Tz Babeva

Tsvetanka Babeva, PhD
Arnold F. Graves postdoctoral research fellow

Tel: +353-1-4024583

Fax: +353-1-4024988

Email: tzwetanka.babeva@student.dit.ie

Brief Biography
Educated at Sofia State University "St. Kliment Ochridski", graduated in 1994 with M.Sc. in physics (applied optics). Worked as a physicist in Central Laboratory of Photoprocesses at Bulgarian Academy of Sciences (from 1995). Spent three years as a PhD student (2001-2003), obtaining PhD degree with thesis entitled “Optimization of spectrophotometric methods for determining optical constants and thickness of thin films” (2003). Joined DIT as an Arnold F. Graves postdoctoral research fellow in January 2007.

Research Interests
Research interests are in the field of thin film optics, interaction of matter with light, light induced phenomena, optical characterization, computer simulation and modeling of experimental results. Currently – theoretical modeling of recording processes in zeolite nanocomposites. 11 years experience in thin film optical investigation.

Publications

Tz. Babeva and S. Kitova, “Reflectance methods for determining the optical constants of highly absorbing films: comparative analysis of the accuracy” , J. Opt. A: Pure Appl. Opt. 9, (2), 145-151, (2007).
E. Atanassova, G. Aygun, R. Turan, Tz. Babeva, “Structural and optical characteristics of tantalum oxide grown by pulsed Nd:YAG laser oxidation”, Journal of Vacuum Science and Technology A, 24 (2), 206-211, (2006).
S. S. Tinchev, Y. Dyulgerska, P. Nikolova, D. Grambole, U. Kreissig, Tz. Babeva, “Optical properties of PECVD deposited DLC films prepared with air addition”, Journal of Optoelectronics and Advanced Materials, Vol. 8, No. 1, 308-312, (2006).
S. Kitova, S. Youroukov, Tz. Babeva, V. Denishev, G. Danev, “Argon ion activated deposition of SiO2 films”, Journal of Optoelectronics and Advanced Materials, Vol. 7, No. 5, 2613-2618, (2005).
B. Mednikarov, G. Spasov, Tz. Babeva, J. Pirov, M. Sahatchieva, C. Popov, W.Kulisch, “Optical properties of diamond-like carbon and nanocrystalline diamond films”, Journal of Optoelectronics and Advanced Materials Vol. 7, No. 3, 1407-1413, (2005).
B. Mednikarov, G. Spasov, Tz. Babeva, “Aluminum nitride layers prepared by DC/RF magnetron sputtering”, Journal of Optoelectronics and Advanced Materials Vol. 7, No. 3, 1421 – 1427, (2005).
G. Aygun, E. Atanassova, R. Turan, Tz.Babeva , “Reflectance spectra and refractive index of Nd:YAG laser oxidized Si surface”, Mater. Chemistry and Phys, 89, 316-320, (2005).
Tz. Babeva, E. Atanassova and J. Koprinarova, “Optical characteristics of rf sputtered Ta2O5 films”, Physica Status Solidi, 202, 330-336, (2005).
S. S. Tinchev, R. I. Nikolova, J. T. Dyulgerska, G. Danev, Tz. Babeva, “a-C:H absorber layer for solar cells matched to solar spectrum”, Solar Energy Materials&Solar Cells, 86, 421-426, (2005)
J. Dikova, Tz. Babeva and P. Sharlandjiev, “Photoinduced scalar and vector effects in obliquely deposited a-As2S3 thin films”, Journal of Optoelectronics and Advanced Materials, 7, 361-364, (2005).
J. Dikova, Tz. Babeva, Tz. Iliev, “Photoinduced optical changes in vacuum deposited nanocrystalline As2S3 films”, Journal of Optoelectronics and Advanced Materials Vol. 7, No. 3, 1281-1286, (2005).
P. Vitanov, Tz. Babeva, Z. Alexieva, A. Harizanova and Z. Nenova, “Optical properties of (Al2O3)x(TiO2)1-x films deposited by the sol-gel method”, Vacuum 76, 219-222, (2004).
J. Dikova, P. Sharlandjiev, P. Gushterova, T. Babeva, “Photoinduced changes in the optical properties of obliquely deposited a-As2S3 films”, Vacuum 69, 395-398, (2003).
Tz. Babeva, S. Kitova, B. Mednikarov and I. Konstantinov, “Preparation and characterization of a reference aluminum mirror”, Appl. Opt. 41, 3840-3846, (2002).
I. Konstantinov, P. Sharlandjiev, Tz. Babeva and S. Kitova, “Simulation of the diffraction by CD-R.Thickness determination of dye recording layer”, J. Opt. A: Pure Appl. Opt. 3, No 6, 460-465, (2001).
Tz. Babeva, S. Kitova and I. Konstantinov, “Photometric methods of determination of the optical constants and the thickness of thin absorbing films: Selection of a combination of photometric quantities on the base of ?rror analysis”, Appl. Opt. 40, 2675-2681, (2001).
Tz. Babeva, S. Kitova and I. Konstantinov, “Photometric methods of determination of the optical constants and the thickness of thin absorbing films: Criteria for precise and unambiguous determination of n, k and d in a wide spectral range”, Appl. Opt. 40, 2682-2686, (2001).
Tz. Babeva, D. Dimitrov, S. Kitova and I. Konstantinov, “Optical properties of phase-change optical disks with SbxSe100-x films”, Vacuum 58, 496-501,(2000)
I. Konstantinov, Tz. Babeva and S. Kitova, “Analysis of errors in thin-film optical parameters derived from spectrophotometric measurements at normal light incidence”, Appl. Opt. 37, 4260-4267, (1998).

