11. (1985) L. Konstantinov, V. Strashilov, O. Ivanov, Kinetics and polarity of the transverse acoustoelectric effect in the separated-medium surface acoustic wave configuration, Journal of Physics D, 18(7), L79-L85

  12. (1986) L. Konstantinov, V. Strashilov, O. Ivanov, M. Borissov, I. Yakovkin. Anomalous acoustoelectric effect in SAW-layered structures, In: Proceedings of the I International sympposium surface waves in solids and layered structures, Novosibirsk, 1, 251254

  13. (1986) V. Strashilov, L. Konstantinov, A. Manov, Temperature dependence of the force-frequency effect in noncentral AT-cut quartz resonators, Proceedings of the IEEE, 74(6) 889-890

  14. (1987) K. Germanova, C. Hardalov, V. Strashilov, B. Georgiev, An improved apparatus for surface photovoltage studies with a bimorphous piezoelectric Kelvin probe, Journal of Physics E: Scientific Instruments, 20(3), 273

  15. (1987) V. Strashilov, L. Konstantinov, O. Ivanov, Topographical study of conducting surface by using a combined photo-acoustoelectronical methods, Applied Physics B, (43) 17-21

  16. (1987) V. Strashilov, K. Gentchev, Computation method for slowness curves in materials with arbitrary piezoelectricity, Acoustics letters, 11(3), 26-30

  17. (1988) V. Strashilov, Ultrasonic attenuation in glasses at low temperature, Bulgarian Journal of Physics 15 (3), 230-238

  18. (1989) V. Strashilov, M. Nadoliiski, Thickness-shear approximation for piezoelectric ceramic plates, International Journal of Electronics, 66(3), 399-408

  19. (1990) M. Abedin, V. Strashilov, P. Das, Anomalous acoustoelectric effect in semiconductor layered structures using separated medium configuration, Solid-state electronics, 33(1), 65-68

  20. (1991) V. Strashilov, B. Boyanov, A numerical data analysis of thickness modes in arbitrary coupling piezoelectric plates, Journal of applied physics, 69(2), 584-591

  21. (1991) V. Strashilov, B. Boyanov, Electromechanical coupling in thickness-multimode piezoelectric resonators and transducers, Journal of applied physics, 69(2) pp. 592-596

  22. (1991) A. Mitev, V Strashilov, J Burov, A direct method for measuring the temperature coefficients of bulk acoustic velocities in crystals, Applied Physics A 52 (6), 369-372

  23. (1991) A. Mitev, V Strashilov, J Burov, On the nonhomogeneity of the Schaefer-Bergmann diffraction patterns on acousto-optics, Acoustics letters 14 (12), 246-250

  24. (1992) B. Boyanov, V. Strashilov, Transmission and reflection coefficients for surface transverse waves propagating under shorted metal strip gratings, IEEE transactions on ultrasonics, ferroelectrics, and frequency control, 39(1) pp. 119-121

  25. (1995) B. Boyanov, K. Djordjev, V. Strashilov, I. Avramov, COM theory analysis of STW resonator structures, in Proceedings IEEE Ultrasonics Symposium, t. 1, pp. 317-320

  26. (1996) S. Mesochorianakis, J. Burov, V. Strashilov, M. Christov, Multibeam phased array with dynamic focusing and improved image quality, In: P. Tortoli, L. Masotti, (Eds.), Acoustical Imaging, Volume 22, Plenum Press, New York, 483-488

  27. (1997) V. Strashilov, K. Djordjev, B. Boyanov, I. Avramov, A coupling-of-modes approach to the analysis of STW devices, IEEE Transaction on Ultrasonics Ferroelectrics, and Frequency Control, 44(3) 652-657

  28. (1997) V. Strashilov, J. Burov, M. Nikolov, Dynamic shear piezoelectricity of poly (vinylidene fluoride) thin films, IEEE transactions on ultrasonics, ferroelectrics, and frequency control, 44(6) 1181-1188

  29. (1998) K. Djordjev, V. Strashilov, The effect of mass-loading on velocity dispersion and coupling of STW, IEEE Ultrasonics Symposium. Proceedings (Cat. No. 98CH36102) 1, 261-264

  30. (1999) V. Strashilov, K. Djordjev, V. Yantchev, The coupling of modes approach to the analysis of STW devices, IEEE Transaction on Ultrasonics Ferroelectrics, and Frequency Control (46) 1512-1517

  31. (1999) V. Strashilov, K. Djordjev, V. Yantchev, The coupling-of-modes approach to the analysis of STW devices. II, IEEE transactions on ultrasonics, ferroelectrics, and frequency control, 46(6) 1512-1517

  32. (1999) V. Strashilov, Split-electrode thin film transducer for acoustic applications, Review of scientific instruments, 70(1), 92-94

  33. (1999) S. Mesohoryanakis, V. Strashilov, A study on multiphase composites for acoustic inhomogeneous impedance matching layers, Bulgarian journal of Physics 26 (1), 53-64

  34. (2000) V. Strashilov, Efficiency of poly (vinylidene fluoride) thin films for excitation of surface acoustic waves, Journal of Applied Physics, 88(6), 3582-3586

