Abstract
In this work, the quadratic electro-optic effects (QEOE) and electro-absorption (EA) process of hybrid structure consisting of metal nanoparticle (MNP) coupled to multi-layer spherical quantum dot (MSQD) are investigated numerically. The energy levels and corresponding wave functions of Schrodinger equation in the effective mass approximation are obtained using the fourth-order Runge-Kutta method. The effect of MNP in the vicinity of MSQD is calculated by considering local field enhancement. Then, the variation of QEOE and EA process of hybrid system is reported. The results show that the presence of MNP near MSQD enhances the optical nonlinearity. Also, by changing the parameters such as distance between MNP and MSQD, and radius of MNP, the variations of optical nonlinearity are studied.
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