کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5429972 | 1508704 | 2010 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Radiative heat transfer at nanoscale: Closed-form expression for silicon at different doping levels Radiative heat transfer at nanoscale: Closed-form expression for silicon at different doping levels](/preview/png/5429972.png)
Radiative heat transfer at the nanoscale is becoming an important technological issue with the development of nano electromechanical systems (NEMS). In this article, we derive asymptotic expressions to compute near-field radiative heat transfer between two planes of silicon. We identify two physical mechanisms that give the dominant contribution at small gaps. For intrinsic and low-doped silicon, the main contribution is due to evanescent waves coming from propagating waves undergoing frustrated total internal reflections at the interfaces. For doping levels larger than Ne=1016Â cmâ3 surface mode coupling contributes to the heat transfer. Asymptotic expressions are also given in that case. In all cases, we compare analytical formulas with exact numerical calculations when varying the temperature and the doping concentration. We also give their range of validity.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 111, Issues 7â8, May 2010, Pages 1005-1014