Two and four photon absorption and nonlinear refraction in undoped,chromium doped and copper doped ZnS quantum dots |
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| Institution: | 1. Department of Physics, Deenbandhu Chhotu Ram University of Science and Technology, Murthal, Sonipat 131001, India;2. Department of Physics, Hindu P.G. College, Sonipat 131001, India;1. Department of Chemistry, M.D. University, Rohtak, Haryana, India;2. Department of Chemistry, Hindu College, Sonepat, Haryana, India;1. Department of Engineering Physics, Faculty of Engineering, Ankara University, 06100, Be?evler, Ankara, Turkey;2. Hasan Kalyoncu University, Faculty of Health Sciences, Department of Nutrition and Dietetics, Gaziantep, Turkey;3. Iskenderun Tech Univ, Fac Engn & Nat Sci, Dept Elect Elect Engn, TR-31200, Iskenderun, Hatay, Turkey;4. Pamukkale University, Faculty of Engineering, Department of Chemical Engineering, Denizli, Turkey;1. School of Pure & Applied Physics, Mahatma Gandhi University, Kottayam 686560, India;2. Raman Research Institute, C.V. Raman Avenue, Sadashivanagar, Bangalore 560080, India;1. School of Pure & Applied Physics, Mahatma Gandhi University, Kottayam 686560, India;2. Light and Matter Physics Group, Raman Research Institute, C.V. Raman Avenue, Sadashivanagar, Bangalore 560080, India;1. School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam, Kerala 686562, India;2. Optics group, Raman Research Institute, C.V. Raman Avenue, Bangalore 560080, India |
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| Abstract: | The ZnS quantum dots (QDs) with Cr and Cu doping were synthesized by chemical co-precipitation method. The nanostructures of the prepared undoped and doped ZnS QDs were characterized by UV–vis spectroscopy, Transmission electron microscopy (TEM) and X-ray diffraction (XRD). The sizes of QDs were found to be within 3–5 nm range. The nonlinear parameters viz. Two photon absorption coefficient (β2), nonlinear refractive index (n2), third order nonlinear susceptibility (χ3) at wavelength 532 nm and Four photon absorption coefficient (β4) at wavelength 1064 nm have been calculated by Z-scan technique using nanosecond Nd:YAG laser in undoped, Cr doped and Cu doped ZnS QDs. Higher values of nonlinear parameters for doped ZnS infer that they are potential material for the development of photonics devices and sensor protection applications. |
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| Keywords: | Nanostructures Chemical synthesis X-Ray Diffraction Optical properties |
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