摘要
本文从涨落电动力学和偶极子近似出发,推导了纳米粒子与半无限大介质在微纳米距离间的辐射换热公式,研究了间距、频率对辐射换热的影响。通过计算,我们发现近场辐射能够在与材料相关的频率上极大地强化换热。这些结果对于近场显微镜、微结构设计和局部加热技术都将会有很重要的指导作用。
Based on the fluctuation-dissipation theorem and the dipolar approximation, we derive in detail the expressions of the radiative heat power between a nanoparticle and a semi-infinite plane sample separated at distances of the order of micro/nanometer. The effects of distances and frequencies are also discussed on the radiative power. The numerical results indicate that the effect of near field can enhance greatly the heat transfer at the correlative frequencies of the material. The results should play a very important role in the near-field microscopy, in design of nanostructures and in high density storage processes by local heating.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2009年第2期279-281,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金重大国际合作研究资助项目(No.50620120442)
哈尔滨工业大学优秀青年教师培养计划资助项目(No.HITQNJS.2007.018)
关键词
涨落电动力学
纳米粒子
近场辐射
fluctuation-dissipation theorem
nanoparticle
near-field radiation
