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首页> 外文会议>Photonics, Devices, and Systems III >Radiative properties of the heated nanotips in close vicinity to the sample surface in vacuum
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Radiative properties of the heated nanotips in close vicinity to the sample surface in vacuum

机译：真空中靠近样品表面的加热纳米尖端的辐射特性

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摘要

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.
机译：扫描显微镜的加热探针放置在局部温度较小的样品表面附近（但不是原子密集接触），可能会通过电磁场的e逝模式在表面上产生非常强烈的微波辐射通量。必要条件意味着吸头和样品材料都存在重叠的吸收频域。我们从理论上考虑了这个问题，讨论了热量往返尖端的几种机理：来自真空室背景辐射的热量，通过尖端支架的接触加热以及通过辐射到表面上的辐射进行的冷却。我们已经估计了在不同的尖端和样品材料上可能产生的影响，并得出结论，当使用具有类似介电特性的材料时，必须产生最大的辐射效应（在室温条件下）。使用扫描探针显微镜的正常振动模式，提出了一种振荡微波源的构造。给出了所涉及的输出功率和辐射频率范围的数值估计。

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