Nano Optics Research Group

Tehrān, Iran

Nano Optics Research Group

Tehrān, Iran
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Sharifimehr M.R.,Shahid Beheshti University | Sharifimehr M.R.,Nano Optics Research Group | Ayoubi K.,Nano Optics Research Group | Mohajerani E.,Shahid Beheshti University
Optical Materials | Year: 2015

Measuring nonlinear optical response of a specific material in a mixture, not only leads to investigate the behavior of a particular component in various circumstances, but also can be a way to select suitable combination and optimum concentration of additives and therefore obtaining the maximum nonlinear optical signals. In this work, by using dual-arm Z-scan technique, the nonlinear refractive index of Disperse Red1 (DR1) organic dye molecules inside the core of prepared polymeric nanocapsules was measured among various materials which prepared nanocapsules were made of them. Then the measured value was compared with nonlinear refractive index of DR1 solved in dichloromethane. © 2015 Elsevier B.V. All rights reserved.


Sharifimehr M.R.,Shahid Beheshti University | Sharifimehr M.R.,Nano Optics Research Group | Ghanbari K.,University of Tehran | Ayoubi K.,Nano Optics Research Group | Mohajerani E.,Shahid Beheshti University
Optical Materials | Year: 2015

In order to provide necessary degree of freedom for organic dye molecules in optical applications and also for safety improvement, water insoluble Disperse Red 1 (DR1) dye molecules were placed inside the polymeric nanocapsules along with suitable surfactants and using controlled phase-separation method. TEM images were used to investigate the morphology of prepared nanocapsules. Total dye concentration for a solution consist of obtained polymeric nanocapsules was determined using decomposition of nanocapsules and a reference absorption spectrum. Absorption spectrum of a solution containing DR1 and dichloromethane was also compared with prepared nanocapsules at the same dye concentration, thereby a red-shift in absorption spectrum was detected. © 2015 Elsevier B.V. All rights reserved.

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