Ultrastrong light-matter coupling at terahertz frequencies with split ring resonators and inter-Landau level transitions

作者：Scalari G^*; Maissen C; Hagenmueller D; De Liberato S; Ciuti C; Reichl C; Wegscheider W; Schuh D; Beck M; Faist J

来源：Journal of Applied Physics, 2013, 113(13): 136510.

DOI：10.1063/1.4795543

We study strong light-matter coupling at terahertz frequencies employing a system based on an array of deeply subwavelength split ring resonators deposited on top of an ensemble of modulation-doped quantum wells. By applying a magnetic field parallel to the epitaxial growth axis, at low temperatures, Landau Levels are formed. We probe the interaction of the inter-Landau level transitions with the resonators modes, measuring a normalized coupling ratio Omega/omega(c) - 0.58 between the inter-Landau level frequency omega(c) and the Rabi frequency Omega of the system. The physics of the system is studied as a function of the metasurface composition and of the number of quantum wells. We demonstrate that the light-matter coupling strength is basically independent from the metamaterial lattice spacing.

• 出版日期2013-4-7