Prof. Pavel Apanasevich Profile

Prof. Pavel Apanasevich

at BI Stepanov Institute of Physics

SPIE Involvement:

Author

Proceedings Article | 9 August 2007 Paper

Multi-wavelength quasi-continuous wave all-solid-state system based on Raman lasers

Alexander Vodchits, Dmitry Busko, Valentin Orlovich, Viktor Lisinetskii, Alexander Grabtchikov, Pavel Apanasevich, Hans Eichler

Proceedings Volume 6731, 67310V (2007) https://doi.org/10.1117/12.752639

KEYWORDS: Raman spectroscopy, Crystals, Laser crystals, Nonlinear crystals, Barium, Laser resonators, Axicons, Laser development, Ultraviolet radiation, Refraction

Read Abstract +

Proceedings Article | 6 October 2003 Paper

Barium-nitrate-based Raman lasers excited with LiF:F2-laser and its second harmonic

Alexander Vodchits, I. Mishkel, Valentin Orlovich, Wolfgang Kiefer, Pavel Apanasevich

Proceedings Volume 5137, (2003) https://doi.org/10.1117/12.517924

KEYWORDS: Raman spectroscopy, Laser induced fluorescence, Mirrors, Crystals, Laser crystals, Barium, Tunable lasers, Laser scattering, Color centers, Energy efficiency

Read Abstract +

Proceedings Article | 24 July 2002 Paper

Thermal lensing in barium nitrate due to stimulated Raman scattering of nanosecond laser pulses

Alexander Vodchits, Valery Kozich, Pavel Apanasevich, Valentin Orlovich

Proceedings Volume 4751, (2002) https://doi.org/10.1117/12.475933

KEYWORDS: Crystals, Barium, Nonlinear crystals, Laser crystals, Raman spectroscopy, Raman scattering, Laser scattering, Refractive index, Continuous wave operation, Gases

Read Abstract +

Proceedings Article | 5 March 1999 Paper

Dynamics of light-induced anisotropy in Cu-porphyrin solutions studied with correlation incoherent-light technique

Valery Kozich, A. Vodtchits, Pavel Apanasevich, A. Lau

Proceedings Volume 3735, (1999) https://doi.org/10.1117/12.341455

KEYWORDS: Molecules, Anisotropy, Picosecond phenomena, Diffusion, Signal detection, Polarization, Laser beam diagnostics, Spectroscopy, Four wave mixing, Chemical elements

Read Abstract +

Proceedings Article | 20 May 1996 Paper

Experimental studies of the statistical properties of radiation flows involved in superbroad-band stimulated Raman scattering

A. Vodchitz, Valery Kozich, Pavel Apanasevich, Valentin Orlovich

Proceedings Volume 2800, (1996) https://doi.org/10.1117/12.240529

KEYWORDS: Picosecond phenomena, Femtosecond phenomena, Raman scattering, Laser scattering, Mirrors, Hydrogen, Correlation function, Energy conversion efficiency, Scattering, Light scattering

Read Abstract +

Proceedings Article | 10 May 1996 Paper

Transient hole-burning and free induction decay as a probe of multi-timescale host spin dynamics in low-temperature ion-doped crystals

Pavel Apanasevich, Sergei Kilin, Alexander Nizovtsev, N. Onishchenko

Proceedings Volume 2797, (1996) https://doi.org/10.1117/12.239780

KEYWORDS: Magnetism, Stochastic processes, Hole burning spectroscopy, Ions, Crystals, Ruby, Spin dynamics, Diffusion, Astatine, Cadmium

Read Abstract +

Proceedings Article | 2 January 1995 Paper

Investigation of stability and efficiency of SRS-based sources of radiation for spectroscopy applications

Pavel Apanasevich, Dmitry Gakhovich, A. Grabchikov, Valentin Orlovich, V. Pesotskij

Proceedings Volume 2370, (1995) https://doi.org/10.1117/12.197494

KEYWORDS: Solitons, Raman spectroscopy, Spectroscopy, Laser scattering, Energy efficiency, Scattering, Raman scattering, Quantum efficiency, Hydrogen, Laser applications

Read Abstract +

Proceedings Article | 2 January 1995 Paper

Time-resolved cross-correlation spectroscopy with incoherent light for studying inter- and intramolecular processes

Pavel Apanasevich, Valery Kozich, Valentin Orlovich, A. Vodchitz

Proceedings Volume 2370, (1995) https://doi.org/10.1117/12.197453

KEYWORDS: Spectroscopy, Femtosecond phenomena, Picosecond phenomena, Liquids, Time resolved spectroscopy, Molecules, Nonlinear response, Life sciences, Laser applications, Solids

