Non-diffracting states at exceptional points

Authors

Cem Yuce
Hamidreza Ramezani, The University of Texas Rio Grande ValleyFollow

Document Type

Article

Publication Date

2-5-2021

Abstract

We propose to use exceptional points (EPs) to construct diffraction-free beam propagation and localized power oscillation in lattices. We specifically consider two systems to utilize EPs for diffraction-free beam propagation, one in synthetic gauge lattices and the other one, in unidirectionally coupled resonators where each resonator individually is capable of creating orbital angular momentum beams (OAM). In the second system, we introduce the concept of robust and tunable OAM beam propagation in discrete lattices. We show that one can create robust OAM beams in an arbitrary number of sites of a photonic lattice. Furthermore, we report power oscillation at the EP of a non-Hermitian lattice. Our study widens the study and application of EPs in different photonic systems including the OAM beams and their associated dynamics in discrete lattices.

Comments

Original published version available at https://doi.org/10.1364/OL.411999

Recommended Citation

Yuce, Cem, and Hamidreza Ramezani. "Non-diffracting states at exceptional points." Optics Letters 46, no. 4 (2021): 765-768. https://doi.org/10.1364/OL.411999

Publication Title

Optics Letters

DOI

10.1364/OL.411999