High-temperature tantalum tungsten alloy photonic crystals: Stability, optical properties, and fabrication

被引：66

作者：

Stelmakh, V. ^{[1
]}

Rinnerbauer, V. ^{[1
]}

Geil, R. D. ^{[2
]}

Aimone, P. R. ^{[3
]}

Senkevich, J. J. ^{[1
]}

Joannopoulos, J. D. ^{[1
]}

Soljacic, M. ^{[1
]}

Celanovic, I. ^{[1
]}

机构：

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

[2] Univ N Carolina, Inst Adv Mat, Chapel Hill, NC 27514 USA

[3] HC Starck Inc, Newton, MA 02461 USA

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 12期

基金：

奥地利科学基金会; 美国国家科学基金会;

关键词：

RADIATION;

D O I：

10.1063/1.4821586

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate tantalum-tungsten (Ta-W) solid solution alloy photonic crystals (PhCs) as spectrally selective components for high temperature energy conversion. The thermo-mechanical properties of the alloy are tuned by the Ta-W ratio. A 2D PhC was designed as a selective emitter, fabricated on a Ta3%W substrate, and optical properties and thermal stability were characterized. A thin layer of HfO2 was deposited for thermal stability. The PhCs show outstanding emittance selectivity, well preserved after annealing for 24h at 1200 degrees C. The structure is preserved as shown in cross-sectional images, demonstrating that the coating effectively prevents degradation due to surface diffusion at high temperatures. (C) 2013 AIP Publishing LLC.

引用

页数：4

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