K. Sreelatha, C. Venugopal, S. K. Chaudhary, N. V. Unnikrishnan: Nonlinear Luminescence in CdI<SUB>2</SUB> under Pulsed Laser Excitation

Crystal Research and Technology
Cryst. Res. Technol. 34 (1999) 897 - Abstract -

K. Sreelatha, C. Venugopal, S. K. Chaudhary*, N. V. Unnikrishnan

School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam-686 560, India
*Department of Physics, University College, Rohtak-124 001, India

Nonlinear Luminescence in CdI₂ under Pulsed Laser Excitation

Cadmium iodide has been studied from the point of view of nonlinear processes by experiments of optical amplification under two photon excitation. The two photon absorption (2PA) coefficient is determined by nonlinear transmittance technique. By means of two and three photon comparative luminescence measurements carried out using a ruby and neodymium laser, the three photon absorption (3PA) coefficient is determined. The experimental values of the absorption coefficients are compared with the predictions of the existing theories.

Keywords: cadmium iodide, optical amplification, absorption coefficients

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