2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/89323An entanglement-preserving photo-detector converts photon polarization to electron spin. Up and down spin must respond equally to oppositely polarized photons, creating a requirement for degenerate spin energies, ge=0 for electrons. We present a plot of ge-factor versus lattice constant, analogous to bandgap versus lattice constant, that can be used for g-factor engineering of III-V alloys and quantum wells2 pages, 1 figure, v2:caption style was correctedQuantum Physicstext