Gold-bead scanning near-field optical microscope with laser-force position control
- 15 November 1997
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 22 (22), 1663-1665
- https://doi.org/10.1364/ol.22.001663
Abstract
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.Keywords
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