Polaritonic frequency-comb generation and breather propagation in a negative-index metamaterial with a cold four-level atomic medium
Abstract
We develop a concept for a waveguide that exploits spatial control of nonlinear surface-polaritonic waves. Our scheme includes an optical cavity with four-level -type atoms in a lossless dielectric placed above a negative-index metamaterial layer. We propose exciting a polaritonic Akhmediev breather at a certain position of the interface between the atomic medium and the metamaterial by modifying laser-field intensities and detunings. Furthermore, we propose generating position-dependent polaritonic frequency combs by engineering widths of the electromagnetically induced transparency window commensurate with the surface-polaritonic modulation instability. Therefore, this waveguide acts as a high-speed polaritonic modulator and position-dependent frequency-comb generator, which can be applied to compact photonic chips.
Keywords
Cite
@article{arxiv.1902.04536,
title = {Polaritonic frequency-comb generation and breather propagation in a negative-index metamaterial with a cold four-level atomic medium},
author = {Saeid Asgarnezhad-Zorgabad and Pierre Berini and Barry C. Sanders},
journal= {arXiv preprint arXiv:1902.04536},
year = {2019}
}