Apparatus and associated methods for reducing noise in photodetectors
US10727361B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2017 |
| Grant date | Jul 28, 2020 |
| Priority date | — |
| Expiry date | Jul 26, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2001/4473
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus configured to alternate the application of first and second gate voltages to a gate electrode of a photodetector. A first change in electrical current is relative to a predetermined measurement of electrical current taken at the first gate voltage in the absence of incident electromagnetic radiation, and a second change in electrical current is relative to a predetermined measurement of electrical current taken at the second gate voltage in the absence of the incident electromagnetic radiation. The photodetector comprises a channel, and source and drain electrodes configured to enable flow of electrical current through the channel. Quantum dots are configured to generate charge carriers on exposure to the incident electromagnetic radiation. The gate electrode is configured to generate an electric field upon the application of a gate voltage thereto, and process the signal to at least partially remove any changes in electrical current which are attributed to noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.