Calculation of the temperature and thermal expansion of a STM tip heated by a short laser pulse

被引：12
|
作者：
Geshev, PI
Klein, S
Dickmann, K
机构：
[1] FH Munster, FB Phys Tech, Laserzentrum, D-48565 Steinfurt, Germany
[2] Russian Acad Sci, Inst Thermophys, Novosibirsk 630090, Russia
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2003年 / 76卷 / 03期
关键词：
D O I：
10.1007/s00340-003-1096-8
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A mathematical model for the calculation of the temperature field in a scanning tunneling microscope (STM) tip under laser illumination is developed. The duration of the laser pulse is a few nanoseconds or shorter. A Gaussian distribution of the laser light intensity in time and space is assumed. Two different mechanisms of tip heating are taken into account: 1. due to an enhanced electric field on the tip; 2. due to heating of the side surface of the tip by the focused spot of laser light. An average tip temperature is calculated using the heat conductivity equation. The enhanced electric field on the tip is calculated by the method of boundary integral equations.
引用
收藏
页码：313 / 317
页数：5
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