摘要
Inthispaper,anultrathinmetalenshasbeenproposedbasedonaholographicmetasurfacethatconsistsofelongatedaperturesin40nmgoldfilm,whichexhibitintriguingpropertiessuchason-andoff-axisfocusingandalsocanconcentratelightintomultiple,discretespotsforcircularlypolarizedincidentlights.First,thespatialtransmissionphasedistributionsofthedesignedmetalenswitharbitraryfocusingcanbeobtainedbycomputergeneratedholography.Then,thediscretephasedistributionscanbecontinuouslyencodedbysubwavelengthnanoapertureswithspatiallyvaryingorientationsingoldfilm.Thesimulationresultsshowthatourdesignedmetalenscanworkefficientlyfordifferenttypesoffocusing.Finally,ourmetasurfaceshowssuperiorbroadbandcharacteristicsbetween670and810nm,andthecorrespondingfocallengthsofthedesignedlensesalsocanbeefficientlymodulatedwiththeincidentlightsatdifferentwavelengths.
出版日期
2015年05月15日（中国期刊网平台首次上网日期，不代表论文的发表时间）
