Simultaneous effects of optical intensity and magnetic field on optical properties of GaN/AlN multi-wells quantum rings with constant outer radius

< p>Here, we study the effect of the optical intensity, external magnetic field, well numberand quantum ring thicknesses on the optical absorption of AlN/GaN constant radiusmulti-wells quantum rings. We show that when the intensity increases, the totalabsorption coefficient reduces. This fact is independent of the inner quantum ringradius Rin, magnetic field, and number of wells. The total absorption coefficientreduces monotonically when the number of wells increases. However, the system withRin=۴۰۰ Å at zero magnetic field is an exception. In this system, if the number ofwells increases, the total absorption coefficient firstly decreases and then increases.By increasing Rin, the total absorption coefficient monotonically reduces. Thismonotonic decreasing behavior exists for systems with more number of wells andhigher magnetic fields. At fixed Rin and for systems with greater number of wells andhigher values Rin, the total absorption coefficient monotonically decreases when themagnetic field increases. Finally, at lower magnetic fields, the total absorptioncoefficient decreases more rapidly than in higher magnetic fields.

Keywords:

Fixed radius multi-wells quantum rings , optical absorption coefficients , Optical intensity , Magnetic field