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This Defense Intelligence Reference Document from the Defense Intelligence Agency, dated 6 April 2010, reviews electromagnetic and optical metamaterials for aerospace use. It was produced in FY 2009 under the Advanced Aerospace Weapon System Applications (AAWSA) Program. The report covers super-lenses and hyper-lenses for imaging objects smaller than the diffraction limit, slowing light to shrink components, energy-harvesting absorbers, and one-way chiral devices. It concludes that metamaterials matter for aerospace because they allow smaller, lighter components.
“The Advance”11 pages
UNCLASSIFIEDJ,UiOP OFFJCJ0P 1155 ON1¥ One possible design for the microwave frequency band is shown in Figure 17. High absorption is accomplished by reducing reflections to zero. This is accomplished by choosing metamaterials parameters such that c11 (cu,.) = μ,11 (mr) at the resonant frequency .:=,1=-1 +i .., L=200nm,e=it=-1 +I ! 00 tt,i:leg 10 20 30 40 X .l I 'I I e,.~-~ r ! l/I Figure 19. Wide-Angle Pla11monic Absorber Based on Negative Index Metamaterial. Right panel: schematic of an absorption-measuring experiment. A generic metamaterial with Ii_-:,· = μ.::. = -1 + i, μ_u = 1is assumed. Left panel: angular dependence of the absorption for a generic and specific (shown in the inset) metamaterlal. Both exhibit wide-angle absorptivity. (Reference 20) This fact can be expressed by a simple formula for the absorption coefficient A (Reference 20): 21 UNCLASSIFIED/,,." err1e1i\t U91!! 9NL I
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Report, from the dia collection. The PDF is mirrored here; the original link is above. 27 pages are in the text index: search them above, or from the library's search.