in this paper a novel design of all-optical half-subtractor based on nonlinear directional coupler is proposed. by using four waveguides and appropriately adjusting the refractive indices and selecting the proper length of waveguides, halfsubtractor function can be obtained. the operation of this function is simulated by rsoft cad-layout (beamprop) simulator. the simulation results confirm the ...

The nonlinear optical response of organic polaritonic matter has received increasing attention due to their enhanced and controllable potential for novel devices such as compact photon sources quantum information devices. Using z-scans at different wavelengths incident powers we have studied the dispersion ultrastrongly coupled cavity polaritons near lower polariton band. We show that up 150-fo...

In this paper, the effect of pressure, temperature and impurity on the energylevels, binding energy, linear and nonlinear optical properties of a modified Gaussianquantum dot are studied. In this regard, the finite element method is employed to solvethe single electron Schrodinger equation in the effective mass approximation with andwithout impurity at the center of the dot. In addition, the en...