Effect of sodium addition and thermal annealing on second-order optical nonlinearity in thermally poled amorphous Ta2O5 thin films
| Autor: | Flavie Bondu, G. Senthil Murugan, James S. Wilkinson, Amy S. K. Tong, Marc Dussauze |
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| Přispěvatelé: | Department of Molecular, Cell and Developmental Biology (UCSC), University of California [Los Angeles] (UCLA), University of California-University of California, Institut des Sciences Moléculaires (ISM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Sodium Poling General Physics and Astronomy Second-harmonic generation chemistry.chemical_element 02 engineering and technology [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology 01 natural sciences Amorphous solid chemistry.chemical_compound chemistry Electrical resistivity and conductivity 0103 physical sciences Thermal Tantalum pentoxide Thin film Composite material 0210 nano-technology ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Journal of Applied Physics Journal of Applied Physics, American Institute of Physics, 2019, 125 (1), pp.015104. ⟨10.1063/1.5054857⟩ |
| ISSN: | 0021-8979 1089-7550 |
| Popis: | We demonstrate second-order optical nonlinearity (SON) induced in amorphous tantalum pentoxide (Ta2O5) films by thermal poling. The effects of sodium addition and thermal annealing on the efficiency and stability of second harmonic generation (SHG) have been investigated. Maker fringe analysis has been used to quantify the poling-induced SON. χ(2) of 0.46 ± 0.02 pm/V and 0.34 ± 0.02 pm/V was achieved for sodium-containing and pure Ta2O5 films, respectively. Both the strength and the temporal stability of the induced nonlinearity are discussed with respect to the poling mechanisms and measured electrical conductivity. The lower density of uncombined charges of the Ta2O5 thin films is believed to play a role in the strength of SHG signal, and the rate of SHG decay decreases with thermal annealing. |
| Databáze: | OpenAIRE |
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