Polarisation characteristics of two-photon absorption in an LiF:F2−crystal at the 1.06 μm wavelength
| Autor: | S M Shpuga, V. A. Konyushkin, Alexander V. Kir'yanov, Pavel P Pashinin, Tasoltan T. Basiev, Nikolai N Il'ichev |
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| Rok vydání: | 1996 |
| Předmět: |
Materials science
Absorption cross section chemistry.chemical_element Statistical and Nonlinear Physics Radiation Two-photon absorption Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Crystal Wavelength chemistry Excited state Fluorine Electrical and Electronic Engineering Atomic physics Absorption (electromagnetic radiation) |
| Zdroj: | Quantum Electronics. 26:145-149 |
| ISSN: | 1468-4799 1063-7818 |
| DOI: | 10.1070/qe1996v026n02abeh000611 |
| Popis: | Strong 1.06 μm radiation was shown to be capable of orientationally selective bleaching of the F2− colour centres in a crystal of LiF. Conditions were found under which only identically oriented F2− colour centres remained unbleached. Crystals in which the F2− centres remained identically oriented were used to find the polarisation characteristics of two-photon absorption. The rate of bleaching of the colour centres as a result of two-photon absorption by an excited state was proportional to cos2θ where θ is the angle between the orientation of the electric vector of the strong wave and the axis joining the fluorine vacancies in the F2− centres. The two-photon absorption cross section of the excited F2− centres was estimated to be σ2 = 3.5×10-51 s cm4. |
| Databáze: | OpenAIRE |
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