Narrowband Polaritonic Thermal Emitters Driven by Waste Heat
Narrowband Polaritonic Thermal Emitters Driven by Waste Heat
复制标题
废热驱动的窄带极化热发射器
作者：
Guanyu Lu;J. Nolen;T. Folland;M. Tadjer;D. G. Walker;J. Caldwell
窄带长波红外（LWIR）光源有着广泛的应用，特别是在8-12 μm大气窗口内。这些技术包括红外信标、自由空间通信、光谱学和潜在的片上光子学。不幸的是，商业发光二极管（LED）的来源是不可用的长波红外线，只留下气相和量子级联激光器，表现出低的壁插效率，在许多情况下需要大的足迹，排除了它们的使用，为许多应用。纳米光子学的最新进展已经证明了将热发射定制成类似LED的响应的潜力，其特征在于窄带偏振热发射器。在这项工作中，我们证明了这种纳米光子红外发射超材料（NIREM），具有接近统一的吸收，可以作为LWIR源，有效地没有净功耗，使他们的操作完全由传统电子设备的废热。使用实验发射率光谱从SiC NIREM设备与热力学紧凑型模型相结合，我们验证了这种可行性的两个测试案例：一个NIREM设备驱动的废热从CPU散热器和一个操作使用低功率电阻加热器的高温操作。为了验证这些计算，我们实验确定的温度依赖的NIREM辐照度和角辐射图案。我们声称，这些结果提供了第一个概念验证的废热驱动的热发射器可能采用在各种红外应用空间。
There are a broad range of applications for narrowband long-wave infrared (LWIR) sources, especially within the 8–12 μm atmospheric window. These include infrared beacons, free-space communications, spectroscopy, and potentially on-chip photonics. Unfortunately, commercial light-emitting diode (LED) sources are not available within the LWIR, leaving only gas-phase and quantum cascade lasers, which exhibit low wall-plug efficiencies and in many cases require large footprints, precluding their use for many applications. Recent advances in nanophotonics have demonstrated the potential for tailoring thermal emission into an LED-like response, featuring narrowband, polarized thermal emitters. In this work, we demonstrate that such nanophotonic IR emitting metamaterials (NIREMs), featuring near-unity absorption, can serve as LWIR sources with effectively no net power consumption, enabling their operation entirely by waste heat from conventional electronics. Using experimental emissivity spectra from a SiC NIREM device in concert with a thermodynamic compact model, we verify this feasibility for two test cases: a NIREM device driven by waste heat from a CPU heat sink and one operating using a low-power resistive heater for elevated temperature operation. To validate these calculations, we experimentally determine the temperature-dependent NIREM irradiance and the angular radiation pattern. We purport that these results provide a first proof-of-concept for waste heat-driven thermal emitters potentially employable in a variety of infrared application spaces.
影响因子：
7
作者：
Chen, Yiguo;Francescato, Yan;Maier, Stefan A.
通讯作者：
Maier, Stefan A.
影响因子：
3.2
作者：
Folland, T. G.;Nordin, L.;Caldwell, J. D.
通讯作者：
Caldwell, J. D.