Issue 98, 2015
From the journal:

RSC Advances

Nonlinear optical interactions of Co: ZnO nanoparticles in continuous and pulsed mode of operations†

Rajeswari Ponnusamy,a   Dhanuskodi Sivasubramanian,*a   P. Sreekanth,b   Vinitha Gandhiraj,c   Reji Philipb  and  G. M. Bhaleraod  

* Corresponding authors

a Nonlinear Optical Materials Laboratory, School of Physics, Bharathidasan University, Tiruchirappalli – 620 024, India
E-mail: dhanus2k3@yahoo.com

b Light and Matter Physics Group, Raman Research Institute, C.V. Raman Avenue, Sadashivanagar, Bangalore-560080, India

c School of Advanced Sciences, Vellore Institute of Technology, Chennai-600 127, India

d UGC-DAE Consortium for Scientific Research, Kalpakkam node, Kokilamedu-603104, India

Abstract

Nanoparticles of Co: ZnO were synthesized by a co-precipitation method and characterized structurally by XRD (wurtzite), FTIR and TEM (spherical, 6–13 nm). The oxidation state of the Co ions is confirmed as +2 from electron paramagnetic resonance (EPR). UV-Vis absorption spectra represent a complete transparency in the visible region. A zinc vacancy is identified by PL measurements at 410 and 465 nm. The intensity dependent third order nonlinearity is studied using two frequency doubled (532 nm) pumping sources namely nanosecond pulsed Nd: YAG and CW Nd: YAG lasers. The nonlinear optical coefficients are obtained by analyzing the z-scan curve on the basis of a thermal lensing model for CW excitation whereas two photon absorption (2PA) along with a absorption saturation process for ns excitation.

Graphical abstract: Nonlinear optical interactions of Co: ZnO nanoparticles in continuous and pulsed mode of operations

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Article information

DOI
https://doi.org/10.1039/C5RA10756C
Article type
Paper
Submitted
06 Jun 2015
Accepted
14 Sep 2015
First published
15 Sep 2015

RSC Adv., 2015,5, 80756-80765

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Nonlinear optical interactions of Co: ZnO nanoparticles in continuous and pulsed mode of operations

R. Ponnusamy, D. Sivasubramanian, P. Sreekanth, V. Gandhiraj, R. Philip and G. M. Bhalerao, RSC Adv., 2015, 5, 80756 DOI: 10.1039/C5RA10756C

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