Interband polarized absorption in InP polytypic superlattices

摘要: Recent advances in growth techniques have allowed the fabrication of semiconductor nanostructures with mixed wurtzite/zinc-blende crystal phases. Although optical characterization these polytypic structures is well reported literature, a deeper theoretical understanding how phase mixing and quantum confinement change output linear light polarization still needed. In this paper, we theoretically investigate effects wurtzite zinc-blende phases on interband absorption degree an InP superlattice. We use single 8 × 8 k⋅p Hamiltonian that describes both Quantum investigated by changing size unit cell. also include effect due to dielectric mismatch between superlattice vaccum show it be necessary match experimental results. Our calculations for large concentrations small explain trends recent photoluminescence excitation measurements. Furthermore, find high sensitivity polarization. This can reduced increasing confinement. conclusion, our analysis provides explanation superlattices, shows interplay area worth exploring engineering.