Alloyed CdSe_0.3Te_0.7nanocrystals (NCs) were prepared by a thermochemical method using Thioglycolic acid (TGA) as a capping agent molecule. X-ray diffraction (XRD) and Transmission electron microscopy (TEM) analysis demonstrated hexagonal phase NCs with an average size of around 2.5 nm. Synthesized NCs indicated a narrow band emission with a peak located at 561 nm. Nonlinear optical (NLO) properties of the CdSe_0.3Te_0.7NCs have been investigated by z-scan technique using Continuum Wave He–Ne laser. The nonlinear absorption coefficient and nonlinear refraction index were obtained in the order of 10^-2 and 10^-8, respectively. The results revealed that these NCs exhibit strong NLO properties effects such as self-defocusing and two photons absorption.

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References

M. W. Porambo and A. L. Marsh, J. Opt. Mater. 31, 1631 (2009), DOI: 10.1016/j.optmat.2009.03.013. Web of Science, Google Scholar
W. Q. Penget al., J. Cryst. Growth 279, 454 (2005), DOI: 10.1016/j.jcrysgro.2005.02.066. Web of Science, Google Scholar
X. H. Zhonget al., J. Am. Chem. Soc. 125, 8589 (2003), DOI: 10.1021/ja035096m. Web of Science, Google Scholar
M. Molaeiet al., Synth. React. Inorg. M. 44, 257 (2014), DOI: 10.1080/15533174.2013.770024. Google Scholar
M. Samadpouret al., J. Bisquert. 129, 14400 (2011). Google Scholar
M. Tomasulo, I. Yildiz and M. Raymo, J. Phys. Chem. B. 3, 3853 (2006). Google Scholar
M. L. Steigerwald and L. E. Brus, J. Acc. Chem. Res. 23, 183 (1990), DOI: 10.1021/ar00174a003. Web of Science, Google Scholar
T. Trindade, J. Chem. Mater. 13, 3843 (2001), DOI: 10.1021/cm000843p. Web of Science, Google Scholar
Y. Zheng, Z. Yang and J. Y. Ying, J. Adv. Mater. 19, 1475 (2007), DOI: 10.1002/adma.200601939. Web of Science, Google Scholar
X. Zhonget al., J. Am. Chem. Soc. 125, 13559 (2003), DOI: 10.1021/ja036683a. Web of Science, Google Scholar
X. Zhonget al., J. Phys. Chem. B 108, 15552 (2004), DOI: 10.1021/jp048071y. Web of Science, Google Scholar
B. J. Rudreshaet al., Chem. Phys. Lett. 542, 159 (2012), DOI: 10.1016/j.cplett.2012.06.022. Web of Science, Google Scholar
J. J. Thomaset al., Mater. Res. Bull. 47, 1855 (2012), DOI: 10.1016/j.materresbull.2012.04.067. Web of Science, Google Scholar
A. Karatayet al., Opt. Commun. 285, 1471 (2012), DOI: 10.1016/j.optcom.2011.11.088. Web of Science, Google Scholar
H. P. Klong and L. F. Alexander , X-ray Diffraction Procedures for Crystalline and Amorphous Materials ( Wiley , New York , 1954 ) . Google Scholar
M. H. Majles Ara, Z. Dehghani and S. SaievarIranizad, J. Mod. Phys. B 22, 3165 (2008). Web of Science, Google Scholar
K. Milanchianet al., J. Opt. Mater. 32, 12 (2009), DOI: 10.1016/j.optmat.2009.05.011. Web of Science, Google Scholar
Z. Dehghaniet al., J. Phys. Chem. Solids. 72, 1008 (2011), DOI: 10.1016/j.jpcs.2011.05.005. Web of Science, Google Scholar
S. Nazerdeylamiet al., J. Physica B. 406, 108 (2011), DOI: 10.1016/j.physb.2010.10.033. Web of Science, Google Scholar
N. Liuet al., J. Opt. Commun. 176, 239 (2000), DOI: 10.1016/S0030-4018(00)00501-0. Web of Science, Google Scholar
M. Sheik-Bahaeet al., IEEE J. Quantum Electron. QE 26, 760 (1990), DOI: 10.1109/3.53394. Web of Science, Google Scholar
M. H. MajlesAraet al., J. Quant. Spectrosc. Radiat. Transf. 113, 366 (2012). Web of Science, Google Scholar
Y. Chenget al., J. Opt. Commun. 282, 4271 (2009), DOI: 10.1016/j.optcom.2009.07.038. Web of Science, Google Scholar
Z. Chenet al., J. Photochem. Photobiolo. A: Chem. 206, 213 (2009), DOI: 10.1016/j.jphotochem.2009.07.005. Web of Science, Google Scholar