In the present paper the excitonic effects on the optical properties of semispherical quantum dots are investigated. By considering semi parabolic confining potential, the energy eigenvalues and corresponding eigenfunctions are calculated by finite element method in the effective mass approximation. The second order optical rectification (OR) and second harmonic generation (SHG) are investigated by density matrix approach. The results show that excitonic effects have a great influence on the maximum values of the OR and SHG and cause a blue shift in OR and SHG. In addition, SHG is always weaker than OR. Ultimately, by calculating the oscillator strength it is shown that the degeneracy of the excited state has appreciable effects on the results.

Keywords: : Excitonic effects, Oscillator strength, Second harmonic generation, Second order optical rectification, Semispherical quantum dot.

Full-Text [PDF 264 kb]   (1235 Downloads)