Study of the Luminescence Power of Excitons and Impurity–Defect Centers Excited via Two-Photon Absorption
| Autor: | Anastasiya V. Ryabova, V. P. Kalinushkin, M. I. Studenikin, E. S. Gulyamova, V V Tumorin, Pavel P Pashinin, N. N. Il’ichev, A. A. Gladilin, V. A. Chapnin, Oleg V. Uvarov, A. V. Sidorin, V. P. Danilov |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Exciton Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Two-photon absorption Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Power (physics) Crystal Condensed Matter::Materials Science Impurity Condensed Matter::Superconductivity Excited state 0103 physical sciences Atomic physics 0210 nano-technology Luminescence Excitation |
| Zdroj: | Semiconductors. 54:67-72 |
| ISSN: | 1090-6479 1063-7826 |
| Popis: | The effect of the average power of femtosecond laser radiation on the average luminescence power of excitons and impurity–defect centers on the two-photon excitation of the electron system of a crystal is studied experimentally and theoretically using ZnSe:Fe2+ single crystals as an example. It is experimentally shown that, in the region of excitation powers under consideration, the average luminescence power of excitons in the crystal is proportional to the 4th power of the average excitation-radiation power. The average luminescence power of impurity–defect centers is of quadratic character. A theory is developed to interpret the experimentally observed dependences. It is noted that the dependence of the luminescence power of a crystal on the pump power upon two-photon excitation can be used to estimate the degree of contamination of the crystal with impurity–defect centers. |
| Databáze: | OpenAIRE |
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