Effects of surface diffusion on high temperature selective emitters

被引：26

作者：

Peykov, Daniel ^{[1
,2
]}

Yeng, Yi Xiang ^{[2
,3
]}

Celanovic, Ivan ^{[2
]}

Joannopoulos, John D. ^{[2
,3
]}

Schuh, Christopher A. ^{[1
,2
]}

机构：

[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[2] MIT, Inst Soldier Nanotechnol, Cambridge, MA 02139 USA

[3] MIT, Elect Res Lab, Cambridge, MA 02139 USA

来源：

OPTICS EXPRESS | 2015年 / 23卷 / 08期

关键词：

PHOTONIC CRYSTALS; THERMAL EMISSION; SELF-DIFFUSION; LATTICE-PARAMETER; ENERGY; METALS; TRANSITION; STABILITY; EVOLUTION; TUNGSTEN;

D O I：

10.1364/OE.23.009979

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Using morphological and optical simulations of 1D tantalum photonic crystals at 1200K, surface diffusion was determined to gradually reduce the efficiency of selective emitters. This was attributed to shifting resonance peaks and declining emissivity caused by changes to the cavity dimensions and the aperture width. Decreasing the structure's curvature through larger periods and smaller cavity widths, as well as generating smoother transitions in curvature through the introduction of rounded cavities, was found to alleviate this degradation. An optimized structure, that shows both high efficiency selective emissivity and resistance to surface diffusion, was presented. (C) 2015 Optical Society of America

引用

页码：9979 / 9993

页数：15

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