Loading...
Polaritonic frequency-comb generation and breather propagation in a negative-index metamaterial with a cold four-level atomic medium
Asgarnezhad Zorgabad, S ; Sharif University of Technology | 2019
459
Viewed
- Type of Document: Article
- DOI: 10.1103/PhysRevA.99.051802
- Publisher: American Physical Society , 2019
- 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 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
- Keywords:
- Atoms ; Waveguides ; Electromagnetically-induced transparency ; Frequency combs ; Lossless dielectrics ; Modulation instabilities ; Negative index metamaterial ; Nonlinear surface ; Optical cavities ; Position dependents ; Metamaterials
- Source: Physical Review A ; Volume 99, Issue 5 , 2019 ; 24699926 (ISSN)
- URL: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.99.051802