Interband two-photon absorption in strontium barium niobate crystals
| Autor: | Lyudmila I Ivleva, V. I. Lukanin, D S Chunaev, Petr G. Zverev, Aleksandr Ya Karasik |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Strontium
Materials science Physics::Optics chemistry.chemical_element Statistical and Nonlinear Physics Barium Photorefractive effect Strontium barium niobate Two-photon absorption Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Ion chemistry.chemical_compound chemistry Excited state Electrical and Electronic Engineering Atomic physics Absorption (electromagnetic radiation) |
| Zdroj: | Quantum Electronics. 42:595-599 |
| ISSN: | 1468-4799 1063-7818 |
| DOI: | 10.1070/qe2012v042n07abeh014846 |
| Popis: | Interband two-photon absorption in photorefractive strontium — barium niobate crystals SrxBa1-xNb2O6 (x = 0.61, 0.75), both pure and doped with Ni and La ions, is studied under excitation by trains of 523.5-nm picosecond laser pulses. The two-photon absorption coefficients are found to vary from 0.17 to 0.31 cm GW-1 depending on the azimuth of the linear polarisation of the pump radiation and on the chemical composition of samples. The dependences of the transmission of crystals on the pump radiation intensity show a hysteresis related to induced one-photon absorption from excited levels. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|