Heating effects in tip-enhanced optical microscopy
Heating effects in tip-enhanced optical microscopy
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DOI：
10.1364/oe.14.005216
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发表时间：
2006-06-12
期刊：
影响因子：
3.8
通讯作者：
Elfick, Alistair
中科院分区：
文献类型：
--
作者：
Downes, Andrew;Salter, Donald;Elfick, Alistair
介绍了扫描探针显微镜激光致热过程的有限元模拟。首先模拟了各种尖端和衬底材料以及空气和水环境的电磁场。这个电磁场，在尖端的末端和尖端下的基片，产生焦耳加热。利用该焦耳热源进行了稳态热模拟。由于尖端-衬底腔对光功率的大幅增强，预测的温升可以比没有尖端的预测值高出3个数量级以上，但光信号可以增强10个数量级以上。预计在给定温度升高时，金尖端和基板会给出最高的光信号。(c) 2006年美国光学学会。
Finite element simulations of laser-induced heating in scanning probe microscopy are presented. The electromagnetic field is first simulated for a variety of tip and substrate materials, and for air and aqueous environments. This electromagnetic field, in the end of the tip and substrate under the tip, produces Joule heating. Using this Joule heat source, steady state thermal simulations are performed. As a result of the large enhancement of optical power by the tip-substrate cavity, predicted temperature rises can be over 3 orders of magnitude higher than the values predicted without a tip present, but the optical signal can be enhanced by over 10 orders. Gold tips and substrates are predicted to give the highest optical signal for a given temperature increase. (c) 2006 Optical Society of America.