Nanophotonics, a novel optical technology, utilizes the local interaction between nanometric particles via optical near
fields. The optical near fields are the elementary surface excitations on nanometric particles. Of the variety of qualitative
innovations in optical technology realized by nanophotonics, this talk focuses on fabrication. A realization of an ultra-flat
silica surface with angstrom-scale average roughness using noadiabatic optical near-field etching and repairing are
demonstrated and its origin is discussed.