Ultra-fast optical modulation and ultra-short pulse generation based on tunable graphene-plasmonic hybrid metasurfaces
US11733552B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2021 |
| Grant date | Aug 22, 2023 |
| Priority date | — |
| Expiry date | Aug 23, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/11
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical device is disclosed. The optical device includes a silicon substrate, an aluminum oxide layer, an aluminum layer between the silicon substrate and the aluminum oxide layer, and a metasurface nanostructure. The metasurface nanostructure may include a graphene monolayer on the aluminum oxide layer and an electrically conductive nanoantenna array in direct contact with the graphene monolayer, where each nanoantenna in the nanoantenna array may include multiple segments, each segment having one or more parameters selected to achieve simultaneous resonance in the mid-infrared and the near infrared spectral regions when the graphene monolayer is irradiated with a near infrared pump pulse and a continuous mid-infrared probe. The optical device generates mid-infrared pulses via ultrafast modulation of hot carriers in the monolayer graphene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.