Contribution to academic conferences
J.Dikova, Tz. Babeva, Tz. Iliev, “Optical behavior of vacuum deposited amorphous and nano-crystalline AS2S3 films before and after irradiation” - Functional Properties of Nanostructured Materials, NATO Science series, volume 223, (Springer 2006, Netherlands), (EDITOR(S): Rainer Kassing, Plamen Petkov, Wilhelm Kulisch and Cyril Popov), 373-378.
D. Z. Dimitrov, C. Babeva, S.T. Cheng, W. C. Hsu, M.-H. Hsieh, S. Y. Tsai, “High-Speed Reversible Phase-Change Optical Recording in GeSb – Based Alloys”, Paper presented on the 3rd E*PCOS 04 symposium, Balzers, Principality of Liechtenstein, Sept 2004. //www.epcos.org/E_PCOS04.htm
D. Z. Dimitrov, C. Babeva, S.-T.Cheng, W.-C. Hsu, M.-H. Hsieh, and S.-Y.Tsai "GaGeSb materials for high–speed phase–change optical recording", Optical Data Storage Topical Meeting 2004, ODS Technical Digest, pp. 79-81 (2004).
Dimitre Z. Dimitrov, Cvetanka Babeva, Shun-Te Cheng, Wei-Chih Hsu, Ming-Hsun Hsieh, Song-Yeu Tsai, “GaGeSb alloys for high-speed reversible phase-change optical recording”, Proc. SPIE, Vol. 5380, p. 487-492, Optical Data Storage 2004; B. V. K. Vijaya Kumar, Hiromichi Kobori; Eds., (2004)
J. Dikova, Tz. Babeva, Tz. Iliev, “Optical properties of nano-crystalline As2S3 thin films” Nanoscience & Nanothechnology 4, pp 180-183, (2004), (Eds. E. Balabanova, I. Dragieva, Heron Press, Sofia); Proceeding of the Fifth Workshop Nanostructered materials application and innovation transfer
V. Boev, Tz. Iliev, Tz. Babeva, “EDX Analysis of thin films obtained from the Ge-Se-AgI System”, Nanoscience & Nanothechnology 3, pp 191-193, (2003), (Eds. E. Balabanova, I. Dragieva, Heron Press, Sofia); Proceeding of the Work Shop of Nano Technology
V. Marinova, M. Gospodinov, Tz. Babeva, Shiuan Huei Lin and Ken Yuh Hsu, “Crystal growth and photochromic effect in doped Bi4Ge3O12 eulitites”, Proceeding of International meeting on Optics in Computing, Taipei, Taiwan, April 2002, pp 255-257.
J.Kaneti, T.Deligeorgiev, Tz.Babeva, S.Kitova and I.Konstantinov, “Dependence of the optical constants of cyanine dyes for CD-R on their Molecular structure”, Proceeding of the 11th ISCMP, Varna 2000, “Materials for information technology in the new millennium”, 420-423, (2001).
R. Todorov, Tz. Babeva and K. Petkov, “Determination of the optical constants and thickness of thin As-Ge-S films from the transmission and reflection spectra”, Proceeding of the 11th ISCMP, Varna 2000, “Materials for information technology in the new millennium”, 304-307, (2001)
Tz. Babeva, S. Kitova, D. Dimitrov and I. Konstantinov, “The influence of annealing on the optical properties of amorphous Sb2Se3 thin films”, Proceeding of the 9th ISCMP Varna' 96 “Future directions in thin film science and technology”, 529-531, (1996)