Control of reflectivity and stop bands in a Bragg stack with a four-layer period

Saghir, S. Khurram; Amann, Andreas; O’Reilly, Eoin P.

doi:10.1016/j.optcom.2008.11.053

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2012

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“…Early work was performed on one- and two-dimensional PCs because the calculation and ease of fabrication allowed for a solid establishment of the field. As such, one-dimensional layered Bragg stacks have now matured into working devices [ 3 , 4 , 5 , 6 ], and many two-dimensional (2D) PCs are commonly applied in wave guides [ 7 , 8 ], fibers [ 9 , 10 ] and other photonic devices [ 11 , 12 ]. Unfortunately, the development of three-dimensional (3D) PCs is quite a bit more difficult.…”

Section: Introductionmentioning

confidence: 99%

Photonic Paint Developed with Metallic Three-Dimensional Photonic Crystals

Sun¹,

Williams²

2012

Materials

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This work details the design and simulation of an inconspicuous photonic paint that can be applied onto an object for anticounterfeit and tag, track, and locate (TTL) applications. The paint consists of three-dimensional metallic tilted woodpile photonic crystals embedded into a visible and infrared transparent polymer film, which can be applied to almost any surface. The tilted woodpile photonic crystals are designed with a specific pass band detectable at nearly all incident angles of light. When painted onto a surface, these crystals provide a unique reflective infra-red optical signature that can be easily observed and recorded to verify the location or contents of a package.

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