Infrared spectrally selective low emissivity from Ge/ZnS one-dimensional heterostructure photonic crystal

Zhang, Weigang; Xu, Guoyue; Zhang, Jianchao; Wang, Huihui; Hou, Haili

doi:10.1016/j.optmat.2014.06.023

Cited by 55 publications

(9 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Metasurfaces [ 20 ], the two-dimensional counterpart of metamaterials, provide great possibilities for the modulation of IR radiation properties and have been widely studied in IR stealth technology and other particular target electromagnetic properties. Before the emergence of the metasurface, one-dimensional photonic crystals (1D-PCs) were widely investigated for IR stealth; however, the high fabrication cost and poor stability of 1D-PCs make it difficult to be widely applied [ 21 , 22 , 23 , 24 , 25 , 26 ]. Zhu et al [ 24 ], combining silica aerogel and 1D-PCs, developed a high-temperature IR camouflage material with efficient thermal management.…”

Section: Introductionmentioning

confidence: 99%

Deep Learning Assisted Optimization of Metasurface for Multi-Band Compatible Infrared Stealth and Radiative Thermal Management

et al. 2023

View full text Add to dashboard Cite

Infrared (IR) stealth plays a vital role in the modern military field. With the continuous development of detection technology, multi-band (such as near-IR laser and middle-IR) compatible IR stealth is required. Combining rigorous coupled wave analysis (RCWA) with Deep Learning (DL), we design a Ge/Ag/Ge multilayer circular-hole metasurface capable of multi-band IR stealth. It achieves low average emissivity of 0.12 and 0.17 in the two atmospheric windows (3~5 μm and 8~14 μm), while it achieves a relatively high average emissivity of 0.61 between the two atmospheric windows (5~8 μm) for the purpose of radiative thermal management. Additionally, the metasurface has a narrow-band high absorptivity of 0.88 at the near-infrared wavelength (1.54 μm) for laser guidance. For the optimized structure, we also analyze the potential physical mechanisms. The structure we optimized is geometrically simple, which may find practical applications aided with advanced nano-fabrication techniques. Also, our work is instructive for the implementation of DL in the design and optimization of multifunctional IR stealth materials.

show abstract

Section: Introductionmentioning

confidence: 99%

Deep Learning Assisted Optimization of Metasurface for Multi-Band Compatible Infrared Stealth and Radiative Thermal Management

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The metasurface could realize high emissivity in the 5−8 μm range as well as low emissivity in the 3−5 and 8− 14 μm ranges, which satisfied both infrared suppression and radiative cooling. By utilizing an ultrathin metal film and impedance matching to tune the radiation characteristics, Zhang et al 22 successfully prepared a Ge/zinc sulfide (ZnS) one-dimensional heterostructure photonic crystal (1DHPC) via alternating thin films of Ge and ZnS on the quartz substrate. The test result showed that the average emissivity of as-prepared Ge/ZnS 1DHPC in the 3−5 and 8−14 μm ranges could be as low as 0.046 and 0.190, respectively, but the average emissivity in the 5−8 μm band could be as high as 0.579.…”

Section: ■ Introductionmentioning

confidence: 99%

Preparation of Flexible Wavelength-Selective Metasurface for Infrared Radiation Regulation

Jun

Zhan

Zhu

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Perpetual advancements in modern detection techniques have augmented the requirement of infrared camouflage; however, its development is impeded by multiband compatible regulation and curved application targets. Here, a flexible wavelength-selective metasurface based on two metal–dielectric–metal resonators is experimentally demonstrated for infrared radiation regulation with thermal management utilizing magnetic polariton. Low emissivity in atmosphere windows (infrared stealth) and high emissivity in the wavelength of 5–8 μm nonatmospheric window (radiative cooling) are simultaneously achieved. In comparison with conventional hard substrates, it is for the first time the composite wavelength–length metasurface is successfully prepared directly on a flexible polyimide film via applying polyimide double-sided tapes and S1805/LOR5A bilayer stack lift-off technology. Not only does this method successfully overcome the debonding problem of photoresist on the flexible substrate, but it also solves the bulging problem of the substrate as well as the limitation of high temperature. Besides, the temperature and infrared radiation distributions of flexible wavelength-selective metasurfaces with different curvatures are first investigated. The compared results reveal that the metasurface with larger curvature has a better infrared camouflage performance. Furthermore, the cycle stability of the flexible metasurface is tested, and the results show that the infrared radiation regulation is stable after 30 cycles with essentially no change. This study provides a guideline for preparing flexible composite metasurfaces and avoids the trouble of replacing the metal/dielectric material of the initial structure with a flexible material to improve the structure for application to curved surfaces, thus broadening implications in enhancing the effective bonding of metasurfaces to target surfaces.

