Broadband switchable infrared absorbers using phase-change materials

IF 2.8 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Express Pub Date : 2024-02-02 DOI:10.1364/ome.509650

Md Tanvir Emrose, Emily L. Payne, Chenglong You, and Georgios Veronis

引用次数: 0

Abstract

We introduce multilayer structures with the phase-change material Ge₂Sb₂Te₅ (GST) for use as broadband switchable absorbers in the infrared wavelength range. We optimize both the material composition and the layer thicknesses of the multilayer structures, in order to maximize the difference between the absorption for GST in its crystalline phase and the absorption for GST in its amorphous phase in the wavelength range of interest. We show that in the optimized structures near perfect absorption can be switched to very low absorption in a broad wavelength range by switching GST from its crystalline to its amorphous phase. Our optimized lithography-free structures have better performance than harder-to-fabricate three-dimensional structures. Our results could pave the way to a new class of broadband switchable absorbers and thermal sources in the infrared wavelength range.

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使用相变材料的宽带可切换红外线吸收器

我们介绍了含有相变材料 Ge2Sb2Te5（GST）的多层结构，可用作红外波长范围内的宽带可切换吸收器。我们对多层结构的材料成分和层厚度进行了优化，以便在相关波长范围内最大限度地提高晶相 GST 吸收率和非晶相 GST 吸收率之间的差异。我们的研究表明，在优化的结构中，通过将 GST 从结晶相切换到非晶相，可以在很宽的波长范围内将近乎完美的吸收切换为极低的吸收。与较难制造的三维结构相比，我们的优化免光刻结构具有更好的性能。我们的研究成果将为在红外波长范围内开发新型宽带可切换吸收体和热源铺平道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optical Materials Express MATERIALS SCIENCE, MULTIDISCIPLINARY-OPTICS

CiteScore

5.50

自引率

3.60%

发文量

377

审稿时长

1.5 months

期刊介绍： The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optical Materials Express (OMEx), OSA''s open-access, rapid-review journal, primarily emphasizes advances in both conventional and novel optical materials, their properties, theory and modeling, synthesis and fabrication approaches for optics and photonics; how such materials contribute to novel optical behavior; and how they enable new or improved optical devices. The journal covers a full range of topics, including, but not limited to: Artificially engineered optical structures Biomaterials Optical detector materials Optical storage media Materials for integrated optics Nonlinear optical materials Laser materials Metamaterials Nanomaterials Organics and polymers Soft materials IR materials Materials for fiber optics Hybrid technologies Materials for quantum photonics Optical Materials Express considers original research articles, feature issue contributions, invited reviews, and comments on published articles. The Journal also publishes occasional short, timely opinion articles from experts and thought-leaders in the field on current or emerging topic areas that are generating significant interest.