Persistent spectral hole burning by simultaneous two-photon absorption

Drobizhev, M.; Karotki, A.; Rebane, A. (2001). Persistent spectral hole burning by simultaneous two-photon absorption. Chem. Phys. Lett., 334, 76-82.
ajakirjaartikkel
Drobizhev, M.; Karotki, A.; Rebane, A.
Chem. Phys. Lett.
0009-2614
334
2001
76-82
Ilmunud
1.1. Teadusartiklid, mis on kajastatud Web of Science andmebaasides Science Citation Index Expanded, Social Sciences Citation Index, Arts & Humanities Citation Index ja/või andmebaasis Scopus (v.a. kogumikud)
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English, We show for the first time persistent spectral hole burning by simultaneous absorption of two 1 138 nm photons in an inhomogeneously broadened S-1 < -- S-0 (Q(y)) transition of unstable photo-tautomer of chlorin in polymer film at low temperature. Spectrally selective hole burning is achieved due to high (10%) quantum efficiency of photo-transformation in that system and high peak intensity (tens of GW/cm(2)) of near-infrared femtosecond pulses used for excitation. Two-photon absorption cross-section is measured for both stable and unstable photo-tautomers to be < sigma >(2) = (0.5 0.2) x 10(-50) cm(4) s photon(-1). (C) 2001 Elsevier Science B.V. All rights reserved.
2-PHOTON SPECTROSCOPY; PICOSECOND PULSES; STORAGE; FLUORESCENCE;