Terahertz modulator
US9711697B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2012 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Jul 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/13
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
According to one aspect, the present invention concerns a terahertz modulator (1) intended to be used in a given frequency band of use. The modulator comprises a semi-conductor polar crystal (330) presenting a Reststrahlen band overlapping said frequency band of use and presenting at least one interface with a dielectric medium, coupling means (330) allowing the resanant coupling of an interface phonon polariton (IPhP) supported by said interface and of an incident radiation (2) of pre-determined frequency lying in said frequency band of use and means of control (22) apt to modify the intensity of the coupling between said interface phonon polariton and said incident radiation (2) by modification of the dielectric function of the polar crystal in the Reststrahlen band of the polar crystal (10).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.