Optical properties of a single quantum well with Pöschl–Teller confinement potential

Abstract

In this work, using the compact density matrix approach and iterative procedure, the effects of the two asymmetry parameters of the Pöschl-Teller quantum well (QW) on the nonlinear optical rectification (NOR), second harmonic generation (SHG), third harmonic generation (THG), inter-subband optical absorption coefficient (IOAC), and refractive index change (RIC) are studied. Numerical results reveal that the two asymmetry parameters ν and μ of the Pöschl-Teller QW have a great influence on the NOR, SHG, THG, IOACs, and RICs. The maximum asymmetry of the Pöschl-Teller confinement potential can be gotten by an optimized set of two ν and μ asymmetry parameters. If it is desired to obtain the NOR, SHG, THG, and total RIC (IOAC) with larger values, then a relatively small (large) value of μ / ν should be employed. Significant high-order nonlinear can be obtained via a correct choice of the set of the two asymmetry parameters. The results of our study show that the Pöschl-Teller QW is a promising candidate for optoelectronic device applications. • The asymmetry parameters ( ν and μ ) of the Pöschl-Teller QW have great influences on the NOR, SHG, THG, ACs, and RICs. • The maximum asymmetry of the Pöschl-Teller confinement potential can be gotten by an optimized set of ν and μ . • If it is desired to obtain the NOR, SHG, THG, and total RIC (IOAC) with larger values, then a relatively small (large) value of ν and μ should be employed. • Significant high-order nonlinear can be obtained via a correct choice of the set of ν and μ . • The results of our study show that the Pöschl-Teller QW is a promising candidate for optoelectronic device applications.