Wavelength-selective nanoantenna emitters have attracted considerable attention due to their widespread applications ranging from thermal radiation management to thermophotovoltaics. In this paper, we design a wavelength-selective nanoantenna emitter based on the excitation of gap-surface plasmon modes using a metal–insulator–metal configuration (silicon dioxide (SiO₂) sandwiched between silver (Ag) layers) for satisfying multiple infrared applications. The proposed design, which is called design I, realizes triple narrowband perfect absorptions at the resonance wavelengths of , , and , which perfectly match the atmospheric absorption bands while maintaining relatively low emissivity in the atmospheric transparency windows of and . Later, the functionality of design I is extended, which is called design II, to include a broadband absorption at the near-infrared region to minimize the solar irradiation reflection from the nanoantenna emitter. Finally, single- and three-layer graphene are introduced to provide a real-time tuning of the infrared signature of the proposed nanoantenna emitter (design II). It is also demonstrated that the three-layer graphene structure can suppress an undesired absorption resonance wavelength related to the intrinsic vibrational modes (optical phonons) of the SiO₂ layer by compared to for the single-layer one. The spectral analysis of design I is validated using both analytical and numerical approaches where the numerical simulation domain is extended for the analysis of design II. The thermal characteristic analyses of design I and design II (without/with graphene layers) reveal that infrared signatures of the blackbody radiation are significantly reduced for the whole wavelength spectrum at least by and within a wide temperature ranging from room temperature to , respectively.

波长选择性纳米天线发射器因其从热辐射管理到热光伏的广泛应用而引起了相当大的关注。在本文中，我们设计了一种基于间隙表面等离子体模式激发的波长选择性纳米天线发射器，使用金属 - 绝缘体 - 金属配置（二氧化硅（SiO ₂）夹在银（Ag）层之间），以满足多种红外应用. 所提出的设计，这就是所谓的设计我，实现三重窄带完美吸收在共振波长，和，这完全符合大气中吸收频带，同时保持相对较低的发射率的大气透明度的窗口和. 后来，设计 I 的功能被扩展，称为设计 II，包括在近红外区域的宽带吸收，以最大限度地减少来自纳米天线发射器的太阳辐射反射。最后，引入单层和三层石墨烯以实时调整所提出的纳米天线发射器（设计 II）的红外特征。还证明了三层石墨烯结构可以抑制与 SiO ₂层的固有振动模式（光学声子）相关的不需要的吸收共振波长，与对于单层。设计 I 的频谱分析使用解析和数值方法进行验证，其中数值模拟域扩展到设计 II 的分析。设计的热特性分析I和II设计（无/有石墨烯层）揭示了黑体辐射的红外线的签名是针对整个波长谱至少由显著降低和很宽的温度范围从室温到内，分别。