Linards SKUJA

skujal.jpg (15094 bytes) Dr. habil. phys. Linards SKUJA
Leading Researcher
Institute of Solid State Physics,
University of Latvia

Kengaraga iela 8
Riga, LV 1063
Latvia

Phone: +371 6726 0756
Fax: +371 6713 2778
E-mail: skuja@latnet.lv

Born: 1952, Riga, Latvia

Interests:

Brief description of the main research:

The general research interests concern glassy/amorphous materials for optics and electronics. The main focus is on oxide materials based on SiO2 and GeO2. The motivation for studying these materials is provided by the outstanding physical properties of glassy SiO2 and the key role it plays in a number of modern applications: low-loss optical fibers for communications, ultraviolet and high-power laser optics, insulating oxide layers in silicon-based microelectronics, radiation resistant optical glasses etc. Our work mainly concerns point defects in these materials, their structure, generation mechanisms and optical properties, their impact on practical applications and devices.

Languages: Latvian, English, German, Russian

Education:

Experience:

Work Abroad:

Honours and Awards

Professional Activities and Memberships:

Recent/Representative Publications:

  1. L.N. Skuja, A.R.Silin, A.G.Boganov. On the nature of the 1.9 eV luminescence centers in amorphous SiO2 . J.  Non-Crystalline Solids,  v.63, No3, pp.431-436, (1984).
  2. L. N. Skuja, A. N. Streletsky, A.B. Pakovich. A new intrinsic defect in amorphous SiO2 : Twofold coordinated silicon. - Solid State Comm., v.50, No12, pp.1069-1072 (1984).
  3. L. N. Skuja, A.N. Trukhin, A.E. Plaudis. Luminescence in germanium- doped glassy SiO2. - Physica Status Solidi (a), v.84, No2, p.K153-K157 (1984).
  4. L. N. Skuja. Photoluminescence of intrinsic defects in glassy GeO2 : Twofold coordinated Ge and non-bridging oxygen.-  Physica Status Solidi (a),   v.114, pp.731-737 (1989).
  5. L. Skuja. Isoelectronic series of twofold coordinated Si, Ge, and Sn atoms in glassy SiO2: a luminescence study. - J.Non-Crystalline Solids, v.149, pp.77-95 (1992).
  6. L. Skuja. Direct singlet-to-triplet optical absorption and luminescence excitation band of the twofold-coordinated silicon center in oxygen-deficient glassy SiO2.- J. Non-Crystalline Solids, v.167, pp.229-238 (1994).
  7. L. Skuja .The origin of the intrinsic 1.9 eV luminescence band in glassy SiO2 . - J. Non-Crystalline Solids,  v.179, pp.51-69 (1994).
  8. L. Skuja, T. Suzuki, K. Tanimura.  Site-selective laser spectroscopy studies of the intrinsic 1.9 eV luminescence center in glassy SiO2. - Phys.Rev. B.,   v.52, pp.15208-15216 (1995).
  9. L. Skuja, K.Tanimura, N. Itoh. Correlation between the radiation-induced intrinsic 4.8 eV optical absorption and 1.9 eV photoluminescence bands in glassy SiO2 . - J. Applied Physics, v.80, No 6, pp.3518-25 (1996).
  10. L. Skuja, B. GŁttler. Detection of interstitial oxygen molecules in SiO2 glass by a direct photoexcitation of the infrared luminescence of singlet O2. - Phys.Rev.Letters, v.77, pp.2093-2096 (1996).
  11. L. Skuja, A. Naber. Laser-induced luminescence in glassy SiO2 and neutron-irradiated alpha quartz: three types of non-bridging oxygen hole centers. - Materials Science Forum, vol. 239-241, pp.25-28 (1997).
  12. L. Skuja, B. GŁttler, D. Schiel, A. R. Silin. Quantitative analysis of the concentration of interstitial O2 molecules in SiO2 glass using luminescence and Raman spectrometry. - J. Applied Physics, v.83, No 11, pp.6106-10 (1998).
  13. L. Skuja. The nature of optically active oxygen-deficiency-related centers in amorphous silicon dioxide.-  J. Non-Crystalline Solids, v.239, No 1-3, pp. 16-48 (1998).
  14. L. Skuja, B. GŁttler, D. Schiel, A. R.Silin. Infrared photoluminescence of pre-existing or radiation-induced interstitial oxygen molecules in glassy SiO2 and a -quartz. - Phys.Rev. B, vol.58, No21, pp.14296-14304 (1998).
  15. M. Mizuguchi, L. Skuja, and H. Hosono. Photochemical processes induced by 157-nm light in H2-impregnated glassy SiO2:OH. - Optics Letters, vol. 24, No 13, pp. 863-865 (1999).
  16. M. Mizuguchi, L. Skuja, H. Hosono, T. Ogawa.  F-doped and H2 -impregnated synthetic SiO2 glasses for 157 nm optics. - J.Vac .Sci. Technol. B, v.17, No 6, pp. 3280-3284 (1999).
  17. L. Skuja, M. Hirano, H. Hosono. Oxygen-Related Intrinsic Defects in Glassy SiO2: Interstitial Ozone Molecules. - Phys. Rev.Lett., v.84, No2, pp.302-305 (2000).
  18. L. Skuja, H. Hosono, M. Mizuguchi, B. GŁttler, A. R. Silin. Site-selective study of the 1.8 eV luminescence band in glassy GeO2. - J. Luminescence, v. 87-89, pp.699-701 (2000).
  19. L. Skuja. Optical properties of defects in silica.-  In: Defects in SiO2 and Related Dielectrics: Science and Technology, ed. by G. Pacchioni, L. Skuja and D. L. Griscom, NATO Science Series II, Vol.2, p.73-116, Kluwer Academic Publishers, Dordrecht-Boston-London (2000).
  20. L. Skuja, H. Hosono, M. Hirano. Laser-induced color centers in silica Proc. - SPIE, vol. 4347, pp.155-168, (2001).
  21. L. Skuja, K. Kajihara, T. Kinoshita, M. Hirano. The behavior of interstitial oxygen atoms induced by F2 laser irradiation of oxygen-rich glassy SiO2. - Nuclear Instruments and Methods in Physics Research, vol. B191,  pp.127 –130 (2002).
  22. K. Kajihara, L. Skuja, M. Hirano, H. Hosono. Diffusion and reactions of hydrogen in F2 -laser-irradiated SiO2 glass. - Phys.Rev. Lett., v.89, No13, pp. 135507-1 - 135507-4 (2002).
  23. L. Skuja, H. Hosono, M. Hirano, K. Kajihara. Advances in silica-based glasses for UV and vacuum-UV laser optics. - Proc. SPIE, vol. 5122, p.2-15 (2003).
  24. T.Suzuki, L.Skuja, K.Kajihara, M.Hirano, T.Kamiya, H.Honso. Electronic structure of oxygen dangling in glassy SiO2 : The role of hyperconjugation. – Phys. Rev. Lett., 2003, vol.90, No 18, pp.186404-1 – 186404-4.
  25. K. Kajihara, L.Skuja, M.Hirano, H.Hosono Role of Mobile Interstitial atoms in defect processes in oxides: Interconversion between oxygen-associated defects in SiO2 glass. - Phys. Rev. Letters, 2004, vol. 92, No1, pp.015504-(1-4).
  26. K.Kajihara, Y.Ikuta, M.Oto, M.Hirano, L.Skuja, H. Hosono. UV-VUV laser induced phenomena in SiO2 glass. - Nucl. Instr. Meth. Phys. Res, 2004, vol.B218, pp. 323 –331.

Research Projects:



Last update 23.08.2005