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

Abstract

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 addition degree of freedom which allows for the design of the same caustics trajectories with different intensity distribution in the individual waveguides. Moreover we can create aberration-free focal points at any paraxial distance $z_f$, with anomalously large focal intensity.

4 pages + one page of full citation references

References in corpus (5)

• Nonreciprocal light transmission in parity-time-symmetric whispering-gallery microcavities
• PT-symmetry breaking and laser-absorber modes in optical scattering systems
• Unidirectional Nonlinear PT-symmetric Optical Structures
• Non-Paraxial Accelerating Beams
• PT-Symmetric Talbot Effects

Cited by in corpus (2)

• PT-symmetric phase in kagome photonic lattices
• One-Way Optical Transition based on Causality in Momentum Space