Preservation of surface features on semiconductor surfaces.

摘要

The integrity of surface structural features (e.g., distributed feedback gratings) in Group III-V compound semiconductors is preserved during heating (e.g., subsequent LPE regrowth) by a thin coating containing a transition metal (e.g., Os, Ru or Rh). DFB-DCPBH InP/InGaAsP single frequency lasers made in this way are also described.