Graphene microcavity frequency combs and related methods of manufacturing
US11105979B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2018 |
| Grant date | Aug 31, 2021 |
| Priority date | — |
| Expiry date | Aug 30, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/56
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Based on graphene heterostructure in chip-scale silicon nitride microresonators, optoelectronic control and modulation in frequency combs via group velocity dispersion modulation can be demonstrated. By tuning graphene Fermi level from 0.50 eV to 0.65 eV via electric-field gating, deterministic in-cavity group velocity dispersion control from anomalous (−62 fs2/mm) to normal (+9 fs2/mm) can be achieved with Q factor remaining high at 106. Consequently, both the primary comb lines and the full comb spectra can be controllable dynamically with the on/off switching of the Cherenkov radiation, the tuning of the primary comb lines from 2.3 THz to 7.2 THz, and the comb span control from zero comb lines to ˜781 phase-locked comb lines, directly via the DC voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.