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18 April 2006 Radiative properties of the heated nanotips in close vicinity to the sample surface in vacuum
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Proceedings Volume 6180, Photonics, Devices, and Systems III; 618028 (2006)
Event: Photonics, Devices, and Systems III, 2005, Prague, Czech Republic
A heated probing tip of the scanning microscope being placed in close vicinity to, but not in atomically dense contact, the sample surface with smaller local temperature , may produce a very intensive microwave radiation flux onto the surface via evanescent modes of electromagnetic field. The necessary condition implies existence of overlapped absorption frequency domains both for the tip and sample materials. We consider this problem theoretically discussing several mechanisms of the heat transportation to and from the tip: a heating from the background radiation of vacuum chamber, the contact heating through the tip holder, and cooling by radiation emitted onto the surface. We have estimated the possible effects at different tip and sample materials and conclude that the largest radiation effects (at room temperature conditions) have to occur when using materials with similar dielectric properties. A construction of an oscillating microwave source is proposed using normal vibration mode of the scanning probe microscope. Numerical estimations of the output power and radiation frequency range involved are given.
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G. V. Dedkov, A. A. Kyasov, E. G. Dedkova, and R. I. Teghaev "Radiative properties of the heated nanotips in close vicinity to the sample surface in vacuum", Proc. SPIE 6180, Photonics, Devices, and Systems III, 618028 (18 April 2006);

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