Issue of spatial coherence in MQW based micro-LED simulation

In existing flip-chip LED simulations, the light extraction efficiency is related to multiple quantum well (MQW) metal reflector distance because of optical interference. We calculate contrast using several typical intensity distributions among QWs in MQW. The coherence obtained analytically. When luminosity each QW equal, ∼0, meaning incoherent, contrary traditional studies. spatial important only when emission comes from just one QW. As MQW has a not negligible thickness, single-dipole model no longer accurate.