Light emitting semiconductor junctions are disclosed. An exemplary light emitting junction has a first electrical contact coupled to a first side of the junction. The exemplary junction also has a second electrical contact coupled to a second side of the junction. The exemplary junction also has a region of set straining material that exerts a strain on the junction and alters both: (i) an optical polarization, and (ii) an emission wavelength of the junction. The region of set straining material is not on a current path between said first electrical contact and said second electrical contact. The region of set straining material covers a third side and a fourth side of the light emitting junction along a cross section of the light emitting junction. The light emitting semiconductor junction device comprises a three-five alloy.