Engineering wavefront caustics trajectories in $\mathcal{P}\mathcal{T}$-symmetric lattices

Nicholas Bender, Hamidreza Ramezani, Tsampikos Kottos

We utilize caustic theory in $\mathcal{P}\mathcal{T}-$symmetric lattices to design focusing and curved beam dynamics. We show that the gain and loss parameter in these systems provides an addit…