Journal
ADVANCED MATERIALS
Volume 32, Issue 27, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201904646
Keywords
broadband electromagnetic functionality; electromagnetic metamaterials; metastructures; metasurfaces
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Funding
- National Key R&D Program of China [2017YFA0303702]
- National Natural Science Foundation of China [11634005, 11974177, 61975078, 11674155, 11604143, 11621091]
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Electromagnetic metastructures stand for the artificial structures with a characteristic size smaller than the wavelength, which may efficiently manipulate the states of light. However, their applications are often restricted by the bandwidth of the electromagnetic response of the metastructures. It is therefore essential to reassert the principles in constructing broadband electromagnetic metastructures. Herein, after summarizing the conventional approaches for achieving broadband electromagnetic functionality, some recent developments in realizing broadband electromagnetic response by dispersion compensation, nonresonant effects, and several trade-off approaches are reviewed, followed by some perspectives for the future development of broadband metamaterials. It is anticipated that broadband metastructures will have even more substantial applications in optoelectronics, energy harvesting, and information technology.
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