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arXiv · 1902.04536

Polaritonic frequency-comb generation and breather propagation in a negative-index metamaterial with a cold four-level atomic medium

Saeid Asgarnezhad-Zorgabad·Pierre Berini·Barry C. Sanders
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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 $\text{N}$-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.

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Saeid Asgarnezhad-Zorgabad, Pierre Berini, Barry C. Sanders. 2019-02-12. Polaritonic frequency-comb generation and breather propagation in a negative-index metamaterial with a cold four-level atomic medium. https://doi.org/10.1103/physreva.99.051802

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