Nonlinear optical properties of a dithiooxamide determined by single beam techniques
| Autor: | Arash Gharibi, S.H. Mousavi, M.H. Majles Ara, S. Salmani, M. Rafizadeh, Ehsan Koushki |
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| Rok vydání: | 2008 |
| Předmět: |
chemistry.chemical_classification
Materials science business.industry Analytical chemistry Physics::Optics Condensed Matter Physics Nonlinear optical chemistry.chemical_compound Wavelength Optics Dithiooxamide chemistry Moire deflectometry General Materials Science Laser power scaling business Inorganic compound Refractive index Sign (mathematics) |
| Zdroj: | Materials Chemistry and Physics. 109:320-324 |
| ISSN: | 0254-0584 |
| DOI: | 10.1016/j.matchemphys.2007.11.036 |
| Popis: | The third-order nonlinear optical properties of an inorganic compound (NH 2 CSCSNH 2 ) were studied by means of single beam transmission techniques, using a continuous-wave (CW) He–Ne laser beam with a wavelength of 632.8 nm a laser power of input 6.6 mW. The magnitude and sign of the third-order nonlinear refractive index ( n 2 ) of a saturated solution of this material in water were determined by use of both the closed-aperture z-scan and the Moire deflectometry techniques. The negative sign obtained indicated that there is a self-defocusing effect in the sample. The nonlinear refractive index n 2 and the change in the refractive index (Δ n ) were in the order of 10 −7 cm 2 W −1 and 10 −5 , respectively, both having a negative sign. The nonlinear absorption coefficient β was calculated by the use of the open-aperture z-scan technique to be −1.8 × 10 −3 cm W −1 . |
| Databáze: | OpenAIRE |
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