  35. (2000) V. Yanchev, V. Strashilov, A study on the Q-factor of STW resonators by a COM theory, IEEE Ultrasonics Symposium. Proceedings. An International Symposium, (1) 43-46

  36. (2002) V. Yantchev, V. Strashilov, M. Rapp, U. Stahl, I. Avramov, Theoretical and experimental mass-sensitivity analysis of polymer-coated SAW and STW resonators for gas sensing applications, IEEE sensors journal, 2(4), 307-313

  37. (2002) V. Yantchev, V. Strashilov, Coupling-of-modes analysis of STW resonators including loss mechanism, IEEE transactions on ultrasonics, ferroelectrics, and frequency control, 49(3) pp. 331-336

  38. (2002) V. Yantchev, V. Strashilov, Surface transverse waves in polymer-coated grating configurations, Journal of applied physics, 91(9), 5700-5705

  39. (2003) V. Yanchev, V. Strashilov, Reflectivity in surface transverse wave gratings, Journal of applied physics 94 (9), 6212-6214

  40. (2005) V. Strashilov, V. Yantchev, V. Strashilov, I. Katardjiev, V. Yantchev, Surface transverse waves: properties, devices, and analysis, IEEE transactions on ultrasonics, ferroelectrics, and frequency control, 52(5) 812-821

  41. (2009) V. Strashilov, G. Alexieva, V. Velichkov, R. Mateva, I. Avramov, Polymer-coated quartz microbalance sensors for volatile organic compound gases, Sensor Letters, 7(2), 203-211

  42. (2009) I. Avramov, L. Arapan, I. Katardjiev, V. Strashilov, V. Yantchev, IC-compatible power oscillators using thin film plate acoustic resonators (FPAR), IEEE International Ultrasonics Symposium, 855-858

  43. (2009) V. Strashilov, G. Alexieva, V. Velichkov, I. Avramov, S. Evans, STW resonator with organo-functionalized metallic nanoparticle film for vapor sensing, IEEE transactions on ultrasonics, ferroelectrics, and frequency control 56(5) pp. 1018-1023

  44. (2010) I Kolev, V Mavrodinova, G Alexieva, V Strashilov, Pore volume probing of boron-modified MCM-22 zeolite by quartz crystal microbalance assisted study of o-and p-xylene adsorption, Sensors and Actuators B: Chemical, 149(2), 389-394

  45. (2011) L. Arapan, G. Alexieva, I. Avramov, E. Radeva, V. Strashilov, I. Katardjiev, Highly mass-sensitive thin film plate acoustic resonators (FPAR), Sensors, 11(7), 6942-6953

  46. (2011) L. Arapan, I. Katardjiev, V. Yantchev, G. Alexieva, V. Strashilov, I. Avramov, E. Radeva, Polymer coated thin film plate acoustic resonators (FPAR) for gas sensing applications, Joint Conference of the IEEE International Frequency Control and the European Frequency and Time Forum (FCS) Proceedings, pp. 1-5

  47. (2015) V. Strashilov, G. Alexieva, B. Vincent, V. Nguyen, D. Rouxel, Structural impact on piezoelectricity in PVDF and P (VDF-TrFE) thin films, Applied Physics A, 118(4), 1469-1477

  48. (2016) I. Youssef, F. Sarry, B. Nysten, G. Alexieva, V. Strashilov, I. Kolev, H. Alem, Growth and toxic gas sensing properties of poly (urethaneimide) thin films, Talanta, (153) 145-151

  49. (2016) I. Kolev, G. Alexieva, V. Strashilov, I. Youssef, F. Sarry, H. Alem, Layer thickness impact on the capacity of poly (urethaneimide) for sorbing toxic gases, Journal of Applied Polymer Science 133 (48)

  50. (2016) V. Strashilov, G. Alexieva, G. Tsutsumanova, I. Kolev, I. Avramov, Gas adsorption on ZnO nanowires as studied by surface acoustic wave resonators, Bulgarian Chemical Communications, 48(1), 134-140

  51. (2017) T. Babeva, V. Vassilev, P. Gushterova, A. Amova, G. Alexieva, V. Strashilov, Optical properties of chalcogenide glasses from the system As2Se3-Ag4SSe-PbTe, Journal of Optoelectronics and Advanced Materials, (19) 204-210

  52. (2018) I. Kolev, N. Ivanova, G. Alexieva, G. Tsutsumanova, V. Strashilov, Diltiazem-loaded Eudragit RS 100 microparticles for drug delivery: the challenge of viscosity, Scripta Scientifica Pharmaceutica, 5 (1), 20-24

  53. (2019) I. Kolev, N. Ivanova, M. Marinov, G. Alexieva, V. Strashilov, A QCM-based assay of drug content in Eudragit RS 100-based delivery systems, Talanta, (202) 531-539


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  2. C. Clemens, W. Ruppel, T. Fjeldly, A. Baghai-wadji (Eds.), Advances In Surface Acoustic Wave Technology, Systems & Applications, Vol 2, World Scientific, p. 77 (2001)

  3. O. Ivanov (Ed.), Applications and Experiences of Quality Control, InTech (2011)