A
Aliaksandr Karotki
Researcher at Montana State University
Publications - 36
Citations - 1890
Aliaksandr Karotki is an academic researcher from Montana State University. The author has contributed to research in topics: Two-photon absorption & Absorption spectroscopy. The author has an hindex of 13, co-authored 34 publications receiving 1841 citations. Previous affiliations of Aliaksandr Karotki include University of Toronto & Polish Academy of Sciences.
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Journal ArticleDOI
Understanding strong two-photon absorption in pi-conjugated porphyrin dimers via double-resonance enhancement in a three-level model.
Mikhail Drobizhev,Yuriy Stepanenko,Yuliya Dzenis,Aliaksandr Karotki,Aleksander Rebane,Peter N. Taylor,Harry L. Anderson +6 more
TL;DR: The two-photon absorption spectra of a series of conjugated porphyrin dimers are presented and it is demonstrated that they possess extremely large intrinsic peak 2PA cross sections, up to sigma2 = 1 x 104 GM in the near-IR region; these are among the highest values measured for any organic molecule.
Journal ArticleDOI
Extremely strong near-IR two-photon absorption in conjugated porphyrin dimers: quantitative description with three-essential-states model.
Mikhail Drobizhev,Yuriy Stepanenko,Yuliya Dzenis,Aliaksandr Karotki,Aleksander Rebane,Peter N. Taylor,Harry L. Anderson +6 more
TL;DR: The absolute values of the 2PA cross section in these molecules are quantitatively described by a quantum-mechanical expression, derived for the three-level model, which makes them particularly attractive for photodynamic therapy.
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Strong cooperative enhancement of two-photon absorption in dendrimers
Mikhail Drobizhev,Aliaksandr Karotki,Yuliya Dzenis,Aleksander Rebane,Zhiyong Suo,Charles W. Spangler +5 more
TL;DR: In this article, the authors present unambiguous spectroscopic evidence of strong cooperative enhancement of two-photon absorption (TPA) in a series of dendritic macromolecules.
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Dendrimer molecules with record large two-photon absorption cross section.
TL;DR: The dependence of TPA on excitation wavelength in three consecutive generations of the dendrimer is measured and it is shown that the maximum sigma(2) value increases faster than the total number of stilbene chromophores.
Journal ArticleDOI
Resonance enhancement of two-photon absorption in porphyrins
TL;DR: In this article, two-photon absorption spectra in absolute cross-section values are presented for a number of octaethyl-, tetraphenyl-, and tetrabenzo-substituted porphyrins.