Spatial Kramers-Kronig relation and unidirectional light reflection induced by Rydberg dipole-dipole interactions
Abstract
Kramers-Kronig (KK) relation between the dispersion and absorption responses of a signal field can be mapped from the frequency domain into the space domain via the dipole-dipole interactions between a homogeneous sample of target atoms and a control atom. This is achieved by establishing an effective two-level configuration for the three-level target atoms in the single-photon far-detuned driving regime while maintaining a high Rydberg excitation for the three-level control atom in the single-photon resonant driving regime. We find in particular that it is viable to realize a dynamically tunable spatial KK relation supporting asymmetric and even unidirectional reflection for appropriate signal frequencies in a controlled range. Taking a periodic lattice of target atoms instead, multiple Bragg scattering can be further incorporated into spatial KK relation to largely enhance the nonzero reflectivity yet without breaking the asymmetric or unidirectional reflection.
Cite
@article{arxiv.2106.10975,
title = {Spatial Kramers-Kronig relation and unidirectional light reflection induced by Rydberg dipole-dipole interactions},
author = {Di-Di Zheng and Yan Zhang and Yi-Mou Liu and Xiao-Jun Zhang and Jin-Hui Wu},
journal= {arXiv preprint arXiv:2106.10975},
year = {2022}
}
Comments
8 pages, 7 figures