Abstract
We study the modulation of various nonlinear optical (NLO) properties of impurity doped quantum dot (QD) under the influence of position-dependent dielectric screening function (PDDSF) in presence and absence of noise. The NLO properties include total optical absorption coefficient (TOAC), total refractive index change (TRIC), nonlinear optical rectification (NOR), second harmonic generation (SHG), and third harmonic generation (THG). The profiles of above NLO properties have been analysed as a function of incident photon energy using both static dielectric constant (SDC) and PDDSF. Noise function assumes a Gaussian distribution and applied to the system additively as well as multiplicatively. Critical comparison among the profiles of above NLO properties using SDC and PDDSF has been conducted to realize the role of the latter. In addition, the role of mode of application of noise (additive/multiplicative) on the said profiles has also been explored. The profiles are found to display shift of peak position, amplification, diminish, and maximization of peak values under different conditions. The observations reveal subtle interplay between noise and PDDSF in tailoring the intricate features of various NLO properties and bear importance in the related field of research.
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