show abstract

“…Welldesigned coatings, also known as photonic crystals or metafilms, can display various colors and extremely low emissivity [6,7], making them promising materials for compatible camouflage. For example, the 5-period Ge/ ZnS one-dimensional photonic crystal designed by Zhang et al [8] and the Ag/Ge based multilayer structure designed and prepared by Peng et al [9], can achieve spectral selection in the infrared band by changing the structure.…”

Section: Introductionmentioning

confidence: 99%

Metafilms for visible and infrared compatible camouflage of high-temperature targets

Zhang

Long²,

Wu³

et al. 2023

Mater. Res. Express

View full text Add to dashboard Cite

With the rapid development of multispectral detection, infrared- and visible-compatible camouflage has become necessary. Metafilms with dielectric/metal/dielectric (D/M/D) structures can be highly transparent in the visible band (380 ~ 780 nm) and highly reflective in infrared atmospheric windows (3 ~ 5 μm, 8 ~ 14 μm). The metafilm can be deposited on the equipment surface, and the high visible transmittance can make the original camouflage coating continue to achieve visible camouflage, while the low infrared emissivity can inhibit the infrared signal to achieve infrared camouflage. Compatible camouflage is urgently needed by high-temperature targets such as exhaust pipes and engine cabins. Therefore, the thermal stability of the multilayer structure is very important. In this study, a D/M/D-structured metafilm with improved thermal performance is proposed. Al-doped zinc oxide (AZO) is selected as the material of the dielectric layers due to its good thermal stability, and high visible transmittance is realized through the mechanism of admittance matching. Ag is selected as the material of the metal layer to increase infrared reflectance. A metafilm with the structure of AZO/Ag/AZO is rigorously designed and fabricated. The results from the Fourier transform infrared spectrometer and spectrophotometer show that the integrated visible transmittance and infrared emissivity at room temperature are higher than 0.87 and lower than 0.05, respectively. The camouflage performance of the metafilm is demonstrated on a flexible polyethylene terephthalate (PET) substrate. The camouflage performance of metafilm samples at 20~140℃ is tested on a model cabin. The metafilm does not affect the original camouflage coating, so it can achieve visible camouflage. The radiation temperature of the metafilm is approximately 80℃ lower than that of the control surface, and the infrared signature is significantly attenuated. To further investigate the thermal stability and thermal fatigue resistance of the metafilm, metafilm deposited on a quartz substrate is continuously heated and periodically heated at different temperatures. The sample can withstand continuous heating at 450℃ for 4 hours or repeated heating for 20 cycles. SEM (scanning electron microscope) and EDS (energy dispersive spectrometer) scanning shows that if heated at higher temperature or for more cycles, the AZO layer becomes blocky, and the proportion of Ag and O changes significantly. This leads to a decrease in the visible transmittance and an increase in the infrared emissivity of the samples.

show abstract

Infrared spectrally selective low emissivity from Ge/ZnS one-dimensional heterostructure photonic crystal

Cited by 55 publications

References 17 publications

Deep Learning Assisted Optimization of Metasurface for Multi-Band Compatible Infrared Stealth and Radiative Thermal Management

Deep Learning Assisted Optimization of Metasurface for Multi-Band Compatible Infrared Stealth and Radiative Thermal Management

Preparation of Flexible Wavelength-Selective Metasurface for Infrared Radiation Regulation

Metafilms for visible and infrared compatible camouflage of high-temperature targets

Contact Info

Product

Resources

About