Optical Measurement of Ф750 mm Telescope System

Ming, 明名 Ming; Fei, 杨飞 Yang; Fuguo, 王富国 Wang; Tianyu, 吕天宇 L

doi:10.3788/gzxb20124105.0505

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“…Consequently, ZnS cannot absorb or emit IR radiation. On the other hand, the ZnS crystal has a stable lattice structure due to the ionic bonds between sulfur and zinc atoms [38]. This tight lattice structure results in strong molecular interactions [39].…”

Section: Physical Mechanismsmentioning

confidence: 99%

Metamaterial with dual stealth functions in infrared and terahertz bands

Bai,

Liu,

Tang

et al. 2024

Preprint

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In this study, an electromagnetic metamaterial with infrared (IR) passive stealth and terahertz (THz) active stealth functions is proposed. The device comprises an infrared stealth layer (IRSL) made of ZnS and SiO2, and a terahertz absorbing layer (TAL) utilizing a "graphene-SiO2-gold" sandwich-like structure. The properties of the metamaterials are investigated using the full-vector finite element method. The results indicate that the emissivity of the device is close to zero in the infrared atmospheric window (8 ~ 14 μm), with an absorption of up to 88% and a bandwidth of 2.54 THz at the center frequency of 3.98 THz. Furthermore, the device exhibited polarization insensitivity and tolerance to wide-angle incidence. These advantages make it suitable for applications in the THz radar and stealth fields.

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Section: Physical Mechanismsmentioning

confidence: 99%

Metamaterial with dual stealth functions in infrared and terahertz bands

Bai,

Liu,

Tang

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…For instance, Yang et al analyzed the aberration properties of optical systems with a large tilted and decentered refractive plate. With this theory, [4] Sun et al developed third-order aberrations of sub-aperture plane symmetric optical systems. [5] Shi et al also researched the applications of the vector aberration theory.…”

Section: Introductionmentioning

confidence: 99%