Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1590808 | Science and Technology of Advanced Materials | 2007 | 5 Pages |
Abstract
Step and terrace structure has been observed in an area of 1 μmÃ1 μm on the cleaved surface of KCl-KBr solid-solution single crystal by scanning near-field optical microscope (SNOM) with a small sphere probe of 500 nm diameter. Lateral spatial resolution of the SNOM system was estimated to be 20 nm from the observation of step width and the scanning-step interval. Vertical spatial resolution was estimated to be 5-2 nm from the observation of step height and noise level of photomultiplier tube (PMT). With applying a dielectric dipole radiation model to the probe surface, the reason why such a high spatial resolution was obtained in spite of the 500 nm sphere probe, was understood as the effect of the near-field term appeared in the radiation field equations.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Yasushi Oshikane, Toshihiko Kataoka, Mitsuru Okuda, Seiji Hara, Haruyuki Inoue, Motohiro Nakano,