Compressible photonic crystal
US8676016B2 · kind B2 · utility
4Cited by
4References
59Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 16, 2007 |
| Grant date | Mar 18, 2014 |
| Priority date | — |
| Expiry date | May 29, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J5/18
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
A compressible photonic crystal comprising a polymer with an ordered array of voids, the photonic crystal having a reflectance in a first wavelength range for light incident to its incident surface and its opposing incident surface; wherein compression against at least a portion of at least one of the surfaces shifts the reflectance to a second wavelength range in at least that portion of that surface. The crystal may be used in authentication devices of various types.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.