Integrated optofluidic system using microspheres
US9551650B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2010 |
| Grant date | Jan 24, 2017 |
| Priority date | — |
| Expiry date | Nov 19, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/7789
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An integrated optofluidic system for trapping and transporting particles for analysis is provided comprising a planar substrate; a microfluidic channel; and a waveguide integrated with the channel. A microsphere particle in the integrated optofluidic system can act as a cavity, allowing light to circulate many thousands of times around the circumference of the microsphere. Optical trapping and transport is used for nanoscale positioning to excite the microsphere resonances. Sensitive measurements on molecules can be accomplished by monitoring changes in whispering gallery modes (WGMs) that propagate around the circumference of the microsphere. By using a broadband or supercontinuum light source, a microsphere can be trapped and many WGM resonances can be excited through the visible and near-infrared wavelengths simultaneously. After the resonances are measured using the waveguide transmission, the microsphere can be freed by decreasing the optical power and the process repeated with a different microsphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.