Less well known than the potentials from which they are derived, fields are nevertheless essential for understanding (and controlling) many physical phenomena.
Singular nano-geometries make it possible to locally exalt these fields. Thus, we can develop, study and use extremely bright sources of particle waves (electrons, ions, neutrals, photons, etc.). According to our concerns, these sources make it possible to highlight and better understand the key role of the field, to manufacture a wave front to illuminate and study an object, as well as to feed demanding applications in terms of brightness.
