This paper deals with the dependence of second order nonlinear susceptibility and second harmonic generation (SHG) efficiency on the shape of CdS quantum dot. A relation has been found between the electronic structure and second order nonlinear susceptibility. The effective mass approximation has been used to find the energy levels. We have considered both intra band and inter band near resonant transitions for SHG and theoretically investigated the SHG efficiency for different shapes of CdS quantum dot inspired by experiments conducted previously by Aktsipitrov (1995).
Key words: Second order nonlinear susceptibility; intraband transition, interband transition, SHG efficiency
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