Engineering with vacuum fields
- Date: May 21, 2019
- Time: 10:30 AM - 12:00 PM (Local Time Germany)
- Speaker: Jérôme Faist
- Institute of Quantum Electronics, ETH Zurich
- Location: CFEL (Bldg. 99)
- Room: Seminar Room I-III, EG.076-080
- Host: Angel Rubio
We also demonstrated that such ultra-strong light-matter coupling can be achieved using special geometries where the only less than 100 electrons are effectively coupled to the resonator. One very intriguing feature of the ultra-strong light-matter coupled system is the prediction that photon pairs will be emitted through non-adiabatic modulation of the coupling. To this end, we have realized metamaterials based on highTc superconductors that retain a high quality factor resonance for magnetic field up to 9T and coupled them to two-dimensional electron gases.
We have also used transport to probe the ultra-strong light-matter coupling. In these experiments, we have used transport samples engineered with cavities and studied them under very weak THz irradiation and now irradiation at all, showing an influence of the cavity in both cases.
We have constructed a electro-optic based setup that, we demonstrated recently, enables the probing of the vacuum field in free space and retrieve its first order correlation function in both space and time. Such experiment can be used also to probe the unconventional ground state of the ultra-strongly coupled systems.
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