Optical structures for metal-enhanced sensing
US7095502B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Aug 5, 2003 |
| Grant date | Aug 22, 2006 |
| Priority date | — |
| Expiry date | Apr 9, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/648
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention is directed to optical structures and methods detecting the fluorescence of a molecule using metal-enhanced fluorescence. In particular, the invention describes the use of surface plasmon excitation for excitation of fluorophores near the metal surface and the efficient collection of the emission by coupling into the plasmon resonance and directing towards the detector. More particularly, the present invention makes use of the unique directionality of the plasmon induced fluorescence signal. The present invention is directed to optical structures using metal enhanced fluorescence including: an optical fiber having a conductive external coating; a light emitting diode (LED) having a conical shaped depression with curved sides on a front end surface, the curved sides having a conducting coating on the outer surface with respect to the LED.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.