Photothermal modulation of the gap distance in scanning tunneling microscopy
- 21 July 1986
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 49 (3) , 137-139
- https://doi.org/10.1063/1.97203
Abstract
We have employed the photothermal effect to modulate the gap distance in a tunneling microscope. In this approach, optical heating induces the expansion and buckling of laser-illuminated sample surface. The surface displacement can be modulated over a wide frequency range, and its height (typically <1 Å) can be varied by changing the illumination intensity and modulation frequency. This novel method provides an alternative means for performing tunneling spectroscopy and microscopy, and for determining work functions of materials.Keywords
This publication has 6 references indexed in Scilit:
- Photothermal displacement spectroscopy: An optical probe for solids and surfacesApplied Physics A, 1983
- A novel method for the study of optical properties of surfacesSurface Science, 1983
- Surface Studies by Scanning Tunneling MicroscopyPhysical Review Letters, 1982
- Tunneling through a controllable vacuum gapApplied Physics Letters, 1982
- On the Electrical Resistance of Contacts between Solid ConductorsPhysical Review B, 1930
- Electron emission in intense electric fieldsProceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 1928