Nanoscale object detection using a whispering gallery mode resonator
US8704155B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2010 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Jun 29, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB82Y35/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Detection of individual objects using a light source and a whispering gallery mode (WGM) resonator. Light from the whispering gallery mode (WGM) resonator is analyzed. The presence of an object is determined based on mode splitting associated with the light received by the photodetector. For example, the presence of the object may be determined based on the distance between two whispering gallery modes and/or the linewidths of the two modes in a transmission spectrum. Alternatively, the presence of the object may be determined based on a beat frequency that is determined based on a heterodyne beat signal produced by combining split laser modes in the received light from a WGM microcavity laser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.