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Traditional optical interference narrow-band-stop filters do not possesswide-angle property, because peaks and troughs of filter spectrum would bemoved at a non-normal angle of incidence (AOI), which could result infunctional failure in particular cases, e.g. blocking of laser for pilot incockpit during premeditated laser pointer direct. For this reason, we designeda wide-angle metamaterial narrow-band-stop filter assembled by cross shapedunits to block 532 nm green light, which is firstly reported in the world.Unnecessary shift of spectrum caused by AOI change is effectively inhibited,and angular tolerance of wide-angle capability achieves to 35 degreesnon-normal AOIs.

A wide-angle metamaterial narrow-band-stop filter for 532 nm wavelength green light