Electromagnetically Induced Transparency in Media with Rydberg Excitons 1: Slow Light In this paper, we show that Electromagnetically Induced Transparency (EIT) can be realized in mediums with Rydberg excitons. With realistic, reliable parameters which show good agreement with optical and electrooptical experiments, as well as the proper choice of Rydberg exciton states in the Cu     2    O crystal, we indicate how the EIT can be performed. The calculations show that, due to a large group index, one can expect the slowing down of a light pulse by a factor of about     10 4     in this medium.

HighRefractiveIndex Materials for Giant Enhancement of the Transverse MagnetoOptical Kerr Effect The ability of plasmonic structures to confine and enhance light at nanometer length scales has been traditionally exploited to boost the magnetooptical effects in magnetoplasmonic structures. These platforms allows for light control via externally applied magnetic fields, which is of prime importance for sensing, data storage, opticalisolation, and telecommunications applications. However, applications are hindered by the highlevel of ohmic losses associated to metallic and ferromagnetic components. Here, we use a lossless alldielectric platform for giant enhancement of the magnetooptical effects. Our structure consists of a highrefractive index dielectric film on top of a magnetic dielectric substrate. We numerically demonstrate an extraordinarily enhanced transverse magnetooptical Kerr effect due to the Fabryxe2x80x93Perot resonances supported by the highrefractive index slab. Potential applications for sensing and biosensing are also illustrated in this work.