With the integrated application of multiple detection technologies, multi-band compatible stealth is crucial to improve the counter-detection capability of targets. However, there are still significant challenges in achieving stealth that is compatible with different bands. This paper presents a wavelength-selective emitter with a structure consisting of a layer composed of a high-temperature-resistant material and a phase change material GeSbTe (GST), and an upper truncated pyramid array composed of TiO. The structure can transition between “stealthy” and “non-stealthy” states by controlling the phase transition process of the GST. The structure in stealth mode has low reflectivity in the visible (VIS) region, low emissivity in the mid-wave infrared and long-wave infrared region. In addition, it has laser stealth at 1.06 μm and 1.54 μm, and provides radiative cooling in the non-atmospheric window (5–8 μm). The dipole resonance formed by TiO on the side gives the structure lower reflectivity in the VIS band and at two laser wavelengths. The high emission in the non-atmospheric window is mainly attributed to the Fabry-Perot resonance supported in the structure. In addition, the effects of incidence angle and temperature on the stealth performance of the structure are investigated. This research has promising applications in the field of multi-band compatible stealth.

中文翻译：

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基于相变材料的协同多波段隐身

随着多种探测技术的综合应用，多频段兼容隐身对于提高目标反探测能力至关重要。然而，实现与不同频段兼容的隐身仍然存在重大挑战。本文提出了一种波长选择性发射器，其结构由耐高温材料和相变材料GeSbTe（GST）组成的层以及由TiO组成的上截棱锥阵列组成。通过控制GST的相变过程，该结构可以在“隐形”和“非隐形”状态之间转变。隐身模式下的结构在可见光（VIS）区域具有低反射率，在中波红外和长波红外区域具有低发射率。此外，它还具有1.06μm和1.54μm激光隐形能力，并在非大气窗口（5-8μm）提供辐射冷却。侧面由 TiO2 形成的偶极共振使结构在 VIS 波段和两个激光波长下具有较低的反射率。非大气窗口中的高发射主要归因于结构中支持的法布里-珀罗共振。此外，还研究了入射角和温度对结构隐身性能的影响。该研究在多频段兼容隐身领域具有广阔的应用前景。