Microcavity Raman sensor and method of use
US8599373B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 2012 |
| Grant date | Dec 3, 2013 |
| Priority date | — |
| Expiry date | Jul 26, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/65
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In accordance with the present invention, an ultra-sensitive Raman chemical sensor is provided that is based on an enhanced spontaneous emission as a result of cavity quantum electrodynamic effects. More specifically, the sensor in accordance with the present invention makes use of a double resonance of a microcavity with both the excitation laser frequency and the Raman frequency. As such, the Raman shift corresponds to an integer times the free spectral range of the microcavity. Because the Raman frequency directly depends on the excitation laser's frequency, the fulfillment of the resonance condition for the excitation laser frequency guarantees that resonance with the Raman frequency is also satisfied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.