Read Abstract +

Proceedings Article | 2 January 1995 Paper

Saturation Raman spectroscopy of the excited states of metalloporphyrins

Sergei Kruglik, Pavel Apanasevich, Vladimir Kvach, Valentin Orlovich

Proceedings Volume 2370, (1995) https://doi.org/10.1117/12.197442

KEYWORDS: Raman spectroscopy, Picosecond phenomena, Molecules, Absorption, Life sciences, Spectroscopy, Scattering, Laser applications, Raman scattering, Systems modeling

Read Abstract +

Proceedings Article | 1 May 1991 Paper

Intramolecular processes of excitation energy redistribution in metalloporphyrins: examination by transient absorption and resonance Raman and coherent anti-Stokes Raman scattering spectroscopies

Pavel Apanasevich, V. Chyrvony, Sergei Kruglik, Vladimir Kvach, Valentin Orlovich

Proceedings Volume 1403, (1991) https://doi.org/10.1117/12.57388

KEYWORDS: Raman spectroscopy, Absorption, Spectroscopy, Picosecond phenomena, Copper, Ions, Thermography, Absorption spectroscopy, Molecules, CARS tomography

Read Abstract +

Proceedings Article | 1 May 1991 Paper

Picosecond orientational dynamics of complex molecules studied by incoherent light three-wave mixing

Pavel Apanasevich, Valery Kozich, A. Vodchitz, B. Kontsevoy

Proceedings Volume 1403, (1991) https://doi.org/10.1117/12.57277

KEYWORDS: Molecules, Picosecond phenomena, Bioalcohols, Molecular lasers, Four wave mixing, Light sources, Time metrology, Laser applications, Physics, Nd:YAG lasers

Read Abstract +

Proceedings Article | 1 May 1991 Paper

Inter- and intramolecular processes in metalloporphyrins: study by transient absorption and resonance Raman and coherent anti-Stokes Raman scattering

Pavel Apanasevich, Vladimir Chirvony, Sergei Kruglik, Vladimir Kvach, Valentin Orlovich

Proceedings Volume 1403, (1991) https://doi.org/10.1117/12.57272

KEYWORDS: Absorption, Raman spectroscopy, Molecules, Laser applications, Picosecond phenomena, Spectroscopy, Metals, Scattering, Laser scattering, Raman scattering

Read Abstract +

The steady interest in metalloporphyrins (Me-P) which have a central metal with an unfilled d-electronic shell is due to the rich variety of photoinduced physico-chemical processes they participate in, and by the possibility of modelling on the basis of them, the behavior of related native biological complexes. Me-Ps with an unfilled d-shell of the central atom have typical two-band absorption spectra in the ground electronic state: intense Soret or B band in the near UV and less intense Q band in the visible. According to Gouterman's fourorbital model,' the Me-P absorption spectrum arises from the promotion of ir-electrons from the highest occupied molecular orbitals a, , a2 to the lowest unoccupied orbitals e of the porphyrin conjugated macrocycle. The a, and a2 orbitals are quasi-degenerate and the electron excited configurations e have the same symmetry. That is why there is a strong mixing between the two orbital excitations a, -e and a, - e due to the configurational interaction via the electron-electron repulsion, resulting in a two-band absorption spectrum. The effect of the central atom is interpreted in this model as a perturbation of the ir-states of the porphyrin ring. The perturbation is largely determined by the electrons of the unfilled shells of the metal ion (e.g. the md'-shell). This effect is quite pronounced for the ground electronic state, nevertheless the interactions of excited ir-electronic configurations with d-electron ones cause more dramatic changes in the spectroscopic properties of Me-P excited states. New low-lying excited states are possible: the charge-transfer (CT) levels related to the electrodensity transfering from the ring a, , a2 to the d-orbitals of central metal (ir-d states) or from the d-orbitals to the ring e(d - ir states), and (d - d) levels bound up with the d-electron excitations. The present paper deals with the investigations of porphyrin metallocomplexes with nickel (Ni-P) and copper (Cu-P) having electron configurations 3d8 and 3d9 , respectively.

Showing 5 of 12 publications

SPIE Conference Volume | 29 May 2002

ICONO 2001: Fundamental Aspects of Laser-Matter Interaction and Physics of Nanostructures

SPIE Conference Volume | 2 January 1995

5th International Conference on Laser Applications in Life Sciences

Conference Committee Involvement (4)

The International Conference on Coherent and Nonlinear Optics

28 May 2007 | Minsk, Belarus

ICONO 2001: Fundamental Aspects of Laser-Matter Interaction and Physics of Nanostructures

26 June 2001 | Minsk, Belarus

Laser Applications in Life Sciences: 5th International Conference

1 January 1995 | Minsk, Belarus

Laser Applications in Life Sciences: 5th International Conference

1 July 1994 | Minsk, Belarus

Keywords/Phrases

Search In:

Publication Years