Ultrafast optical switches using quantum wells
US11333908B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2019 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Dec 17, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/01
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Colloidal quantum wells have discrete energy states and electrons in the quantum wells undergo interband and intersubband state transitions. The transmissivity of a colloidal quantum well may be tuned by actively controlling the states of the colloidal quantum wells enabling ultrafast optical switching. A primary excitation source is configured to provide a primary excitation to promote a colloidal quantum well from a ground state to a first excitation state. A secondary excitation source is configured to provide a secondary excitation to the colloidal quantum well to promote the colloidal quantum well from the first excitation state to the second excitation state with the first and second excitation states being subbands in the conduction band of the colloidal quantum well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.