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Optical limiting properties of CdS nanowires |
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| Authors: | V Sai Muthukumar CS Suchand Sandeep R Podila S Siva Sankara Sai R Philip |
| Institution: | a Sri Sathya Sai University, Prashanthinilayam, Puttaparthi 515134, India b Department of Physics and Astronomy and Center for Optical Materials Science and Engineering Technologies, Clemson University, Clemson, SC 29634, USA c Light and Matter Physics Group, Raman Research Institute, Bangalore 560080, India d Department of Physics and Astronomy, College of Charleston, Charleston, SC 29424, USA |
| Abstract: | Intensity-dependent nonlinear optical transmission studies of cadmium sulfide (CdS) nanowires (∼ 50-100 nm diameter) suspended in dimethylformamide have been carried out in the visible region using the Z-scan technique with 7 ns pulses from the second harmonic of an Nd:YAG laser. The optical limiting threshold of CdS nanowires suspension was determined to be 1.3 J cm− 2, with normalized transmittance of 0.47, which is relatively lower when compared with those of many popular metal nanowire suspensions reported in the literature. Based on an effective three-photon absorption model, nonlinear absorption and nonlinear scattering were identified as the dominant processes for the measured reduced transmittance. |
| Keywords: | CdS nanowires Pulsed laser vaporization Nonlinear optics Z-scan Optical limiting |
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