Gold-bead scanning near-field optical microscope with laser-force position control.
We have developed a scanning near-field optical microscope with an optically trapped metallic particle that has a small diameter compared to the wavelength of visible light. In this microscope we employed spot illumination to enhance the intensity of light scattered from a probe particle so we could reduce the diameter of the probe particle to 40 nm. We detected slight irregularities of the surface of the cover glass near 10-nm depth. Also, we observed gold colloidal particles on the surface of the cover glass.
Sugiura
T
T
Joint Research Center for Atom Technology, Tsukuba, Ibaraki 305, Japan.
Okada
T
T
Inouye
Y
Y
Nakamura
O
O
Kawata
S
S