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Investigation of nitrogen plasma effect on the nonlinear optical properties of PMMA | ||
| Journal of Theoretical and Applied Physics | ||
| مقاله 11، دوره 6، شماره 1، اسفند 2012 اصل مقاله (658.39 K) | ||
| شناسه دیجیتال (DOI): 10.1186/2251-7235-6-1 | ||
| نویسندگان | ||
Davoud Dorranian  ؛ Yasaman Golian؛ Alireza Hojabri
| ||
| Physics Department, Karaj Branch, Islamic Azad University | ||
| چکیده | ||
| Abstract Effects of low power direct current nitrogen plasma on linear and nonlinear optical properties of red BS dye-doped poly(methyl methacrylate) (PMMA) film are studied employing different optical techniques. From spectrometry data, it is shown that applying plasma in such a low range of power does not affect the linear absorption coefficient, linear refractive index, and optical bandgap of this dye-doped polymer; however, nonlinear parameters are changed. Experiments are performed using the second harmonic of a continuous Nd-Yag laser beam at a 532-nm wavelength and 20-mW power. The effect of nonlinear refractive index of red BS dye-doped PMMA film in broadening the laser beam is observed. The optical bleaching behavior is investigated by measurement of the intensity of laser beam through the sample. Its third-order nonlinearity is measured using close and open Z-scan data. Nonlinear absorption coefficient and refractive index, as well as real and imaginary parts of the third-order nonlinear optical susceptibility χ3, are changed significantly due to plasma treatment. PACS: 42.65.-k: 42.65.An: 42.70.Jk: 61.41. + e: 71.35.Cc. | ||
| کلیدواژهها | ||
| Nonlinear optics؛ Refractive index؛ Nonlinear absorption؛ Z؛ scan؛ Beam broadening؛ Two؛ photon absorption؛ Optical bleaching؛ plasma | ||
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آمار تعداد مشاهده مقاله: 79 تعداد دریافت فایل اصل مقاله: 39 |
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