Fluorescent non-metallic particles encapsulated in a metallic coating
US8471217B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 26, 2007 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Aug 31, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/587
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a particle comprising a non-metallic core having a fluorescent material and a metallic shell encapsulating the non-metallic core wherein the metallic shell has transparency for an electromagnetic radiation having a first wavelength to excite the said fluorescent material and reflectance for an electromagnetic radiation having a second wavelength emitted by the said fluorescent material to confine the electromagnetic radiation having the second wavelength in the metallic shell. This system allows for the excitation of optical cavity modes inside the particle even at sub-micron particle size. The cavity modes are extremely sensitive to any change of the dielectric environment of the particle. This sensitivity can be used for the construction of optical nano-biosensors. Another application of the system is that of a microscopic source for spherical light waves, which may find applications in digital inline holography and display technology.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.