Detecting one or more photons from their interactions with probe photons in a matter system
US7002133B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2003 |
| Grant date | Feb 21, 2006 |
| Priority date | — |
| Expiry date | Mar 18, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB82Y10/00
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
A device capable of efficiently detecting a single-photon signal includes a matter system, sources of a first beam and a second beam, and a measurement system. The matter system has a first energy level and a second energy level such that a signal photon couples to a transition between the first energy level and the second energy level. The first beam contains photons that couple to a transition between the second energy level and a third energy level of the matter system, and the second beam contains photons that couple to a transition between the third energy level and a fourth energy level of the matter system. The measurement system measures a change in the first or second beam to detect the absence, the presence, or the number of the photons in the signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.