We describe progress in blue resonant-cavity light-emitting diodes, based o
n InGaN/GaN quantum-well heterostructures. We have fabricated vertical-micr
ocavity devices in which either one or both mirrors forming the cavity are
patterned, high-reflectivity dielectrics Bragg reflectors. The results sugg
est that a blue vertical-cavity diode laser may be feasible by this approac
h. (C) 2000 American Institute of Physics. [S0003-6951(00)00338-7].