Group of parametric processes and optical vortices
Head of scientific group:
Prof. habil. dr. Valerijus Smilgevičius
Description:
The main research activities in Group of parametric processes and vortices are:
• Experimental investigations of fundamental three-wave optical parametric generation and amplification processes in bulk crystals as well as periodically poled materials, namely transformations of spatial profile during parametric light interaction, control over spectral bandwidth and exploration of new pumping schemes. Also, the concept of optical parametric chirped pulse amplification is exploited for the generation of ultrashort powerful pulses in the visible to obtain a TW-class level radiation.
• Special attention is paid to unusual light structures such as quasi-nondiffracting Bessel beams and optical vortices. The investigation of formation, propagation and nonlinear transformations of special spatial structures in media with second and third order nonlinearities are performed.
Publications:
Jarutis V., Matijošius A., Smilgevičius V., Stabinis A. Second harmonic generation of higher-order Bessel beams // Opt. Commun. – 2000, V.185, No1-3, p.159-169.
Vladas Pasiskevicius, Jonas A. Hellstrom, Shunhua Wang, Jens A. Tellefsen, Fredrik Laurell, Valerijus Smilgevicius, Algis Stabinis, Algis S. Piskarskas, Broadly tunable noncollinear optical parametric oscillator with periodically poled KTiOPO4 // Proc. SPIE Vol. 3928, p. 37-42, Nonlinear Materials, Devices, and Applications; Jeffrey W. Pierce; Ed., (2000)
Characiejus D., Didžiapetrienė J., Graželienė G., Kazlauskaitė N., Prasmickienė G., Rotomskis R., Smilgevičius V., Streckytė G., Šukelienė D. Fotosensibilizuotos navikų terapijos ir antinavikinio vaisto adriamicino sukelti efektai // Medicina. – 1999, No. 35(3), p. 100-104.
Gadonas R., Jarutis V., Matijošius A., Piskarskas A., Smilgevičius V., Stabinis A. Second harmonic generation of Bessel vortices // Liet. fiz. žurn. – 1999, No 39, p.
Piskarskas A., Smilgevičius V., Vaičaitis V. Four photon parametric generation excited by counterpropagating light pulses in sodium vapour // Lith. J. Phys. – 1999, V. 39, p. 123–128.
Piskarskas A., Smilgevičius V., Vaičaitis V. Multiphoton parametric processes during interaction of counterpropagating light pulses with sodium vapour // Opt. and Quant. Electronics. – 1999, V. 31, p. 263-267.
Jarutis V., Piskarskas A., Smilgevičius V., Stabinis A. Output patterns of optical parametric amplifiers and generators pumped by conical beams //J. Opt. B. Quantum and Semiclassical Optics. – 1999, No 1, p. 52-57.
Piskarskas A., Smilgevičius V., Stabinis A., Vaičaitis V. Spatially cumulative phenomena and output patterns in optical parametric oscillators and generators pumped by conical beams // Journal of Optical Society of America B. – 1999, No 16, p. 1566-1578.
Beržanskis A., Di Trapani P., Piskarskas A., Smilgevičius V., Stabinis A. Interaction of optical vortices in nonlinear crystals // Optical vortices, Horizons in World Physics). / Ed. M.Vasnetsov. - New York: Nova Science Publishers, 1999, V. 228, p. 263-310.
Gadonas R., Jarutis V., Marcinkevičius A., Piskarskas A., Smilgevičius V., Stabinis A. Bessel-beam pumped optical parametric generator // Thesis of CLEO/EUROPE-EQEC '98. – 1998, p. QFA1.
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