Intersubband optical absorption coefficients and refractive index changes in spherical quantum dots with Coshine Yukawa potential

In the effective mass framework, we have investigated the optical absorption coefficients and refractive index changes of the spherical quantum dots system with Coshine Yukawa potential. We solve the Schrödinger equation using the Nikiforov-Uvarov method to determine the wave functions and energy levels. Using the iterative method and density matrix theory, we derive analytical expressions for the optical absorption coefficients and refractive index changes. The results show that the resonance peak intensities of the coefficients depend on the potential field tuning parameters and external environmental parameters, and the peaks appear red-shifted or blueshifted as the tunable factor is adjusted. It is noteworthy that the optical response of the system is more sensitive to the structural parameters of the quantum dots than the external environmental parameters.