The nonlinear refraction and absorption dependence on the thermal effect for 4 ns pulse duration in binuclear Zn(II) phthalocyanine solution

Yuksek M., Ceyhan T., BAĞCI F., Yalioglu H. G., ELMALI A., Bekaroglu O.

OPTICS COMMUNICATIONS, vol.281, no.14, pp.3897-3901, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 281 Issue: 14
  • Publication Date: 2008
  • Doi Number: 10.1016/j.optcom.2008.03.034
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3897-3901
  • Istanbul Technical University Affiliated: Yes


The influence of thermal effect on the third-order nonlinear optical properties of binuclear Zn(II) phthalocyanine in chloroform solution was studied. The nonlinear refraction and absorption of the sample was measured by using Z-scan technique with 4 ns laser pulses at 532 nm wavelength. The opposite signs of the effective nonlinear refraction index were observed by changing the focal length of focusing lens from 10 cm to 20 cm in the experimental setup. Changing the focusing lens increased the beam waist radius from 7 mu m to 20 mu m. The nonlinear absorption coefficient was reduced about 200 times based on changing the fluence or beam waist radius. The drastic changes in the third-order nonlinear optical parameters were attributed to thermal effect. To investigate the role of thermal effects even further the effective nonlinear refraction and absorption coefficients were studied by using different repetition rates, input powers and concentrations. (C) 2008 Elsevier B.V. All rights reserved.