Propagation of light through an amplifying honeycomb photonic lattice

Sk Firoz Islam, Pascal Simon, Alexander A. Zyuzin

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We consider light propagation through a ballistic amplifying photonic honeycomb lattice below the lasing threshold. Two sublattices of the system are formed by waveguides with different complex dielectric permittivities, which results in the non-Hermitian Dirac equation for electromagnetic fields. We reveal that there exists a critical length of the amplifying region for which the photonic lattice exhibits an amplifier-to-generator transition. The transmission and reflection probabilities at the normal angle of incidence are strongly enhanced at a critical length of the system. We also comment on the sensitivity of amplification to the direction of incident light and the thickness of the amplifying region.

Original languageEnglish
Article number043504
Number of pages5
JournalPhysical Review A
Issue number4
Publication statusPublished - 7 Oct 2020
MoE publication typeA1 Journal article-refereed

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