The present invention provides a light-enhancing component and a
fabrication method thereof by using the focused-ion-beam. In the present
invention, the surface plasmon polariton structure is coated on the
surface of the optical fiber so as to form the light-enhancing component.
When the light passes through the optical fiber, the luminous flux
transmitted through the aperture on the surface plasmon polariton is
enhanced, and the light beam smaller than the diffraction limitation can
be transmitted to the far-field, i.e. the nano-optic sword is formed. The
light-enhancing component of the present invention can be used for the
optical data storage, the optical microscopy, the biomedical detections
and the lithography to perform the extra optical resolutions beyond the
diffraction limitation.