Abstract
Two-photon absorption (TPA) spectra of the Cr2O3 model antiferromagnet have been studied for two polarization configurations at energies ranging from 2.5 to 3.55 eV. Several strong TPA peaks with the maximum coefficient β ∼ 0.08 cm/MW are observed in the 2.7–3.1-eV range characterized by the 4 A 2(F) → 4 T 1(F) d-d one-photon transition of the Cr3+ ion. An analysis of the results obtained suggests that the general form of the TPA spectrum in this range is primarily determined by the resonance at the 2 E(G) and 2 T 1(G) intermediate levels. At energies above 3.44 eV, the TPA coefficient sharply increases up to β ∼ 0.1 cm/MW due to transitions between the valence and conduction bands.
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Translated from Fizika Tverdogo Tela, Vol. 42, No. 10, 2000, pp. 1821–1825.
Original Russian Text Copyright © 2000 by Shablaev, Areshev, Pisarev.
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Shablaev, S.I., Areshev, I.P. & Pisarev, R.V. Resonant two-photon absorption in the Cr2O3 antiferromagnet. Phys. Solid State 42, 1868–1872 (2000). https://doi.org/10.1134/1.1318879
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DOI: https://doi.org/10.1134/1.1318879