Carrier confinement versus photonic confinement
= Carrier confinement versus photonic confinement
Carrier confinement quantizes electronic and hole states and changes transition energies, <joint density of states> and envelope overlaps. A <waveguide> or cavity confines electromagnetic <modes> and changes optical overlap, resonances or emission rates. Both can occur in a <semiconductor> light source, but a small electronic island is not automatically a designed <optical cavity>.