Optical properties in wurtzite InGaN staggered quantum wells

摘要

The polarization field effects on exciton states and optical properties are studied theoretically in the wurtzite (WZ) InxGa(1-x)N/InyGa(1-y)N staggered quantum wells (QWs). Numerical results show that the polarization field effects are obvious on the Stark shifts of the exciton binding energy, the oscillator strength and the emission wavelength when the well width and Indium content y increase in the symmetric staggered QWs. However, the influences of InxGa1-xN well layer are remarkable on exciton states and optical properties when the Indium concentration y is small in the asymmetric staggered QWs. In addition, the ground state linear optical susceptibility is also investigated in the WZ staggered QWs.