ITO-based metamaterials for polarization-independent wide-angle mid-infrared thermal radiation. (September 2022)

• Record Type: Journal Article
• Authors: Dong, Chao; Zheng, Yun; Shen, Kesheng; Liu, Hongchao; Zhang, Jun; Xia, Shiqiang; Zhang, Xianzhou; Liu, Yufang; Lu, Hai
• Is Part Of: Case studies in thermal engineering. Volume 37(2022)
• Publication Date: 2022-09
• Subjects: Quasi-periodic metamaterials -- Non-metallic -- Thermal emitter -- High temperature thermal stability; Heat engineering -- Case studies -- Periodicals; 621.40205
• DOI: 10.1016/j.csite.2022.102278
• Languages: English
• ISSNs: 2214-157X

Abstract

Abstract: The realization of mid-infrared thermal radiation based on metamaterials insensitive to angle and polarization plays an important role in various thermal photonic applications. However, the challenges include the following: most previously designed thermal emitters usually contain metal components with unsatisfied physicochemical stability, accompanied with complex manufacturing technology. The present study proposes a mid-infrared thermal emitter at 3–6 μm wavelength range based on Fibonacci quasi-periodic structure, and a flat one-dimensional structure based on Fibonacci geometry resorting to ITO is designed. The proposed thermal emitter is, theoretically and experimentally, proven to possess good angular and polarization-independent selective thermal emission performance in a relatively wide infrared wavelength range. Furthermore, the good optical and high-temperature thermal stability of the designed thermal emitter is verified in the present experimental research. The thermal emitters proposed have advantages in polarization-independence without scale restraint and low cost but with wide vision. In summary, the present study provides a new tactics for obtaining non-metal spectral selective thermal emitters in a relatively wide wavelength range and thermal photonic applications under harsh conditions.