Multilayer broadband switchable absorbers based on phase-change materials
Multilayer broadband switchable absorbers based on phase-change materials
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DOI：
10.1117/12.2677847
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发表时间：
2023-10
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通讯作者：
Md. Tanvir Emrose;Emily L. Payne;Chenglong You;G. Veronis
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文献类型：
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作者：
Md. Tanvir Emrose;Emily L. Payne;Chenglong You;G. Veronis
我们介绍了多层结构的相变材料锗锑碲（GST）用作宽带可切换吸收器在红外波长范围内。我们使用一种模因优化算法，再加上传输矩阵方法来优化的多层结构的材料成分和层厚度。我们表明，在优化的结构中，通过将GST从其结晶相切换到其非晶相，可以将接近完美的吸收在宽波长范围内切换到非常低的吸收。我们的研究结果可以铺平道路，一类新的宽带可切换的吸收器和热源在红外波长范围内。
We introduce multilayer structures with the phase-change material germanium-antimony-tellurium (GST) for use as broadband switchable absorbers in the infrared wavelength range. We use a memetic optimization algorithm coupled with the transfer-matrix method to optimize both the material composition and the layer thicknesses of the multilayer structures. 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 results could pave the way to a new class of broadband switchable absorbers and thermal sources in the infrared wavelength range.