Linear and Nonlinear Optical Properties of Symmetric and Asymmetric Double Triangular Quantum Dots Withinside the Presence of Magnetic Field

Linear and third-order nonlinear optical absorption coefficients and relative refractive index changes in symmetric and asymmetric double triangular quantum dots are examined theoretically. The dependence of these optical properties on the magnetic field is examined. After calculating energies and wave functions within the effective mass and parabolic band approaches, analytical expressions of linear and nonlinear optical properties are obtained using the compact density matrix approach and iterative method. Numerical calculations are presented for typical GaAs/AlGaAs material. The results show that the magnetic field causes different effects on the pi$\pi $ and sigma +/-${{\sigma }<<^>> \pm }$ transitions. Moreover, the calculated results also reveal that the resonance frequency and nonlinear contribution are different in symmetric and asymmetric structures. As a result, it is concluded that the magnetic field plays a vital and important role in the electronic and optical properties of the system and can be used to tune the inter-subband transitions and change the corresponding optical sensitivities. Theoretical analysis is conducted on absorption coefficients and refractive index changes in double triangular quantum dots. It is investigated how temperature and pressure affect these optical characteristics. Using the compact density matrix technique and iterative method, analytical formulations of linear and nonlinear optical properties are produced after computing energies and wave functions within the effective mass and parabolic band methods. image