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Superconducting complementary metasurfaces for THz ultrastrong light-matter coupling

2014; IOP Publishing; Volume: 16; Issue: 3 Linguagem: Inglês

10.1088/1367-2630/16/3/033005

1367-2630

Giacomo Scalari, Curdin Maissen, Sara Cibella, R. Leoni, Pasquale Carelli, Federico Valmorra, Mattias Beck, Jérôme Faist,

Thermal Radiation and Cooling Technologies

A superconducting metasurface operating in the THz range and based on the complementary metamaterial approach is discussed. Experimental measurements as a function of temperature and magnetic field display a modulation of the metasurface with a change in transmission amplitude and frequency of the resonant features. Such a metasurface is successively used in a cavity quantum electrodynamic experiment displaying ultrastrong coupling to the cyclotron transition of two-dimensional electron gas. A finite element modeling is developed and its results are in good agreement with the experimental data. In this system a normalized coupling ratio of is measured and a clear modulation of the polaritonic states as a function of the temperature is observed.