Abstract
A kind of polarized chromatic plasmonic film is proposed based on subwavelength grating structure, which enables “blue transmission” for the transverse electric light and “red transmission” for the transverse magnetic light. Metal–insulator–metal plasmonic waveguiding and metallic nanowire scattering are revealed to be responsible for the chromatic shift. Based upon the unique transmission spectrum characteristics of such films, polarized chromatic plasmonic tags (PCPTs) can be flexibly fabricated by patterning dielectric grating templates with designed figures and depositing appropriate thickness of metal. These PCPTs, simultaneously possessing directly visible unpolarized transmission colors and concealed distinct polarization‐dependent color shift, can be widely used as anti‐counterfeiting tags with higher security than the diffractive types of holograms.
| Original language | English |
|---|---|
| Article number | 1800661 |
| Number of pages | 8 |
| Journal | Advanced Materials Technologies |
| Volume | 4 |
| Issue number | 5 |
| Early online date | 18 Feb 2019 |
| DOIs | |
| Publication status | Published - 1 May 2019 |
Keywords
- plasmonic structural colors
- sub-wavelength grating
- metallic nanowire gratings
- polarizer
- color filter